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langchain==1.4.1
Changes since langchain==1.4.0 release(langchain): 1.4.1 (#40498) fix(langchain): preserve open MCP object arguments (#40414) fix(langchain): correct InterruptOnConfig documentation (#40140)
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langchain-core==1.6.3
Changes since langchain-core==1.6.2 release(core): 1.6.3 (#40407) feat(core): Allow model name and provider tracing metadata override based on gateway response (#40406) test(core): cover the deprecated .text() access path (#40243) docs(core): remove stale Args/Raises entries from FileCallbackHandler._write and ChatGeneration.set_text (#40211)
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langchain-anthropic==1.7.2
Changes since langchain-anthropic==1.7.1 release(anthropic): 1.7.2 (#40387) fix(anthropic): preserve invalid tool use blocks (#40372)
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langchain-openai==1.6.2
Changes since langchain-openai==1.6.1 release(openai): 1.6.2 (#40339) fix(openai): add GPT-6 Astra reasoning efforts (#40330) chore(deps): bump httpx2 from 2.10.0 to 2.12.0 in /libs/partners/openai (#40309)
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langchain-openai==1.6.1
Changes since langchain-openai==1.6.0 fix(openai): bump max_completion_tokens in cache breakpoint integration test (#40284) release(openai): 1.6.1 (#40268) chore(model-profiles): refresh model profile data (#40217) fix(openai): support Azure AD auth with OpenAI 3.8 (#40190) feat(openai): support async tools (#40208) feat(openai): support configuration_update (#40201) chore(model-profiles): refresh…
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langchain-core==1.6.2
Changes since langchain-core==1.6.1 release(core): 1.6.2 (#40209) feat(openai): support async tools (#40208) chore(deps): bump mistune from 3.3.0 to 3.3.3 in /libs/core (#40150) chore(deps): bump tornado from 6.5.7 to 6.5.8 in /libs/core (#40113) fix(core): avoid mutation in google-genai standard content (#40023) fix(core): avoid mutation in bedrock converse standard content (#40022)
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langchain==1.4.0
Changes since langchain==1.3.18 docs(langchain): runnable langchain.mcp examples (#39976) feat(langchain): langchain.mcp namespace, MCPAdapter (#39939) perf(anthropic,langchain): omit middleware trace inputs (#40098) fix(langchain): include model destination in agent tool routing (#38355) chore(langchain): bump vcrpy test dependency minimum to >=8.2.0 (#39942)
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langchain-anthropic==1.7.1
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)
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langchain==1.4.0a4
Initial release release(langchain): 1.4.0a4 test(langchain): cover mixed-era ClientGroup and group elicitation Update libs/langchain_v1/langchain/mcp/adapter.py fix(langchain): drive MCP elicitation via member session for fastmcp 4.0.1 fix(sdk): use latest fastmcp and rm reentrant impl cr cr refactor(langchain): inline MCP client arming into __init__ refactor(langchain): stamp an arm marker instea…
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langchain==1.4.0a3
Third alpha of the 1.4.0 line. This release focuses on the new langchain.mcp namespace for adapting MCP servers into LangChain tools. langchain.mcp highlights MCPAdapter adapts any target fastmcp.Client accepts — a URL, a local script, an in-process server, an MCPConfig naming several servers, or a pre-built client — as well as a FastMCP ClientGroup for a fleet of servers behind one client. MCPAda…
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langchain==1.4.0a2
Alpha preview of langchain.mcp — a first-party adapter that turns any MCP server into LangChain tools you can hand straight to create_agent. Connection handling is FastMCP's, so its client features are available as-is rather than re-implemented behind a narrower interface. pip install "langchain[mcp]==1.4.0a2" Connect MCPAdapter takes any target fastmcp.Client accepts — transport is inferred, so t…
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langchain==1.4.0a1
Initial release fix(langchain): name the content type MCP conversion could not handle release(langchain): 1.4.0a1 test(langchain): skip MCP tests on a pydantic older than mcp supports test(langchain): drive MCP tests through FastMCP's own utilities fix(langchain/mcp): review edits (#39974) Merge remote-tracking branch 'origin/master' into sydney-runkle/langchain/simplify-mcp-adapter fix(langchain)…
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langchain-fireworks==1.6.1
Changes since langchain-fireworks==1.6.0 release(fireworks): 1.6.1 (#39975) fix(fireworks): drop reasoning history blocks (#39973) chore(model-profiles): refresh model profile data (#39844)
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langchain-core==1.6.1
Changes since langchain-core==1.6.0 revert: release(core): 1.6.2 (#39971) release(core): 1.6.2 (#39967) fix(core): shore up indexing in genai v1 streaming content (#39964) fix(core): make StructuredTool JSON-serializable (#39631) chore(deps): bump minor and patch dependencies (#39869) release(core): 1.6.1 (#39832) feat(core): propagate gateway information on error path (#39829)
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langchain==1.3.18
Changes since langchain==1.3.17 release(langchain): 1.3.18 (#39966) fix(langchain): preserve content-block shape in PIIMiddleware redaction (#39894) fix(core): shore up indexing in genai v1 streaming content (#39964)
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langchain-anthropic==1.7.0
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)
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langchain==1.3.17
Changes since langchain==1.3.16 release(langchain): 1.3.17 (#39893) fix(langchain): frame custom HITL rejection reasons (#39773) chore(deps): bump minor and patch dependencies (#39869)
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langchain-perplexity==1.4.1
Changes since langchain-perplexity==1.4.0 release(perplexity): 1.4.1 (#39826) fix(perplexity): include type="message" on Responses input items (#39774) fix(perplexity): preserve caller extra_body (#39203) chore: bump pillow from 12.2.0 to 12.3.0 in /libs/partners/perplexity (#38991) chore(deps): refresh lockfiles (#38746) fix(perplexity): use supported Responses API model (#38337) chore: bump vcrp…
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langchain-fireworks==1.6.0
Changes since langchain-fireworks==1.5.2 release(fireworks): 1.6.0 (#39810) feat(fireworks): add document reranking (#39732) fix(fireworks): filter invalid tool calls from v1 content (#39805) feat(core): add standard model exception types (#39538) chore(model-profiles): refresh model profile data (#39646) fix(fireworks): avoid repeated service_tier [closes #39619] (#39620) chore: bump langsmith fr…
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langchain==1.3.16
Changes since langchain==1.3.15 release(langchain): 1.3.16 (#39806) feat(core): add standard model exception types (#39538) feat(langchain): support custom token_counter in ContextEditingMiddleware (#39754) fix(langchain): re-raise non-retryable exceptions in ModelRetryMiddleware (#38960) chore(langchain): update docs on error handling for json schema (#39632) fix(langchain): preserve final repeat…
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langchain-anthropic==1.6.1
Changes since langchain-anthropic==1.6.0 release(anthropic): 1.6.1 (#39804) fix(anthropic): filter invalid tool calls from v1 content (#39803)
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langchain-openai==1.6.0
Changes since langchain-openai==1.5.2 release(openai): 1.6.0 (#39762) feat(core): add standard model exception types (#39538) fix(openai): raise clear error on unexpected response type in _create_chat_result (#39731)
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langchain-anthropic==1.6.0
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)
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langchain-core==1.6.0
Changes since langchain-core==1.5.6 release(core): 1.6.0 (#39760) fix(core): resolve postponed annotations in StructuredTool._injected_args_keys (#39602) feat(core): add standard model exception types (#39538) fix(core): allow deserializing RunnablePick (#39753) fix(core): make convert_to_openai_function handle callables and non-dict mappings (#39750) fix(core): make subprocess and temporary file…
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langchain-openai==1.5.2
Changes since langchain-openai==1.5.1 release(openai): 1.5.2 (#39719) fix(openai): preserve reasoning item boundaries (#39278) release(openai): 1.5.2a1 (#39709) feat(openai): extract gateway metadata from response headers when available (#39706) chore(openai): update snapshots (#39657) fix(openai): support o-series models in get_num_tokens_from_messages (#38710)
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langchain-openai==1.5.2a1
Initial release release(openai): 1.5.2a1 (#39709) feat(openai): extract gateway metadata from response headers when available (#39706) chore(openai): update snapshots (#39657) fix(openai): support o-series models in get_num_tokens_from_messages (#38710) release(openai): 1.5.1 (#39653) fix(openai): preserve streamed encrypted reasoning (#39635) chore(infra): support langsmith gateway in CI (#39651)…
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langchain-core==1.5.6
Changes since langchain-core==1.5.5 chore(core): release 1.5.6 (#39704) feat(core): incorporate gateway metadata to traces (#39703)
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langchain-openrouter==0.2.8
Changes since langchain-openrouter==0.2.7 release(openrouter): 0.2.8 (#39658) chore(model-profiles): refresh model profile data (#39646) chore(model-profiles): refresh model profile data (#39625) fix(openrouter): preserve cost metadata in usage chunks (#39338) chore(model-profiles): refresh model profile data (#39609) chore(model-profiles): refresh model profile data (#39579) chore(model-profiles)…
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langchain-core==1.5.5
Changes since langchain-core==1.5.4 release(core): 1.5.5 (#39655) fix(core): make abatch_iterate consistent with batch_iterate for None and zero size (#39367) fix(core): respect pydantic aliases when validating tool inputs (#39572) fix(core): issues in merging chunks (#39535) fix(core): handle v1 base model validation in async path (#39576) fix(core): handle tool descriptions for infer_schema=Fals…
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langchain-openai==1.5.1
Changes since langchain-openai==1.5.0 release(openai): 1.5.1 (#39653) fix(openai): preserve streamed encrypted reasoning (#39635) chore(infra): support langsmith gateway in CI (#39651)