LangChain (Python)

Changes since langchain-core==1.2.17

release(core): 1.2.18 (#35704) fix(core): fix double backticks in deprecation docstring for alternative_import (#35658) fix(core): preserve default_factory when generating tool call schema (#35550) feat(openai): support tool search (#35582) chore: bump the minor-and-patch group across 3 directories with 7 updates (#35605)

Changes since langchain==0.3.27

fix(langchain): bump minimum langchain-core to 0.3.73 (#35608) release(langchain): 0.3.28 (#35607) fix(langchain): backport patch ReDoS vulnerability in MRKL and ReAct action regex (CVE-2024-58340) (#35603) feat(core,langchain,text-splitters): (v0.3) use uuid7 for run ids (#34732) fix(core): serialization patch (#34458) feat(openai): enable stream_usage when using default base URL and client (#33296) fix(langchain): handle gpt-5 model name in init_chat_model (#33148) fix(langchain): add context_management to Anthropic chat model init (#33150) docs: more standardization (#33124) refactor(langchain): resolve pydantic deprecation warnings (#33125) docs: standardize .. code-block directive usage (#33122) chore: bump ruff version to 0.13 (#33043) fix: update method calls from dict to model_dump in Chain (#33035) chore: update pyproject.toml files, remove codespell (#33028) chore(langchain): drop cap on python version (#32974) chore: restore commented out optional deps (#32971) docs(langchain): add docstring for _load_map_reduce_chain (#32961) docs(langchain): add docstring for _load_stuff_chain (#32932) revert: "chore: remove ruff target-version" (#32895) fix(openai): ainvoke uses async _aget_response; add async tests (#32459) chore: remove ruff target-version (#32880) chore(langchain): enable ruff docstring-code-format in langchain (#32858) chore(langchain): add ruff rule BLE (#32868) chore(docs): update package READMEs (#32869) chore(langchain): add ruff rule ERA (#32867) fix(langchain): preserve supplied llm in FlareChain.from_llm (#32847) chore(langchain): add ruff rules D (except D100 and D104) (#31994) chore(langchain): add ruff rules N (#32098) chore(langchain): improve PostgreSQL Manager upsert SQLAlchemy API calls. (#32748) chore: adress pytest-asyncio deprecation warnings + other nits (#32696) chore(langchain): add mypy pydantic plugin (#32610) chore: update references to use the latest version of Claude-3.5 Sonnet (#32594) chore(langchain): add mypy warn_unreachable setting (#32529) docs: update outdated README.md content (#32540) fix(tests): add anthropic_proxy to configurable test parameters chore(langchain): select ALL rules with exclusions (#31930) feat: port various nit changes from wip-v0.4 (#32506) chore: formatting across codebase (#32466) feat(openai): minimal and verbosity (#32455) fix: use new Google model names in examples (#32288) fix: update bar_model to use the correct model version claude-3-7-sonnet-20250219 (#32284) refactor: remove references to unsupported model claude-3-sonnet-20240229 (#32281) fix(core): track within-batch deduplication in indexing num_skipped count (#32273) fix: formatting issues in docstrings (#32265) fix: devcontainer (#32260) chore(langchain): add ruff rules ARG (#32110) chore(langchain): add ruff rules TC (#31921) feat(docs): improve devx, fix Makefile targets (#32237) chore(langchain): add ruff rules D1 (except D100 and D104) (#32123) chore(langchain): add ruff rules SLF (#32112) chore(langchain): strip_ansi fucntion to remove ANSI escape sequences (#32200) fix(docs): capitalization, codeblock formatting, and hyperlinks, note blocks (#32235) refactor(langchain): refactor unit test stub classes (#32209)

Changes since langchain-classic==1.0.1

release(langchain): bump langchain-classic to 1.0.2 (#35601) fix(langchain-classic): patch ReDoS vulnerability in MRKL and ReAct action regex (CVE-2024-58340) (#35598) chore: bump the langchain-deps group across 3 directories with 7 updates (#35513) chore: bump the langchain-deps group across 3 directories with 14 updates (#35441) chore: bump google-cloud-aiplatform from 1.117.0 to 1.133.0 in /libs/langchain (#35392) docs: fix docstring inaccuracies and update outdated LangSmith URLs (#35283) feat(openai): support automatic server-side compaction (#35212) chore: bump langchainhub from 0.1.18 to 0.1.21 in /libs/langchain in the langchain-deps group across 1 directory (#35280) chore: bump the langchain-deps group across 3 directories with 8 updates (#35257) style: bump ruff version to 0.15 (#35042) docs(langchain-classic): clarify MultiVectorRetriever usage (#35053) fix(langchain-classic): validate ensemble retriever weights (#35078) chore(deps): bump pillow from 11.3.0 to 12.1.1 in /libs/langchain (#35175) chore(deps): bump cryptography from 46.0.1 to 46.0.5 in /libs/langchain (#35147) chore(deps): bump the langchain-deps group across 3 directories with 40 updates (#35129) chore(deps): bump the langchain-deps group across 3 directories with 11 updates (#35121) docs(langchain-classic): warn about older create_react_agent (#35052) docs(langchain-classic): add warning for initialize_agent function (#35051) feat: support state updates from wrap_model_call with command(s) (#35033) 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) refactor: replace print with logger.info in llm_summarization_checker (#34903) fix(langchain): fix typo 'safegaurd' -> 'safeguard' (#34789) chore(deps): bump langgraph-checkpoint from 2.1.2 to 3.0.0 in /libs/cli in the uv group across 1 directory (#34787) chore(deps): bump the uv group across 5 directories with 5 updates (#34785) chore(deps): bump the uv group across 3 directories with 1 update (#34741) chore: update twitter URLs (#34736) test(langchain): delete ontotext graphdb test (#34710) fix(core): make yield_keys prefix keyword-only to match BaseStore (#34659) chore: ban relative imports on all packages (#34691) style: bump ruff version to 0.14.11 (#34674) fix(langchain,langchain-classic): more descriptive error msg when dep is not installed (#34679) fix(langchain): correct typo 'langchain experiment' to 'langchain_experimental' in error messages (#34608) fix(infra): use langchain_v1 for dev container deps (#34534) chore(deps): bump mypy to v1.19 and ruff to v1.14 (#34521) chore(langchain-classic): bump markupsafe lock for python 3.14 (#34523) fix(langchain-classic): pass default to config.getoption (#34034) style(core): fix mypy no-any-return violations (#34204)

Changes since langchain-openrouter==0.0.2

fix(openrouter): include role in sdk model_construct for min dep compat (#35562) release(openrouter): 0.1.0 (#35560) feat(openrouter): add streaming token usage support (#35559) feat(fireworks,groq,openrouter): add standard model property (#35542) feat(openrouter): surface cost and cost_details in response_metadata (#35461) chore(model-profiles): refresh model profile data (#35477) feat(openrouter): default headers (#35369) fix(model-profiles): sort generated profiles by model ID for stable diffs (#35344) chore: bump model profiles (#35294) fix(infra): create GitHub releases for partner package releases (#35234)

Changes since langchain-core==1.2.16

release(core): 1.2.17 (#35527) fix(core): extract usage metadata from serialized tracer message outputs (#35526) chore: bump the langchain-deps group across 3 directories with 7 updates (#35513) chore: bump the langchain-deps group across 3 directories with 14 updates (#35441)

Changes since langchain-huggingface==1.2.0

fix(huggingface): switch integration test provider to together (#35525) fix(huggingface): resolve huggingface-hub 1.x compat (#35524) fix(huggingface): bump transformers and sentence-transformers lower bounds (#35522) chore: bump langgraph-checkpoint from 3.0.0 to 4.0.0 in /libs/partners/huggingface (#35447) fix(model-profiles): sort generated profiles by model ID for stable diffs (#35344) chore: bump model profiles (#35294) release(huggingface): 1.2.1 (#35182) chore(huggingface): version bump for huggingface-hub and transformers deps (#35061) chore(deps): bump pillow from 11.3.0 to 12.1.1 in /libs/partners/huggingface (#35179) chore(deps): bump langsmith from 0.4.32rc0 to 0.6.3 in /libs/partners/huggingface (#35152) feat(model-profiles): add text_inputs and text_outputs (#35084) 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) docs: add missing module-level docstrings to partner integrations (#34838) chore(deps): bump the uv group across 8 directories with 6 updates (#34773) chore: update twitter URLs (#34736) chore: ban relative imports on all packages (#34691)

Changes since langchain-core==1.2.15

release(core): 1.2.16 (#35439) fix(core): treat empty tool chunk ids as missing in merge (#35414)

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-core==1.2.14

fix(core): improve error message for non-JSON-serializable tool schemas (#34376) fix(core): improve typing/docs for on_chat_model_start to clarify required positional args (#35324) perf(core): defer specific langsmith imports to reduce import time (#35298) revert: add ChatAnthropicBedrockWrapper (#35371) release(core): 1.2.15 (#35367) fix(anthropic): replace retired model IDs in tests and docstrings (#35365) feat(anthropic): add ChatAnthropicBedrock wrapper (#35091) style: fix some ruff noqa (#35321)

Changes since langchain-core==1.2.13

release(core): 1.2.14 (#35328) chore(core): remove langserve from sys info util, add deepagents (#35325) fix(core): fix merge_lists incorrectly merging parallel tool calls (#35281) fix(core): accept int temperature in _get_ls_params for LangSmith tracing (#35302) revert: accept integer temperature values in _get_ls_params (#35319) fix(core): accept integer temperature values in _get_ls_params (#35317) docs(core): update load note to be precise (#35309) fix(core): prevent recursion error when args_schema is dict (#35260) fix(core): preserve index and timestamp fields when merging (#34731) docs(core): add security warnings and best practices for deserialization (#35282) docs: fix docstring inaccuracies and update outdated LangSmith URLs (#35283) fix(core): correct misleading jinja2 sandboxing comment (#35183) chore: bump the langchain-deps group across 3 directories with 8 updates (#35257)

Changes since langchain-text-splitters==1.1.0

release(text-splitters): 1.1.1 (#35318) fix(text-splitters): prevent JSFrameworkTextSplitter from mutating self._separators on each split_text() call (#35316) chore: bump transformers from 5.1.0 to 5.2.0 in /libs/text-splitters in the other-deps group across 1 directory (#35279) chore: bump the other-deps group across 3 directories with 2 updates (#35255) style: bump ruff version to 0.15 (#35042) fix: Server-Side Request Forgery (SSRF) in HTMLHeaderTextSplitter.split_text_from_url (#35196) feat(text-splitters): add model_kwargs to SentenceTransformersTokenTextSplitter (#35113) chore(deps): bump langsmith from 0.4.31 to 0.6.3 in /libs/text-splitters (#35162) chore(deps): bump the other-deps group across 3 directories with 12 updates (#35127) chore(deps): bump the other-deps group across 3 directories with 8 updates (#35120) chore: add make type target (#35015) revert: "chore: add typing target in Makefile" (#35013) chore: add typing target in Makefile (#35012) fix(text-splitters): reverse preserved elements iterator in HTMLSemanticPreservingSplitter (#34080) 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) style(text-splitters): lint (#34865) fix(text-splitters): fix typo 'seperator' -> 'separator' in test docs… (#34857) chore(deps): bump the uv group across 8 directories with 6 updates (#34773) chore(deps): bump the uv group across 3 directories with 1 update (#34741) chore: update twitter URLs (#34736) style(text-splitters): fix some ruff preview rules (#34665) chore: ban relative imports on all packages (#34691) style: bump ruff version to 0.14.11 (#34674) test(text-splitters): add edge case tests for CharacterTextSplitter (#34628) fix(text-splitters): HTMLSemanticPreservingSplitter nested preserved … (#34587) chore(deps): bump mypy to v1.19 and ruff to v1.14 (#34521) chore(text-splitters): bump dependency locks for python 3.14 (#34522) style(text-splitters,standard-tests,cli): add ruff TC and RUF012 rules (#34495) style: add ruff ISC001 rule (#34493) release(core): 1.2.3 (#34421) feat(infra): add CI check for out of date lockfiles (#34397)

Changes since langchain-tests==1.1.4

chore: bump the other-deps group across 3 directories with 2 updates (#35255) style: bump ruff version to 0.15 (#35042) chore(deps): bump langsmith from 0.4.56 to 0.6.3 in /libs/standard-tests (#35157) release(standard-tests): release 1.1.5 (#35139) chore(deps): bump the other-deps group across 3 directories with 12 updates (#35127) chore(deps): bump the other-deps group across 3 directories with 8 updates (#35120) chore(standard-tests): test suite for sandbox only (#35111)

Changes since langchain-openai==1.1.9

release(openai): 1.1.10 (#35292) feat(openai): support automatic server-side compaction (#35212) fix(openai): add model property (#35284) fix(nomic,openai,perplexity): update pillow version to >= 12.1.1, <13.0.0 (#35254) docs(openai): more nits (#35277) docs(openai): clarify reasoning config for openai-compatible endpoints (#35202) fix(openai): gpt-5.2-pro Model Profile structured_output key fixed (#35216) chore(openai): extend model_token_mapping till gpt-5.2 for modelname_to_contextsize (#35214) fix(openai): enhance error message for non-OpenAI embedding providers (#35252) fix(openai): sanitize chat completions text content blocks (#35217) fix(openai): improve error message for null choices in OpenAI-compatible APIs (#35236) feat(openrouter): add langchain-openrouter provider package (#35211) chore: bump pillow from 11.3.0 to 12.1.1 in /libs/partners/openai (#35177) chore(deps): bump langsmith from 0.4.37 to 0.6.3 in /libs/partners/openai (#35151)

Changes since langchain-openrouter==0.0.1

chore(openrouter): bump core ver, silence warning (#35231)

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-openai==1.1.8

release(openai): 1.1.9 (#35145) fix(openai): sanitize urls when counting tokens in images (#35143) feat(core): add ContextOverflowError, raise in anthropic and openai (#35099) feat(model-profiles): add text_inputs and text_outputs (#35084)

Changes since langchain-openai==1.1.7

release(openai): 1.1.8 (#35097) fix(openai): detect codex models for responses api preference (#35058) 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(openai): update model profiles (#34960) chore: upgrade urllib3 to 2.6.3 (#34940) chore(deps): bump the uv group across 8 directories with 6 updates (#34773) chore: update twitter URLs (#34736) chore: ban relative imports on all packages (#34691) chore(openai): delete outdated test (#34682)

Changes since langchain-standard-tests==1.1.3

release(standard-tests): release 1.1.4 (#35048) chore(standard-tests): bump down to 1.1.3 (#35040) release(standard-tests): release standard tests with sandbox provider (#35032) feat(standard-tests): add standard tests for sandbox providers (#35018) 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)

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-groq==1.1.1

release(groq): 1.1.2 (#34977) feat(groq): support lc image types (#34845) 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) chore(groq): document vision support (#34620) fix(core): serialization patch (#34455)