# @langchain/anthropic

## 1.6.0

### Minor Changes

- [#11986](https://github.com/langchain-ai/langchainjs/pull/11986) [`2caf64d`](https://github.com/langchain-ai/langchainjs/commit/2caf64da3f02730f3cd2aab0c15de6eab41a01da) Thanks [@richardscarrott](https://github.com/richardscarrott)! - feat: stream tool-call args as `tool-call-delta` slices

  Tool-call and server-tool-call args now stream as `tool-call-delta` events, which carry only the new slice of the args, instead of `block-delta` snapshots of the args so far. A large tool call now costs about the same bytes on the wire as the same length of text.

  - This covers the compat bridge (any model that only implements `_streamResponseChunks`), the OpenAI-compatible converter (OpenAI Completions, Groq, Mistral, IBM, OpenRouter, Perplexity, DeepSeek, Fireworks, Together AI and xAI Completions), OpenAI and xAI Responses, Anthropic (client and server tool calls) and Bedrock Converse. Google and Ollama still send one complete snapshot per call.
  - A tool call's `id`, `name` and `index` go on `content-block-start`, which carries no args. An `id` or `name` that arrives later reaches consumers on `content-block-finish`.
  - If you read raw events and their `block-delta` `fields.args` mid-stream, or write agent stream transformers that do, read `tool-call-delta` instead. `await stream`, `.toolCalls` and the assembled message are unchanged.
  - Upgrade your clients first. Older clients mishandle `tool-call-delta`. You need `@langchain/langgraph-sdk` 1.12.6 or later; `@langchain/react`, `@langchain/vue`, `@langchain/svelte` or `@langchain/angular` 1.2.6 or later; and `langchain-core` 1.6.13 or later for Python clients.
  - To hold back, pin `@langchain/core` below 1.3.0. That also keeps you on `@langchain/openai`, `@langchain/anthropic`, `@langchain/aws` and `@langchain/xai` versions that send snapshots.

## 1.5.13

### Patch Changes

- [#11922](https://github.com/langchain-ai/langchainjs/pull/11922) [`d71c542`](https://github.com/langchain-ai/langchainjs/commit/d71c542fb1d9cd1ceb310a4759591c024cf0d57d) Thanks [@richardscarrott](https://github.com/richardscarrott)! - feat(anthropic): declare mid-conversation support in model profiles. Claude Opus 4.8, Opus 5, Opus 5.5, Sonnet 5.5, Haiku 5.5, Fable 5 and 5.1, and Mythos 5 and 5.1 set `midConversationSystemMessages` and `midConversationTools`. Sonnet 5 sets system messages only.

  Regenerating the profiles from models.dev also adds Claude Opus 5.5, Sonnet 5.5 and Haiku 5.5, removes Claude Opus 4.1, and lowers Claude Sonnet 4.5's `maxInputTokens` to 200,000.

## 1.5.12

### Patch Changes

- [#11707](https://github.com/langchain-ai/langchainjs/pull/11707) [`4109812`](https://github.com/langchain-ai/langchainjs/commit/41098120e01596743a588c149230a3580729c289) Thanks [@richardscarrott](https://github.com/richardscarrott)! - feat(anthropic): support mid-conversation tool changes. A `SystemMessage` can now carry Anthropic's `tool_addition` and `tool_removal` blocks, either bare in `content` or wrapped in a `non_standard` block, and they reach the provider verbatim. The required beta is added automatically: `mid-conversation-tool-changes-2026-07-01` for tools named by reference, or `inline-tools-2026-09-15` when a `tool_addition` defines a tool by value (`tool: { type: "tool_definition", definition }`).

  System content is now narrowed to what Anthropic accepts there. `text`, `tool_addition` and `tool_removal` are sent; any other block is dropped instead of being forwarded for the provider to reject. A system message left with no content is omitted.

## 1.5.11

### Patch Changes

- [#11669](https://github.com/langchain-ai/langchainjs/pull/11669) [`fb2a9f3`](https://github.com/langchain-ai/langchainjs/commit/fb2a9f378e752a2dddea4af14d9c33deb185f067) Thanks [@richardscarrott](https://github.com/richardscarrott)! - feat(anthropic): accept a `SystemMessage` anywhere in the message list. Previously only the first message could be a system message. Anything else threw.

  A system message that isn't first is now sent at its own position. It applies from that point in the conversation onwards, and adding one leaves the prompt cache for the earlier turns intact.

  Two smaller changes come with it. A leading run of two or more `SystemMessage`s now merges into the top-level `system` field instead of being rejected. System content built from standard content blocks no longer sends the internal block `id` to the provider.

## 1.5.10

### Patch Changes

- [#11530](https://github.com/langchain-ai/langchainjs/pull/11530) [`c9b7eac`](https://github.com/langchain-ai/langchainjs/commit/c9b7eac3523cbaa3aead92196d6bca275ebaf55c) Thanks [@hntrl](https://github.com/hntrl)! - Add support for Claude Fable 5.1.

## 1.5.10-rc.0

### Patch Changes

- [#11530](https://github.com/langchain-ai/langchainjs/pull/11530) [`c9b7eac`](https://github.com/langchain-ai/langchainjs/commit/c9b7eac3523cbaa3aead92196d6bca275ebaf55c) Thanks [@hntrl](https://github.com/hntrl)! - Add support for Claude Fable 5.1.

## 1.5.9

### Patch Changes

- [#11475](https://github.com/langchain-ai/langchainjs/pull/11475) [`6bffc71`](https://github.com/langchain-ai/langchainjs/commit/6bffc7120a8d696089cc2f88e2eb15ad871deeca) Thanks [@davila7](https://github.com/davila7)! - feat(anthropic): add claude-sonnet-5 support

## 1.5.8

### Patch Changes

- [#11421](https://github.com/langchain-ai/langchainjs/pull/11421) [`041a755`](https://github.com/langchain-ai/langchainjs/commit/041a75581666a7fd551e6df62226dcf873be50cc) Thanks [@priprocess](https://github.com/priprocess)! - Preserve the generic `tool_search_tool_result` block type in streaming output and message payload conversion. The Anthropic API emits this un-suffixed type for both tool search variants; previously only the variant-suffixed names were allowlisted, so multi-turn conversations using tool search still failed with INVALID_TOOL_RESULTS after a client-tool round-trip.

## 1.5.7

### Patch Changes

- [#11407](https://github.com/langchain-ai/langchainjs/pull/11407) [`3ceef4b`](https://github.com/langchain-ai/langchainjs/commit/3ceef4baadfaec8f0b1e43191b9363cfcc04187f) Thanks [@chenzimin](https://github.com/chenzimin)! - Round-trip the tool search server-tool result blocks (`tool_search_tool_bm25_tool_result` / `tool_search_tool_regex_tool_result`) through message translation, mirroring `web_search_tool_result`. Without this, a multi-turn conversation using the tool search tool fails on the next request with `400 invalid_request_error … tool use … found without a corresponding … tool_result block`, because the result block was dropped from the assistant message (streaming capture) and on re-send (`toolTypes` passthrough).

## 1.5.6

### Patch Changes

- [#11342](https://github.com/langchain-ai/langchainjs/pull/11342) [`3b0e4c4`](https://github.com/langchain-ai/langchainjs/commit/3b0e4c48a31811031a460c4d95519a7c1163dc41) Thanks [@thushanth-bengre-langchain](https://github.com/thushanth-bengre-langchain)! - feat(anthropic): mark Anthropic provider errors as retryable or not

  Builds on `stampRetryable` in `@langchain/core` so the retry middleware can tell a transient failure from a deterministic one. Rate limits are marked retryable; context overflow, invalid tool results, bad credentials, and unknown models non-retryable. Anything else stays unmarked and retries as before.

  Also forwards a per-call `maxRetries` to the retry loop, so a surrounding retry loop such as `modelRetryMiddleware` can take over instead of the two multiplying against each other.

  Errors keep their original class, so `instanceof` against the `@anthropic-ai/sdk` error types is unaffected.

## 1.5.5

### Patch Changes

- [#11359](https://github.com/langchain-ai/langchainjs/pull/11359) [`d36ec6a`](https://github.com/langchain-ai/langchainjs/commit/d36ec6a6f4b1c474b0d9f9cb6037ff37f54183bf) Thanks [@talarari](https://github.com/talarari)! - fix(anthropic): preserve gateway cost on the native stream path

  `convertAnthropicStream` now surfaces an Anthropic-compatible gateway's numeric `usage.cost` at `response_metadata.usage.cost`, matching the chunk path. Token accounting in `usage_metadata` is unchanged.

## 1.5.4

### Patch Changes

- [#11305](https://github.com/langchain-ai/langchainjs/pull/11305) [`e654022`](https://github.com/langchain-ai/langchainjs/commit/e654022e291b8dae54504ac2d1a3232332406723) Thanks [@jacoblee93](https://github.com/jacoblee93)! - Add LangSmith Gateway environment configuration to OpenAI, Anthropic, and Fireworks chat models.

- [#11310](https://github.com/langchain-ai/langchainjs/pull/11310) [`1b96abe`](https://github.com/langchain-ai/langchainjs/commit/1b96abe4979d514e11fb794ed9e85b646ea3b4a5) Thanks [@hntrl](https://github.com/hntrl)! - fix(anthropic): filter tools with unsupported root schema composition

## 1.5.3

### Patch Changes

- [#11242](https://github.com/langchain-ai/langchainjs/pull/11242) [`1c4dadb`](https://github.com/langchain-ai/langchainjs/commit/1c4dadbc684b0fe08a34d4a5249d84b6cb110f07) Thanks [@talarari](https://github.com/talarari)! - Preserve gateway-provided cost metadata in Anthropic streams.

## 1.5.2

### Patch Changes

- [#11255](https://github.com/langchain-ai/langchainjs/pull/11255) [`c8bd4c4`](https://github.com/langchain-ai/langchainjs/commit/c8bd4c4a6dbde07fb24deb5870c02dc29c51ab53) Thanks [@hntrl](https://github.com/hntrl)! - feat(anthropic): add claude-opus-5 support

## 1.5.1

### Patch Changes

- [#11073](https://github.com/langchain-ai/langchainjs/pull/11073) [`baa57ba`](https://github.com/langchain-ai/langchainjs/commit/baa57ba7cdce2046ba3dd40e9e8cf3c93c9c1ac4) Thanks [@archievi](https://github.com/archievi)! - Stop sending `thinking: { type: "disabled" }` on `ChatAnthropic` requests when the user never configured thinking. The disabled value is now only emitted when it is explicitly set, so adaptive-only models (e.g. `claude-fable-5`) that reject an explicit `thinking.type: "disabled"` no longer fail with a 400 on a default `ChatAnthropic` instance.

## 1.5.0

### Minor Changes

- [#10924](https://github.com/langchain-ai/langchainjs/pull/10924) [`2e28115`](https://github.com/langchain-ai/langchainjs/commit/2e2811509d75af94f57cedcc3842f178f4c020d1) Thanks [@christian-bromann](https://github.com/christian-bromann)! - feat(anthropic): update native streamEvents event coverage

## 1.4.1

### Patch Changes

- [#11040](https://github.com/langchain-ai/langchainjs/pull/11040) [`7f57363`](https://github.com/langchain-ai/langchainjs/commit/7f573630ccccd9c1377f7e6084a59c0a2ce35531) Thanks [@hntrl](https://github.com/hntrl)! - feat(anthropic): add support for claude-fable-5 and claude-mythos-5 models
  - upgrade `@anthropic-ai/sdk` to `^0.103.0`
  - add default token handling and adaptive-thinking parameter compatibility for Anthropic 5-series models
  - add unit and integration coverage for default-parameter behavior on new model IDs

## 1.4.0

### Minor Changes

- [#10777](https://github.com/langchain-ai/langchainjs/pull/10777) [`0cfcfc6`](https://github.com/langchain-ai/langchainjs/commit/0cfcfc66897d8fafeb7e7ed90b7299eace9a7c37) Thanks [@jonaslalin](https://github.com/jonaslalin)! - feat(anthropic): support strict tool calling for custom tools

## 1.3.29

### Patch Changes

- [#10735](https://github.com/langchain-ai/langchainjs/pull/10735) [`1a2a08a`](https://github.com/langchain-ai/langchainjs/commit/1a2a08a33b7d99ec7348678116cc5d074db137bb) Thanks [@chenzimin](https://github.com/chenzimin)! - feat(anthropic): add automatic prompt caching via top-level cache_control

## 1.3.28

### Patch Changes

- [#10776](https://github.com/langchain-ai/langchainjs/pull/10776) [`20a9abe`](https://github.com/langchain-ai/langchainjs/commit/20a9abea23ffacf4ae8dc9a7aeec217143bbdeb6) Thanks [@hntrl](https://github.com/hntrl)! - fix(deps): remediate uuid vulnerability by removing direct uuid usage

- Updated dependencies [[`20a9abe`](https://github.com/langchain-ai/langchainjs/commit/20a9abea23ffacf4ae8dc9a7aeec217143bbdeb6)]:
  - @langchain/core@1.1.42

## 1.3.27

### Patch Changes

- [#10726](https://github.com/langchain-ai/langchainjs/pull/10726) [`ad153c1`](https://github.com/langchain-ai/langchainjs/commit/ad153c185b6cf813d4b7695740d9a4453d2cb63f) Thanks [@hntrl](https://github.com/hntrl)! - feat(anthropic): add Claude Opus 4.7 compatibility updates

- Updated dependencies [[`589f29c`](https://github.com/langchain-ai/langchainjs/commit/589f29ce844eb252c2d5e6b0f8d26de37763a0d7), [`2e9e696`](https://github.com/langchain-ai/langchainjs/commit/2e9e6969e248a53ede0659a41d0ac8dbaf291ab4)]:
  - @langchain/core@1.1.41

## 1.3.26

### Patch Changes

- [#10519](https://github.com/langchain-ai/langchainjs/pull/10519) [`cd86fea`](https://github.com/langchain-ai/langchainjs/commit/cd86fea8de2130d0df60805baada81958d47c747) Thanks [@baptistejamin](https://github.com/baptistejamin)! - fix: implement tool choice required on anthropic

- Updated dependencies [[`589ab9b`](https://github.com/langchain-ai/langchainjs/commit/589ab9be391a5d6c104f34877fc1b3e2a32fa449)]:
  - @langchain/core@1.1.38

## 1.3.25

### Patch Changes

- [#10467](https://github.com/langchain-ai/langchainjs/pull/10467) [`da85f31`](https://github.com/langchain-ai/langchainjs/commit/da85f31688e708340a711fd43cf293b5cb69c133) Thanks [@hntrl](https://github.com/hntrl)! - fix: add default max tokens for sonnet

- Updated dependencies [[`bfb7944`](https://github.com/langchain-ai/langchainjs/commit/bfb7944a105470eee98fe4a0eef91e586600e1de)]:
  - @langchain/core@1.1.34

## 1.3.24

### Patch Changes

- [#10420](https://github.com/langchain-ai/langchainjs/pull/10420) [`08657f2`](https://github.com/langchain-ai/langchainjs/commit/08657f21b330ee05b86a8abd557aef3939f5581b) Thanks [@pawel-twardziak](https://github.com/pawel-twardziak)! - Fix temperature/topK/topP handling: guard all three so undefined values are not
  set on the request object, and fix broken topK/topP validation when thinking is
  enabled.
- Updated dependencies [[`6db417b`](https://github.com/langchain-ai/langchainjs/commit/6db417b03ecb5e2ace413389d982294e0ac88433), [`d69dfcc`](https://github.com/langchain-ai/langchainjs/commit/d69dfcca97503cf1c0b7e70ccf5fb7d507c60982)]:
  - @langchain/core@1.1.33

## 1.3.23

### Patch Changes

- [#10250](https://github.com/langchain-ai/langchainjs/pull/10250) [`8252619`](https://github.com/langchain-ai/langchainjs/commit/8252619b727bfcc37a3f01921edf3550d50949f6) Thanks [@JadenKim-dev](https://github.com/JadenKim-dev)! - fix(anthropic): prevent cache token double-counting in streaming

- Updated dependencies [[`26488b5`](https://github.com/langchain-ai/langchainjs/commit/26488b596f01b7b7fe2f1d97d07164e52365ade5), [`ca826f6`](https://github.com/langchain-ai/langchainjs/commit/ca826f6fecae6087bf0dee7781ee80b587396ec1), [`a602c42`](https://github.com/langchain-ai/langchainjs/commit/a602c42db75d7e7e01cab38b12e0b65b9c0cce95), [`db7d017`](https://github.com/langchain-ai/langchainjs/commit/db7d017f7ce13cb937147aabcbfa3847d80bde9d)]:
  - @langchain/core@1.1.32

## 1.3.22

### Patch Changes

- [#10207](https://github.com/langchain-ai/langchainjs/pull/10207) [`acab2f7`](https://github.com/langchain-ai/langchainjs/commit/acab2f75d6661b17b5f5f5eceb113427f7d32036) Thanks [@colifran](https://github.com/colifran)! - feat(anthropic): implement standard schema support for structured output

- Updated dependencies [[`96c630d`](https://github.com/langchain-ai/langchainjs/commit/96c630dfd009f2546d5bc36f5067ff868bb4067f), [`a8b9ccc`](https://github.com/langchain-ai/langchainjs/commit/a8b9ccca5a85984a5a30008acd09f9991e591638), [`a1f22bb`](https://github.com/langchain-ai/langchainjs/commit/a1f22bba907731a18dca23c31cec5333444a3f55)]:
  - @langchain/core@1.1.30

## 1.3.21

### Patch Changes

- [#10106](https://github.com/langchain-ai/langchainjs/pull/10106) [`9f30267`](https://github.com/langchain-ai/langchainjs/commit/9f30267e95a2a42fac71f1d3674b84c5a190dbbc) Thanks [@hntrl](https://github.com/hntrl)! - Add package version metadata to runnable traces. Each package now stamps its version in `this.metadata.versions` at construction time, making version info available in LangSmith trace metadata.

- [#10166](https://github.com/langchain-ai/langchainjs/pull/10166) [`e9c41f0`](https://github.com/langchain-ai/langchainjs/commit/e9c41f0ab9ea6e7fdeceffa9063a422d4fb62777) Thanks [@kanweiwei](https://github.com/kanweiwei)! - fix(anthropic): only set topP when defined to avoid API error

- Updated dependencies [[`9f30267`](https://github.com/langchain-ai/langchainjs/commit/9f30267e95a2a42fac71f1d3674b84c5a190dbbc), [`403a99f`](https://github.com/langchain-ai/langchainjs/commit/403a99fd826383f30300809ae077e1c967023520), [`3b1fd54`](https://github.com/langchain-ai/langchainjs/commit/3b1fd5458a4aa29c398122829f383f21b5ac39da), [`77bd982`](https://github.com/langchain-ai/langchainjs/commit/77bd98274a885e947d76f7a9c6dd0b3763453218)]:
  - @langchain/core@1.1.29

## 1.3.20

### Patch Changes

- [#10117](https://github.com/langchain-ai/langchainjs/pull/10117) [`66df7fa`](https://github.com/langchain-ai/langchainjs/commit/66df7fa31f43be9eb148bbe0768d26e6d67d6216) Thanks [@hntrl](https://github.com/hntrl)! - fix(anthropic): convert tool_calls to tool_use blocks when AIMessage content is an empty array

  When `AIMessage.content` was an empty array `[]` with `tool_calls` present, the tool calls were silently dropped during message formatting. This caused Anthropic API requests to fail with a 400 error. The array content branch now appends any tool_calls not already represented in the content array as `tool_use` blocks, matching the behavior of the string content path.

- [#10108](https://github.com/langchain-ai/langchainjs/pull/10108) [`e7576ee`](https://github.com/langchain-ai/langchainjs/commit/e7576ee9e6408c399c08d271db43f63e622da10f) Thanks [@hntrl](https://github.com/hntrl)! - fix: replace retired Anthropic model IDs with active replacements
  - Update default model in ChatAnthropic from `claude-3-5-sonnet-latest` to `claude-sonnet-4-5-20250929`
  - Regenerate model profiles with latest data from models.dev API
  - Replace retired `claude-3-5-haiku-20241022`, `claude-3-7-sonnet-20250219`, `claude-3-5-sonnet-20240620`, and `claude-3-5-sonnet-20241022` in tests, docstrings, and examples

## 1.3.19

### Patch Changes

- [#10080](https://github.com/langchain-ai/langchainjs/pull/10080) [`b583729`](https://github.com/langchain-ai/langchainjs/commit/b583729e99cf0c035630f6b311c4d069a1980cca) Thanks [@hntrl](https://github.com/hntrl)! - Add string-model constructor overloads for chat models (with supporting tests where applicable).

- Updated dependencies [[`fb2226e`](https://github.com/langchain-ai/langchainjs/commit/fb2226e6decdaba21e78b3f01877b45fa1eed6d3)]:
  - @langchain/core@1.1.27

## 1.3.18

### Patch Changes

- [#10077](https://github.com/langchain-ai/langchainjs/pull/10077) [`05396f7`](https://github.com/langchain-ai/langchainjs/commit/05396f7ce0a91c49a3bae4bbcd3dbdd6cbd18089) Thanks [@christian-bromann](https://github.com/christian-bromann)! - feat(core): add ContextOverflowError, raise in anthropic and openai

- [#10081](https://github.com/langchain-ai/langchainjs/pull/10081) [`5a6f26b`](https://github.com/langchain-ai/langchainjs/commit/5a6f26bbaed80195dc538c538b96219a8b03f38f) Thanks [@hntrl](https://github.com/hntrl)! - feat(core): add namespace-based symbol branding for error class hierarchies

  Introduces `createNamespace` utility for hierarchical symbol-based branding of class hierarchies.
  All LangChain error classes now use this pattern, replacing hand-rolled duck-type `isInstance` checks
  with reliable cross-realm `Symbol.for`-based identity.
  - New `LangChainError` base class that all LangChain errors extend
  - New `createNamespace` / `Namespace` API in `@langchain/core/utils/namespace`
  - Refactored `ModelAbortError`, `ContextOverflowError` to use namespace branding
  - Added `ContextOverflowError.fromError()` static factory method
  - Deprecated `addLangChainErrorFields` in favor of `LangChainError` subclasses
  - Migrated Google provider errors (`GoogleError`, `ConfigurationError`, etc.) to namespace branding
  - Updated Anthropic and OpenAI providers to use `ContextOverflowError.fromError()`

- [#10078](https://github.com/langchain-ai/langchainjs/pull/10078) [`7be50a7`](https://github.com/langchain-ai/langchainjs/commit/7be50a7014d7622e0ab8d303dfc9c633ebc96333) Thanks [@christian-bromann](https://github.com/christian-bromann)! - chore(\*): update model profiles

- Updated dependencies [[`27186c5`](https://github.com/langchain-ai/langchainjs/commit/27186c54884cfe7c2522fa50b42c3ca0ccaefdba), [`05396f7`](https://github.com/langchain-ai/langchainjs/commit/05396f7ce0a91c49a3bae4bbcd3dbdd6cbd18089), [`5a6f26b`](https://github.com/langchain-ai/langchainjs/commit/5a6f26bbaed80195dc538c538b96219a8b03f38f)]:
  - @langchain/core@1.1.25

## 1.3.17

### Patch Changes

- [#9991](https://github.com/langchain-ai/langchainjs/pull/9991) [`dca939d`](https://github.com/langchain-ai/langchainjs/commit/dca939dee687b2a0a0a56dfbb1677ab2cd1ceb62) Thanks [@nickwinder](https://github.com/nickwinder)! - fix(anthropic): update MODEL_DEFAULT_MAX_OUTPUT_TOKENS with correct values for all Claude models

- Updated dependencies [[`d5e3db0`](https://github.com/langchain-ai/langchainjs/commit/d5e3db0d01ab321ec70a875805b2f74aefdadf9d)]:
  - @langchain/core@1.1.21

## 1.3.16

### Patch Changes

- Updated dependencies [[`71c3cba`](https://github.com/langchain-ai/langchainjs/commit/71c3cba843ab16d877299d158a1de0c7d22f3fb9)]:
  - @langchain/core@1.1.20

## 1.3.15

### Patch Changes

- [#9932](https://github.com/langchain-ai/langchainjs/pull/9932) [`4f7f9c7`](https://github.com/langchain-ai/langchainjs/commit/4f7f9c77a42d361d995c938f79772801cd429a9f) Thanks [@hntrl](https://github.com/hntrl)! - feat(anthropic): add Claude Opus 4.6 support with adaptive thinking, effort parameter, compaction API, output_config migration, inference_geo, and structured outputs GA
  - Upgrade `@anthropic-ai/sdk` from `^0.71.0` to `^0.73.0`
  - Add `claude-opus-4-6` model with 16384 default max output tokens
  - Support adaptive thinking (`thinking: { type: "adaptive" }`) recommended for Opus 4.6
  - Add `outputConfig` parameter with effort levels (`low`, `medium`, `high`, `max`) for controlling token usage
  - Migrate `outputFormat` to `outputConfig.format` (backwards compatible, `outputFormat` deprecated)
  - Add compaction API support (beta) with auto-detection of `compact_20260112` edits and streaming handlers for compaction content blocks
  - Add `inferenceGeo` parameter for data residency controls
  - Remove structured-outputs beta header requirement (now GA)

## 1.3.14

### Patch Changes

- Updated dependencies [[`41bfea5`](https://github.com/langchain-ai/langchainjs/commit/41bfea51cf119573a3b956ee782d2731fe71c681)]:
  - @langchain/core@1.1.19

## 1.3.13

### Patch Changes

- [#9881](https://github.com/langchain-ai/langchainjs/pull/9881) [`0c64698`](https://github.com/langchain-ai/langchainjs/commit/0c646989761d11eaa66a3290392ddb94ad54d5bd) Thanks [@marvikomo](https://github.com/marvikomo)! - handle standard file content blocks

- [#9900](https://github.com/langchain-ai/langchainjs/pull/9900) [`a9b5059`](https://github.com/langchain-ai/langchainjs/commit/a9b50597186002221aaa4585246e569fa44c27c8) Thanks [@hntrl](https://github.com/hntrl)! - Improved abort signal handling for chat models:
  - Added `ModelAbortError` class in `@langchain/core/errors` that contains partial output when a model invocation is aborted mid-stream
  - `invoke()` now throws `ModelAbortError` with accumulated `partialOutput` when aborted during streaming (when using streaming callback handlers)
  - `stream()` throws a regular `AbortError` when aborted (since chunks are already yielded to the caller)
  - All provider implementations now properly check and propagate abort signals in both `_generate()` and `_streamResponseChunks()` methods
  - Added standard tests for abort signal behavior

- [#9900](https://github.com/langchain-ai/langchainjs/pull/9900) [`a9b5059`](https://github.com/langchain-ai/langchainjs/commit/a9b50597186002221aaa4585246e569fa44c27c8) Thanks [@hntrl](https://github.com/hntrl)! - fix(providers): add proper abort signal handling for invoke and stream operations
  - Added early abort check (`signal.throwIfAborted()`) at the start of `_generate` methods to immediately throw when signal is already aborted
  - Added abort signal checks inside streaming loops in `_streamResponseChunks` to return early when signal is aborted
  - Propagated abort signals to underlying SDK calls where applicable (Google GenAI, Google Common/VertexAI, Cohere)
  - Added standard tests for abort signal behavior in `@langchain/standard-tests`

  This enables proper cancellation behavior for both invoke and streaming operations, and allows fallback chains to correctly proceed to the next runnable when the previous one is aborted.

- Updated dependencies [[`a9b5059`](https://github.com/langchain-ai/langchainjs/commit/a9b50597186002221aaa4585246e569fa44c27c8), [`a9b5059`](https://github.com/langchain-ai/langchainjs/commit/a9b50597186002221aaa4585246e569fa44c27c8)]:
  - @langchain/core@1.1.18

## 1.3.12

### Patch Changes

- [#9854](https://github.com/langchain-ai/langchainjs/pull/9854) [`160b5bf`](https://github.com/langchain-ai/langchainjs/commit/160b5bfe49f31190d28ec10a95075ef845c49fa3) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(anthropic): apply cache_control at final formatting layer

- [#9852](https://github.com/langchain-ai/langchainjs/pull/9852) [`35c7723`](https://github.com/langchain-ai/langchainjs/commit/35c7723b9953cc417cedb362e697632936d50820) Thanks [@marvikomo](https://github.com/marvikomo)! - Fix image content blocks being silently dropped when using ContentBlock.Multimodal.Image format with url, data, or fileId properties

- [#9841](https://github.com/langchain-ai/langchainjs/pull/9841) [`54dfdce`](https://github.com/langchain-ai/langchainjs/commit/54dfdce99b1d1c16e1024c136ca86e7d78d76d80) Thanks [@yukukotani](https://github.com/yukukotani)! - Fix input_tokens calculation in usage metadata

- Updated dependencies [[`05a9733`](https://github.com/langchain-ai/langchainjs/commit/05a9733448a10764c0bfd070af859c33e623b998)]:
  - @langchain/core@1.1.17

## 1.3.11

### Patch Changes

- [#9809](https://github.com/langchain-ai/langchainjs/pull/9809) [`aeb63b7`](https://github.com/langchain-ai/langchainjs/commit/aeb63b729a575775b19d988a1e14ae17f66a8373) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(anthropic): consolidate input_json_delta blocks in streaming toolcalls

- Updated dependencies [[`70387a1`](https://github.com/langchain-ai/langchainjs/commit/70387a144464539d65a546c8130cf51dfad025a1), [`a7c6ec5`](https://github.com/langchain-ai/langchainjs/commit/a7c6ec51ab9baa186ab5ebf815599c08f5c7e8ab), [`5e04543`](https://github.com/langchain-ai/langchainjs/commit/5e045435a783fdae44bc9a43e01a8e5eb7100db2), [`40b4467`](https://github.com/langchain-ai/langchainjs/commit/40b446762445575844610ee528abc77c247b2c43), [`17e30bd`](https://github.com/langchain-ai/langchainjs/commit/17e30bd7f4c7bdf87c9c30304b3b9e121cc1fbbc)]:
  - @langchain/core@1.1.16

## 1.3.10

### Patch Changes

- [#9792](https://github.com/langchain-ai/langchainjs/pull/9792) [`7169eba`](https://github.com/langchain-ai/langchainjs/commit/7169ebac71574daf370d7c2f5b3e8bbfe4e25df7) Thanks [@xkcm](https://github.com/xkcm)! - Fixed converting partial tool inputs

- Updated dependencies [[`230462d`](https://github.com/langchain-ai/langchainjs/commit/230462d28c3a8b5ccadf433ea2f523eb6e658de6)]:
  - @langchain/core@1.1.15

## 1.3.9

### Patch Changes

- Updated dependencies [[`bd1ab45`](https://github.com/langchain-ai/langchainjs/commit/bd1ab45364391f69ce93ecba36a4a15dafca2b76)]:
  - @langchain/core@1.1.14

## 1.3.8

### Patch Changes

- [#9777](https://github.com/langchain-ai/langchainjs/pull/9777) [`3efe79c`](https://github.com/langchain-ai/langchainjs/commit/3efe79c62ff2ffe0ada562f7eecd85be074b649a) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(core): properly elevate reasoning tokens

- Updated dependencies [[`3efe79c`](https://github.com/langchain-ai/langchainjs/commit/3efe79c62ff2ffe0ada562f7eecd85be074b649a), [`b8561c1`](https://github.com/langchain-ai/langchainjs/commit/b8561c17556bdf7a3ff8d70bc307422642a9172e)]:
  - @langchain/core@1.1.13

## 1.3.7

### Patch Changes

- Updated dependencies [[`23be5af`](https://github.com/langchain-ai/langchainjs/commit/23be5afd59b5f4806edef11937ce5e2ba300f7ee)]:
  - @langchain/core@1.1.12

## 1.3.6

### Patch Changes

- Updated dependencies [[`a46a249`](https://github.com/langchain-ai/langchainjs/commit/a46a24983fd0fea649d950725a2673b3c435275f)]:
  - @langchain/core@1.1.11

## 1.3.5

### Patch Changes

- Updated dependencies [[`817fc9a`](https://github.com/langchain-ai/langchainjs/commit/817fc9a56d4699f3563a6e153b13eadf7bcc661b)]:
  - @langchain/core@1.1.10

## 1.3.4

### Patch Changes

- Updated dependencies [[`56600b9`](https://github.com/langchain-ai/langchainjs/commit/56600b94f8e185f44d4288b7a9b66c55778938dd), [`dc5c2ac`](https://github.com/langchain-ai/langchainjs/commit/dc5c2ac00f86dd2feeba9843d708926a5f38202e), [`c28d24a`](https://github.com/langchain-ai/langchainjs/commit/c28d24a8770f6d0e543cde116b0e38b3baf21301), [`bfcb87d`](https://github.com/langchain-ai/langchainjs/commit/bfcb87d23c580c7881f650960a448fe2e54a30b3)]:
  - @langchain/core@1.1.9

## 1.3.3

### Patch Changes

- Updated dependencies [[`e5063f9`](https://github.com/langchain-ai/langchainjs/commit/e5063f9c6e9989ea067dfdff39262b9e7b6aba62), [`8996647`](https://github.com/langchain-ai/langchainjs/commit/89966470e8c0b112ce4f9a326004af6a4173f9e6)]:
  - @langchain/core@1.1.8

## 1.3.2

### Patch Changes

- Updated dependencies [[`df9c42b`](https://github.com/langchain-ai/langchainjs/commit/df9c42b3ab61b85309ab47256e1d93c3188435ee), [`8d2982b`](https://github.com/langchain-ai/langchainjs/commit/8d2982bb94c0f4e4314ace3cc98a1ae87571b1ed), [`af664be`](https://github.com/langchain-ai/langchainjs/commit/af664becc0245b2315ea2f784c9a6c1d7622dbb4), [`ffb2402`](https://github.com/langchain-ai/langchainjs/commit/ffb24026cd93e58219519ee24c6e23ea57cb5bde)]:
  - @langchain/core@1.1.7

## 1.3.1

### Patch Changes

- [#9669](https://github.com/langchain-ai/langchainjs/pull/9669) [`5068787`](https://github.com/langchain-ai/langchainjs/commit/50687872ad9f8cf83f42ca6130dd603527ec5402) Thanks [@hntrl](https://github.com/hntrl)! - set empty tool array in invocation params

- Updated dependencies [[`a7b2a7d`](https://github.com/langchain-ai/langchainjs/commit/a7b2a7db5ef57df3731ae6c9931f4b663e909505), [`a496c5f`](https://github.com/langchain-ai/langchainjs/commit/a496c5fc64d94cc0809216325b0f1bfde3f92c45), [`1da1325`](https://github.com/langchain-ai/langchainjs/commit/1da1325aea044fb37af54a9de1f4ae0b9f47d4a2)]:
  - @langchain/core@1.1.6

## 1.3.0

### Minor Changes

- [#9540](https://github.com/langchain-ai/langchainjs/pull/9540) [`ece5c09`](https://github.com/langchain-ai/langchainjs/commit/ece5c09f461e6bcc93142e8f8c07316743e28d76) Thanks [@christian-bromann](https://github.com/christian-bromann)! - add named text editor tool

- [#9588](https://github.com/langchain-ai/langchainjs/pull/9588) [`e9a7adc`](https://github.com/langchain-ai/langchainjs/commit/e9a7adca29dab5f1af47bbf7492d5cdebf9675fe) Thanks [@yu-iskw](https://github.com/yu-iskw)! - Expose `ChatAnthropicInput` type for improved type safety and user experience.

  This change introduces a new exported type `ChatAnthropicInput` which is an intersection of `AnthropicInput` and `BaseChatModelParams`. This allows LangChain users to define and pass ChatAnthropic configuration options with full type safety and IntelliSense.

### Patch Changes

- [#9539](https://github.com/langchain-ai/langchainjs/pull/9539) [`12305b4`](https://github.com/langchain-ai/langchainjs/commit/12305b4327f41e60110c72d74c82e12ee27d20a5) Thanks [@christian-bromann](https://github.com/christian-bromann)! - feat(anthropic): support tool search tool

- [#9614](https://github.com/langchain-ai/langchainjs/pull/9614) [`97de9af`](https://github.com/langchain-ai/langchainjs/commit/97de9afbe7ebaffb7c0b2682a80bf1e9c2187536) Thanks [@iltenahmet](https://github.com/iltenahmet)! - fix(anthropic): Fix `.js` import issue in `chat_models.ts`

- [#9538](https://github.com/langchain-ai/langchainjs/pull/9538) [`4836f6c`](https://github.com/langchain-ai/langchainjs/commit/4836f6c48d8f04ca99c59a27d5a9bf876a6ad805) Thanks [@christian-bromann](https://github.com/christian-bromann)! - add named webfetch tool

- [#9541](https://github.com/langchain-ai/langchainjs/pull/9541) [`a0d2d6c`](https://github.com/langchain-ai/langchainjs/commit/a0d2d6cad0455e24f94282d43210030580c7d26a) Thanks [@christian-bromann](https://github.com/christian-bromann)! - add named computer use tool

- [#9541](https://github.com/langchain-ai/langchainjs/pull/9541) [`34547f5`](https://github.com/langchain-ai/langchainjs/commit/34547f5933a296a7423773e6d1fdd1022ff4936e) Thanks [@christian-bromann](https://github.com/christian-bromann)! - add named mcp toolset tool

- Updated dependencies [[`005c729`](https://github.com/langchain-ai/langchainjs/commit/005c72903bcdf090e0f4c58960c8c243481f9874), [`ab78246`](https://github.com/langchain-ai/langchainjs/commit/ab782462753e6c3ae5d55c0c251f795af32929d5), [`8cc81c7`](https://github.com/langchain-ai/langchainjs/commit/8cc81c7cee69530f7a6296c69123edbe227b2fce), [`f32e499`](https://github.com/langchain-ai/langchainjs/commit/f32e4991d0e707324e3f6af287a1ee87ab833b7e), [`a28d83d`](https://github.com/langchain-ai/langchainjs/commit/a28d83d49dd1fd31e67b52a44abc70f2cc2a2026), [`2e5ad70`](https://github.com/langchain-ai/langchainjs/commit/2e5ad70d16c1f13eaaea95336bbe2ec4a4a4954a), [`e456c66`](https://github.com/langchain-ai/langchainjs/commit/e456c661aa1ab8f1ed4a98c40616f5a13270e88e), [`1cfe603`](https://github.com/langchain-ai/langchainjs/commit/1cfe603e97d8711343ae5f1f5a75648e7bd2a16e)]:
  - @langchain/core@1.1.5

## 1.2.3

### Patch Changes

- Updated dependencies [[`0bade90`](https://github.com/langchain-ai/langchainjs/commit/0bade90ed47c7988ed86f1e695a28273c7b3df50), [`6c40d00`](https://github.com/langchain-ai/langchainjs/commit/6c40d00e926f377d249c2919549381522eac8ed1)]:
  - @langchain/core@1.1.4

## 1.2.2

### Patch Changes

- [#9520](https://github.com/langchain-ai/langchainjs/pull/9520) [`cc022b0`](https://github.com/langchain-ai/langchainjs/commit/cc022b0aab2c3959a5036b8d1b9d6ce0b547200e) Thanks [@yukukotani](https://github.com/yukukotani)! - Includes cache creation/read tokens in input_tokens of usage metadata

- Updated dependencies [[`bd2c46e`](https://github.com/langchain-ai/langchainjs/commit/bd2c46e09e661d9ac766c09e71bc6687d6fc811c), [`487378b`](https://github.com/langchain-ai/langchainjs/commit/487378bf14277659c8ca0ef06ea0f9836b818ff4), [`138e7fb`](https://github.com/langchain-ai/langchainjs/commit/138e7fb6280705457079863bedb238b16b322032)]:
  - @langchain/core@1.1.3

## 1.2.1

### Patch Changes

- Updated dependencies [[`833f578`](https://github.com/langchain-ai/langchainjs/commit/833f57834dc3aa64e4cfdd7499f865b2ab41462a)]:
  - @langchain/core@1.1.2

## 1.2.0

### Minor Changes

- [#9531](https://github.com/langchain-ai/langchainjs/pull/9531) [`38f0162`](https://github.com/langchain-ai/langchainjs/commit/38f0162b7b2db2be2c3a75ae468728adcb49fdfb) Thanks [@hntrl](https://github.com/hntrl)! - support advanced tool use

### Patch Changes

- Updated dependencies [[`636b994`](https://github.com/langchain-ai/langchainjs/commit/636b99459bf843362298866211c63a7a15c2a319), [`38f0162`](https://github.com/langchain-ai/langchainjs/commit/38f0162b7b2db2be2c3a75ae468728adcb49fdfb)]:
  - @langchain/core@1.1.1

## 1.1.3

### Patch Changes

- [#9488](https://github.com/langchain-ai/langchainjs/pull/9488) [`cfee39a`](https://github.com/langchain-ai/langchainjs/commit/cfee39a0b867e8cd4ae7bda3d64bba4124be4e10) Thanks [@hntrl](https://github.com/hntrl)! - add opus-4.5 to model strings

## 1.1.2

### Patch Changes

- [#9416](https://github.com/langchain-ai/langchainjs/pull/9416) [`0fe9beb`](https://github.com/langchain-ai/langchainjs/commit/0fe9bebee6710f719e47f913eec1ec4f638e4de4) Thanks [@hntrl](https://github.com/hntrl)! - fix 'moduleResultion: "node"' compatibility

## 1.1.1

### Patch Changes

- [#9451](https://github.com/langchain-ai/langchainjs/pull/9451) [`b1deda2`](https://github.com/langchain-ai/langchainjs/commit/b1deda21363b5a1a3f2b7bd77dc1d74764304666) Thanks [@hntrl](https://github.com/hntrl)! - fix betas being passed to client when streaming

## 1.1.0

### Minor Changes

- [#9424](https://github.com/langchain-ai/langchainjs/pull/9424) [`f17b2c9`](https://github.com/langchain-ai/langchainjs/commit/f17b2c9db047fab2d1db2d9aa791ec220cc9dd0a) Thanks [@hntrl](https://github.com/hntrl)! - add support for `betas` param

- [#9424](https://github.com/langchain-ai/langchainjs/pull/9424) [`f17b2c9`](https://github.com/langchain-ai/langchainjs/commit/f17b2c9db047fab2d1db2d9aa791ec220cc9dd0a) Thanks [@hntrl](https://github.com/hntrl)! - add support for native structured output

### Patch Changes

- [#9424](https://github.com/langchain-ai/langchainjs/pull/9424) [`f17b2c9`](https://github.com/langchain-ai/langchainjs/commit/f17b2c9db047fab2d1db2d9aa791ec220cc9dd0a) Thanks [@hntrl](https://github.com/hntrl)! - bump sdk version

## 1.0.1

### Patch Changes

- [#9387](https://github.com/langchain-ai/langchainjs/pull/9387) [`ac0d4fe`](https://github.com/langchain-ai/langchainjs/commit/ac0d4fe3807e05eb2185ae8a36da69498e6163d4) Thanks [@hntrl](https://github.com/hntrl)! - Add `ModelProfile` and `.profile` properties to ChatModel

## 1.0.0

This release updates the package for compatibility with LangChain v1.0. See the v1.0 [release notes](https://docs.langchain.com/oss/javascript/releases/langchain-v1) for details on what's new.

## 0.3.31

### Patch Changes

- 51f638e: fix content management param

## 0.3.30

### Patch Changes

- 6c7eb84: fix sonnet-4.5 thinking

## 0.3.29

### Patch Changes

- 93493ee: add support for context management
- 93493ee: add support for memory server tools
- 93493ee: add default init options for sonnet-4.5

## 0.3.28

### Patch Changes

- 9ed7dfa: fix unhandled tool choice 'none'

## 0.3.27

### Patch Changes

- 49c242c: fix opus 4.1 topP error when streaming