Changes since langchain-anthropic==1.7.2

release(anthropic): 1.7.3 (#40773)
chore(model-profiles): refresh anthropic model profile data (#40772)
fix(anthropic): auto-route with_structured_output to method="json_schema" for fable and opus 5.5 (#40766)
chore(anthropic): update docs for Opus 5.5 (#40765)
feat(anthropic): send mid-conversation SystemMessages in place (#40622)
chore(deps): bump anyio from 4.11.0 to 4.14.2 in /libs/partners/anthropic (#40643)

Changes since langchain-anthropic==1.7.1

release(anthropic): 1.7.2 (#40387)
fix(anthropic): preserve invalid tool use blocks (#40372)

Changes since langchain-anthropic==1.7.0

release(anthropic): 1.7.1 (#40181)
perf(anthropic,langchain): omit middleware trace inputs (#40098)
feat(anthropic): add Claude Fable 5.1 support (#40106)

Changes since langchain-anthropic==1.6.1

release(anthropic): 1.7.0 (#39963)
feat(anthropic): support top-level param for skills via container; updates thinking display mode (#39962)
feat(anthropic): support 1.0 sdk (#39938)
fix(anthropic): auto-append advisor-tool-2026-03-01 beta header for advisor_20260301 tool (#39917)
feat(anthropic): surface gateway response metadata (#39809)

Changes since langchain-anthropic==1.6.0

release(anthropic): 1.6.1 (#39804)
fix(anthropic): filter invalid tool calls from v1 content (#39803)

Changes since langchain-anthropic==1.5.6

release(anthropic): 1.6.0 (#39763)
feat(core): add standard model exception types (#39538)
fix(anthropic): exclude sibling directories from grep search scope (#39681)
chore(infra): support langsmith gateway in CI (#39651)

Changes since langchain-anthropic==1.5.5

release(anthropic): 1.5.6 (#39622) fix(anthropic): normalize tool_search_tool_result blocks (#39621) fix(anthropic): correct model profile data for Fable 5, Sonnet 5, Opus 4.1 (#39604)

Changes since langchain-anthropic==1.5.4

release(anthropic): 1.5.5 (#39597) fix(anthropic): report reasoning tokens in usage metadata (#39590) fix(anthropic): fix KeyError on rename in Claude file-tool middleware (#39293) chore(model-profiles): refresh model profile data (#39299) fix(anthropic): clearer error when no credentials are configured (#39285)

Changes since langchain-anthropic==1.5.3

release(anthropic): 1.5.4 (#39277) fix(anthropic): handle tool schemas with unsupported top-level composition (#39273) chore: bump the minor-and-patch group across 3 directories with 7 updates (#39187) fix(anthropic): preserve caller tool_choice (#39206) feat(anthropic): add user_profile_id convenience attribute (#39148)

Changes since langchain-anthropic==1.5.2

release(anthropic): 1.5.3 (#39109) fix(anthropic): preserve empty thinking field in signature_delta streaming (#38765) fix(anthropic): strip unsupported fields from system message content blocks (#39101)

Changes since langchain-anthropic==1.5.1

release(anthropic): 1.5.2 (#39056) feat(anthropic): add Claude Opus 5 support (#39054)

Changes since langchain-anthropic==1.5.0

release(anthropic): 1.5.1 (#39043) feat(anthropic,fireworks,openai): support langsmith gateway through env var (#38742) fix(anthropic): enable structured output for Claude Opus 4.8 (#39021)

Changes since langchain-anthropic==1.4.8

release(anthropic): 1.5.0 (#38985) feat(core): add reasoning_effort as a standard chat model parameter (#38887) fix(anthropic): add advisor_ prefix to builtin tool recognition (#38686) chore(deps): refresh lockfiles (#38746) chore(model-profiles): refresh model profile data (#38689) chore(model-profiles): refresh model profile data (#38663) chore: bump the minor-and-patch group across 3 directories with 11 updates (#38587) chore(anthropic): update docstring following sonnet-5 release (#38577) fix(anthropic): ignore LangSmith requests in VCR cassettes (#38547)

Changes since langchain-anthropic==1.4.7

release(anthropic): 1.4.8 (#38490) fix(anthropic): keep initial text on content_block_start (#38442) chore: bump langgraph-checkpoint from 4.1.0 to 4.1.1 in /libs/partners/anthropic (#38479) fix(core): add messages to bare raise ValueError calls (#38158)

Changes since langchain-anthropic==1.4.6

hotfix(anthropic): regenerate cassette (#38376) release(anthropic): 1.4.7 (#38373) chore: bump vcrpy from 8.1.1 to 8.2.1 in /libs/partners/anthropic (#38324) chore: bump langsmith from 0.8.5 to 0.8.18 in /libs/partners/anthropic (#38325) docs(anthropic): clarify prompt caching middleware docstring (#38206) docs: refresh README installation and resources (#38119) test(core,langchain): update tests for explicit deserialization allowlists (#38118) release(core): 1.4.7 (#38111) fix(core,partners): rename package version trace metadata (#38110)

Changes since langchain-anthropic==1.4.5

release(anthropic): 1.4.6 (#38105) fix(langchain,anthropic): confine file-search results and tighten anthropic allowed_prefixes (#38106) release(core): 1.4.6 (#38061) feat(core,partners): add package version tracking to tracing metadata (#35295) chore(infra): bump mypy to 2.1 and unify type-check config across the monorepo (#36470) feat(standard-tests): validate tool call chunks during streaming (#34707) test(anthropic): make expected warnings explicit (#38044) test(anthropic): make tests robust to gateway base URL (#38043)

Changes since langchain-anthropic==1.4.4

release(anthropic): 1.4.5 (#38036) fix(core): support content block tokens in callbacks (#34739) chore(model-profiles): refresh model profile data (#38012) hotfix(openai): min core dep (#37990) test(langchain,partners): disable pytest-benchmark under xdist to silence PytestBenchmarkWarning (#37901) chore(model-profiles): refresh model profile data (#37895) chore(model-profiles): refresh model profile data (#37771)

Changes since langchain-anthropic==1.4.3

release(anthropic): 1.4.4 (#37757) fix(anthropic): normalize cross-provider tool-call IDs (#37756) test(anthropic): retry integration tests on transient failures (#37697) chore(infra): bump langchain-tests floor to 1.1.9 (#37610) chore: bump langsmith from 0.8.3 to 0.8.5 in /libs/partners/anthropic (#37564) chore: bump idna from 3.11 to 3.15 in /libs/partners/anthropic (#37565) ci(infra): harden Dependabot version-bound preservation (#37510) chore(infra): merge v1.4 into master (#37350) chore: bump urllib3 from 2.6.3 to 2.7.0 in /libs/partners/anthropic (#37343) chore: bump requests from 2.33.0 to 2.33.1 in /libs/partners/anthropic (#37286) chore: bump langsmith from 0.7.31 to 0.8.3 in /libs/partners/anthropic (#37287) chore: bump langchain-core from 1.3.2 to 1.3.3 in /libs/partners/anthropic (#37288)

Changes since langchain-anthropic==1.4.2

release(anthropic): 1.4.3 (#37166) refactor(langchain-classic): retarget deprecations to create_agent, other chores (#37164) chore(docs): update x handle references (#37081) fix(anthropic): guard httpx finalizers (#37064)

Changes since langchain-anthropic==1.4.1

release(anthropic): 1.4.2 (#37061) fix(anthropic): restore cache_control on non-direct subclasses (#37057) hotfix: bump min core versions (#36996) feat(core): add content-block-centric streaming (v2) (#36834) hotfix(ci): remove nobenchmark flag (#36959) chore(partners): standardize integration test invocation (#36958)

Changes since langchain-anthropic==1.4.0

fix(anthropic): strip null encrypted_content from compaction blocks (#36850) release(anthropic): 1.4.1 (#36848) feat(anthropic): support opus 4.7 features (#36847) chore: bump langsmith from 0.6.3 to 0.7.31 in /libs/partners/anthropic (#36803) chore(deps): bump pytest to 9.0.3 (#36801) chore: bump langsmith from 0.6.3 to 0.7.31 in /libs/partners/anthropic (#36789) chore(model-profiles): refresh model profile data (#36482) fix(core): fixed typos in the documentation (#36459) chore: pygments>=2.20.0 across all packages (CVE-2026-4539) (#36385) feat(anthropic): support adaptive thinking mode (#36293) chore: bump requests from 2.32.5 to 2.33.0 in /libs/partners/anthropic (#36258) chore(partners): bump langchain-core min to 1.2.21 (#36183) fix(core,model-profiles): add missing ModelProfile fields, warn on schema drift (#36129) ci: suppress pytest streaming output in CI (#36092) ci: avoid unnecessary dep installs in lint targets (#36046)

Changes since langchain-anthropic==1.3.5

release(anthropic): 1.4 (#36018) feat(anthropic): AnthropicPromptCachingMiddleware: apply explicit caching to system message and tool definitions (#35969) feat(anthropic): delegate cache_control kwarg to anthropic top-level param (#35967) chore(model-profiles): refresh model profile data (#35959) chore: bump orjson from 3.11.5 to 3.11.6 in /libs/partners/anthropic (#35867)

Changes since langchain-anthropic==1.3.4

release(anthropic): 1.3.5 (#35873) fix(anthropic): Ignore general usage cache_creation fields if more specific fields are set (#35845) perf(.github): set a timeout on get min versions HTTP calls (#35851) feat(model-profiles): new fields + Makefile target (#35788) fix(anthropic): support eager_input_streaming (#35779) fix(anthropic): move _make_message_chunk_from_anthropic_event to instance method (#35670) chore: bump langgraph from 1.0.8 to 1.0.10rc1 in /libs/partners/anthropic (#35614) fix(anthropic): update integration test (#35577) fix(anthropic): drop forced tool_choice when thinking is enabled (#35544) chore: bump langgraph-checkpoint from 3.0.1 to 4.0.0 in /libs/partners/anthropic (#35450)

Changes since langchain-anthropic==1.3.3

release(anthropic): 1.3.4 (#35418) fix(anthropic): filter out common OpenAI Responses block types (#35417) fix(anthropic): update integration tests (#35396) revert: add ChatAnthropicBedrockWrapper (#35371) fix(anthropic): replace retired model IDs in tests and docstrings (#35365) feat(anthropic): add ChatAnthropicBedrock wrapper (#35091) fix(model-profiles): sort generated profiles by model ID for stable diffs (#35344) fix(anthropic): set max input tokens based on 1m context beta header (#35341) chore: bump model profiles (#35294) feat(anthropic): add User-Agent header for Anthropic API calls (#35268) chore(anthropic): add version (#35293) fix(anthropic): hoist cache_control from tool_result content sub-blocks to tool_result level (#35126) chore(deps): bump langsmith from 0.4.43 to 0.6.3 in /libs/partners/anthropic (#35150)

Changes since langchain-anthropic==1.3.2

release(anthropic): 1.3.3 (#35146) fix(anthropic): support effort="max" and remove beta headers (#35141) feat(core): add ContextOverflowError, raise in anthropic and openai (#35099) feat(model-profiles): add text_inputs and text_outputs (#35084) fix(anthropic): strip trailing whitespace from final assistant message (#35072)

Changes since langchain-anthropic==1.3.1

fix(anthropic): support output_config (#35036) chore(anthropic): update model profiles (#35039) release(anthropic): 1.3.2 (#35035) fix(anthropic): support automatic compaction (Opus 4.6) (#35034) chore: add make type target (#35015) revert: "chore: add typing target in Makefile" (#35013) chore: add typing target in Makefile (#35012) chore: enrich pyproject.toml files (#34980) chore(deps): bump the uv group across 20 directories with 3 updates (#34941) chore: upgrade urllib3 to 2.6.3 (#34940) chore: update twitter URLs (#34736) chore: ban relative imports on all packages (#34691)

Changes since langchain-anthropic==1.3.0

fix(anthropic): fix version (#34606) release(anthropic): 1.3.1 (#34605) fix(anthropic): CVE-2025-68664 (#34563) fix(anthropic): skip cache_control for code_execution blocks (#34579) fix(core): serialization patch (#34455) release(anthropic): 1.3.1 (#34337) fix(anthropic): prevent crash with cache_control and empty message content (#34025)

Changes since langchain-anthropic==1.2.0

chore(anthropic): bump min core version (#34326) release(anthropic): 1.3.0 (#34324) chore(anthropic): make test agnostic of python version (#34320) docs(anthropic): clean up docstrings (#34317) docs(anthropic): nit comments (#34314) feat(anthropic): accept TypedDict for built-in tool types (#34279) refactor(standard-tests): improve VCR config (#33968) refactor(anthropic): comments and _BUILTIN_TOOL_PREFIXES (#34305) docs(anthropic): fix line number highlighting (#34303) feat(anthropic): auto-apply mcp beta header (#34301) docs(anthropic): use named betas param in docstring example (#34300) docs(anthropic): cleanup nits (#34299) chore(anthropic): update test_tool_search cassette (#34297) fix(anthropic): ignore null values of caller on tool_use blocks (#34286) feat(anthropic): support mcp_toolset in bind_tools (#34284) feat(core,anthropic): extras on BaseTool (#34120) feat(anthropic): document and test fine grained tool streaming (#34118) feat(anthropic): use model profile for max output tokens (#34163) feat(anthropic): auto append relevant beta headers for computer use (#34117) feat(anthropic): tool search support (#34119) feat(anthropic): add effort support (#34116) chore: update core dep in lockfiles (#34216) feat(anthropic): auto append relevant beta headers (#34113) chore(anthropic): vcr integration test (#34160) docs(anthropic,core,langchain): updates (#34106) feat(langchain): support SystemMessage in create_agent's system_prompt (#34055)

Changes since langchain-anthropic==1.1.0

release: (integration packages) 1.1 (#34087) chore(docs): fix a few refs syntax errors (#34044) feat(model-profiles): distribute data across packages (#34024) fix: deprecate setattr on ModelCallRequest (#34022)

Changes since langchain-anthropic==1.0.4

release(anthropic): 1.1 (#33997) feat(anthropic): support native structured output feature and strict tool calling (#33980) style(langchain): fix some middleware ref syntax (#33988) fix(anthropic): execute bash + file tools via tool node (#33960) fix: adding missing async hooks (#33957) release(anthropic): 1.0.3 (#33935) feat(anthropic): support code_execution_20250825 (#33925) chore: update README.md files (#33919)

Changes since langchain-anthropic==1.0.3

fix: cherry picking fixes for langchain + langchain-anthropic releases (#33975)

Changes since langchain-anthropic==1.0.2

release(anthropic): 1.0.3 (#33935) feat(anthropic): support code_execution_20250825 (#33925) chore: update README.md files (#33919)

Changes since langchain-anthropic==1.0.1

release(anthropic): 1.0.2 (#33888) style: some cleanup (#33857) chore: attribute package change versions (#33854) test(anthropic): add vcr to test_search_result_tool_message (#33793) fix(standard-tests): update multimodal tests (#33781)

• Add default max token count for Sonnet 4.5.

Changes since langchain-anthropic==1.0.0

release(anthropic): 1.0.1 (#33752) fix(anthropic): clean up tests, update default model to use ID (#33751) chore: remove mentions of sonnet 3.5 (#33737) style: more refs fixes (#33730) chore: move ToolNode improvements back to langgraph (#33634) fix: links (#33691) refactor(anthropic): remove unnecessary url check (#33671) chore(anthropic): update integration test cassette (#33685) style(anthropic): use aliases for model names (#33590) chore: update pyproject.toml url entries (#33587) docs: fix Anthropic, OpenAI docstrings (#33566)

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