Original release notes
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) release(openai): 1.5.0 (#39629) feat(openai): support openai 3.0 SDK (#39613) chore(partners): bump langgraph floor in openai and huggingface lockfiles (#39617) release(openai): 1.4.3 (#39485) fix(openai): filter invalid tool calls from content (#39366) chore(openai): update guidance for responses API for OpenAI-compatible providers (#39327) chore(openai): update docstring for include_response_headers (#39326) release(openai): 1.4.2 (#39322) fix(openai): handle ContextWindowExceededError (#39300) chore: bump the minor-and-patch group across 3 directories with 7 updates (#39187) fix(openai): filter langchain-generated content block IDs (#39209) fix(openai): preserve Responses text options (#39204) fix(openai): redact MCP authorization (#39155) chore(model-profiles): refresh model profile data (#39050) release(openai): 1.4.1 (#39045) feat(anthropic,fireworks,openai): support langsmith gateway through env var (#38742) fix(openai): correct gpt-5.3-chat-latest profile (#39009) release(openai): 1.4.0 (#38983) chore: bump pillow from 12.2.0 to 12.3.0 in /libs/partners/openai (#38999) feat(core): add reasoning_effort as a standard chat model parameter (#38887) chore(model-profiles): refresh model profile data (#38797) release(openai): 1.3.5 (#38785) feat(openai): support explicit prompt caching (#38762) chore(model-profiles): refresh model profile data (#38774) release(openai): 1.3.4 (#38731) fix(openai): suppress Pydantic serializer warning on structured output parsed field (#37727) test(openai): skip Codex VCR tests before cassette setup (#38690) chore: bump the minor-and-patch group across 3 directories with 11 updates (#38587) chore: bump langgraph-checkpoint from 4.1.0 to 4.1.1 in /libs/partners/openai (#38476) fix(core): use asyncio.get_running_loop() in async contexts (#38157) test(openai): clarify async API key sync failure trace (#38379) release(openai): 1.3.3 (#38375) fix(openai): drop response item ids when store is false (#38372) fix(langchain,openai): only set strict=True on tools for OpenAI-compatible models in ProviderStrategy (#38370) test(openai): clarify expected strict schema error (#38338) fix(openai): drop stop from Responses API payload (#38336) chore: bump langsmith from 0.8.5 to 0.8.18 in /libs/partners/openai (#38293) chore: bump vcrpy from 8.1.1 to 8.2.1 in /libs/partners/openai (#38294) chore(model-profiles): refresh model profile data (#38274) test(openai): vcr embedding raw equivalence tests (#38199) release(openai): 1.3.2 (#38130) fix(openai): build Codex async headers off the event loop in _agenerate (#38129) fix(openai): avoid sync token reads in Codex streaming (#38128) hotfix(openai): skip Codex live integration tests in CI (#38124) hotfix(openai): switch version (#38123) refactor(openai): mark Codex OAuth classes private (#38122) release(openai): 1.4.0 (#38120) feat(openai): add ChatGPT OAuth-backed ChatOpenAICodex chat model (#37569) 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) style(core,langchain,langchain-classic,partners): replace double backticks in docstrings (#38095) test(openai): use gpt-4o for image token counting (#38089) release(core): 1.4.6 (#38061) feat(core,partners): add package version tracking to tracing metadata (#35295) fix(core,openai): normalize v1 streamed tool calls (#35983) 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) fix(langchain): tighten structured output model fallbacks (#38042) hotfix(openai): min core dep (#37990) release(openai): 1.3.0 (#37989) feat(openai): support apply_patch built-in tool (#37157) chore(model-profiles): refresh model profile data (#37973) test(langchain,partners): disable pytest-benchmark under xdist to silence PytestBenchmarkWarning (#37901) chore(model-profiles): refresh model profile data (#37895) release(openai): 1.2.2 (#37617) chore(infra): bump langchain-tests floor to 1.1.9 (#37610) test(openai): unbreak audio chat and Azure embedding integration tests (#37589) fix(openai): guard httpx finalizers (#37570) chore: bump langsmith from 0.8.4 to 0.8.5 in /libs/partners/openai (#37549) chore: bump idna from 3.11 to 3.15 in /libs/partners/openai (#37548) ci(infra): harden Dependabot version-bound preservation (#37510) test(standard-tests): assert ls_model_name honors per-call model override (#37504) fix(openai): source LLM context size from model profiles (#37489) chore(core,langchain,openai): refresh stale OpenAI model references (#37487) fix(openai): broaden condition for ContextOverflowError to accommodate other providers (#37457) docs(openai): document base_url env var fallback chain (#37436) chore: bump langsmith from 0.8.0 to 0.8.4 in /libs/partners/openai (#37416) chore: bump langsmith from 0.7.31 to 0.8.0 in /libs/partners/openai (#37398) chore(infra): merge v1.4 into master (#37350) chore: bump urllib3 from 2.6.3 to 2.7.0 in /libs/partners/openai (#37330) chore: bump langchain-core from 1.3.2 to 1.3.3 in /libs/partners/openai (#37266) chore(docs): update x handle references (#37081) chore(model-profiles): refresh model profile data (#37074) chore(docs): update comment for chatopenai (#37034) chore(model-profiles): refresh model profile data (#37015) hotfix: bump min core versions (#36996) release(openai): 1.2.1 (#36995) fix(openai): add gpt-5.5 pro to Responses API check (#36994) feat(core): add content-block-centric streaming (v2) (#36834) chore(model-profiles): refresh model profile data (#36982) release(openai): 1.2.0 (#36961) feat(openai): prevent silent streaming hangs in ChatOpenAI (#36949) hotfix(ci): remove nobenchmark flag (#36959) chore(partners): standardize integration test invocation (#36958) release(openai): 1.1.16 (#36927) fix(openai): tolerate prompt_cache_retention drift in streaming (#36925) release(openai): 1.1.15 (#36901) fix(openai): accommodate dict response items in streaming (#36899) fix(openai): infer azure chat profiles from model name (#36858) chore(model-profiles): refresh model profile data (#36864) release(openai): 1.1.14 (#36820) fix(openai): use SSRF-safe transport for image token counting (#36819) chore(deps): bump pytest to 9.0.3 (#36801) chore: bump langsmith from 0.6.3 to 0.7.31 in /libs/partners/openai (#36795) chore: bump pillow from 12.1.1 to 12.2.0 in /libs/partners/openai (#36777) release(openai): 1.1.13 (#36729) fix(openai): handle content blocks without type key in responses api conversion (#36725) chore(model-profiles): refresh model profile data (#36539) chore(openai): fix broken vcr cassette playback and add ci guard (#36502) fix(openai,groq,openrouter): use is-not-None checks in usage metadata token extraction (#36500) fix(core): fixed typos in the documentation (#36459) chore(model-profiles): refresh model profile data (#36455) feat(core): impute placeholder filenames for OpenAI file inputs (#36433) chore: pygments>=2.20.0 across all packages (CVE-2026-4539) (#36385) chore(model-profiles): refresh model profile data (#36368) fix(openai): update computer call test (#36352) fix(openai): let user-provided User-Agent override the Azure default (#35523) chore: bump requests from 2.32.5 to 2.33.0 in /libs/partners/openai (#36248) fix(openai): bump min core version (#36180) release(openai): 1.1.12 (#36178) fix(core,model-profiles): add missing ModelProfile fields, warn on schema drift (#36129) fix(openai): support phase parameter (#36161) fix(openai): preserve namespace field in streaming function_call chunks (#36108) ci: suppress pytest streaming output in CI (#36092) ci: avoid unnecessary dep installs in lint targets (#36046) chore(model-profiles): refresh model profile data (#36039) chore: bump orjson from 3.11.5 to 3.11.6 in /libs/partners/openai (#35860) fix(openai): add type: message to Responses API input items (#35693) perf(.github): set a timeout on get min versions HTTP calls (#35851) feat(model-profiles): new fields + Makefile target (#35788) fix(openai): close PIL Image handles in token counting to prevent fd leak (#35742) fix(openai): typo (#35763) chore(model-profiles): refresh model profile data (#35754) fix(openai): bump min core version (#35705) release(openai): 1.1.11 (#35703) fix(openai): update responses API model detection for pro and codex models (#35594) feat(openai): support tool search (#35582) chore: bump langgraph from 1.0.8 to 1.0.10rc1 in /libs/partners/openai (#35612) chore(model-profiles): refresh model profile data (#35593) fix(openai): avoid PydanticSerializationUnexpectedValue for structured output (#35543) feat(openrouter): add streaming token usage support (#35559) fix: compaction typo (#35467) fix(openai): add test for CSV and accommodate breaking changes in file url inputs (#35454) chore: bump langgraph-checkpoint from 3.0.0 to 4.0.0 in /libs/partners/openai (#35448) fix(model-profiles): sort generated profiles by model ID for stable diffs (#35344) fix(openai): accept valid responses that are falsy at runtime (#35307) 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) 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) 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) release(openai): 1.1.7 (#34640) fix(openai): raise proper exception OpenAIRefusalError on structured output refusal (#34619) fix: handle empty assistant content in Responses API (#34272) (#34296) fix(core): serialization patch (#34455) fix(openai): handle function_call content in token counting (#34379) fix(openai): filter function_call blocks in token counting (#34396) release(openai): 1.1.6: update max input tokens for gpt-5 series (#34419) release(openai): 1.1.5 (#34409) fix(openai): rely on langchain-core for setting chunk_position (#34404) release(openai): 1.1.4 (#34395) revert(openai): switch model from nano to mini when using flex (#34394) fix(openai): Correct hyperlinks in documentation of function with_structured_output (#34385) test(openai): switch model from nano to mini when using flex (#34336) revert: make integration tests output verbose (#34329) chore(infra,openai): make integration tests output verbose (#34327) release(openai): 1.1.3 (#34325) fix(openai): correct image resize aspect ratio caps (#34192) refactor(standard-tests): improve VCR config (#33968) feat(openai): Use responses API if model is gpt-5.2-pro (#34306) fix(openai): handle missing 'text' key in responses API content blocks (#34198) release(openai): 1.1.2 (#34302) fix(openai): Allow temperature when reasoning is set to the string 'none' (#34298) feat(langchain,openai): add strict flag to ProviderStrategy structured output (#34149) docs(fireworks,groq,huggingface,mistralai,ollama,openai): x-ref convert_to_openai_tool (#34276) fix(openai): add missing tools param to ChatOpenAI with_structured_output (#34075) release(openai): 1.1.1 (#34252) fix(openai): Fixing error that comes up using the Responses API with built-in tools and custom tools (#34136) docs(core,groq,openai): nits for ref docs (#34243) test(openai): mark test_structured_output_and_tools flaky (#34223) chore: update core dep in lockfiles (#34216) release: (integration packages) 1.1 (#34087) fix(openai): make GPT-5 temperature validation case-insensitive (#34012) style(core,langchain-classic,openai): fix griffe warnings (#34074) chore(docs): fix a few refs syntax errors (#34044) feat(model-profiles): distribute data across packages (#34024) chore(openai): skip Azure text completions tests (#34021) style(langchain): fix some middleware ref syntax (#33988) release(openai): 1.0.3 (#33981) refactor(openai): embedding utils and calculations (#33982) fix(openai): Respect 300k token limit for embeddings API requests (#33668)
