Data and AI releases

548 this month · 176 companies

LangChain, September 2026 new features

11 releases · 1 product

LangSmith SDK 0.14.2

- fix(js): missing OTel exports for tool name, call_id and definitions chore: increase Python and JS dependency delay to seven days feat(python): add ls.address handle for agent addressing fix(py): preserve response on wrapped HTTP errors fix(js): stub OpenAI transport in completions test fix(py,js): only the primary write replica keeps the original run ids...

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LangSmith SDK 0.14.1

- release(js): 0.10.5 ci: mirror merges to the staging repos ci: drop the push-based mirror workflow, staging pulls instead test(py): select s3_urls so list_runs and list_threads return attachments fix(py): fix missing OTel exports for tool_call_id and tool_definitions fix(py): trace ClaudeSDKClient.receive_messages() feat(sandbox): verify service URL user...

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LangSmith SDK 0.14.0

- fix(deps): patch soupsieve ReDoS vulnerabilities by John Kennedy (@jkennedyvz) in #3560 feat(sandbox): grant sandboxes delegated LangSmith access on create by Ramon Nogueira (@ramon-langchain) in #3563 feat(sandbox): LangSmith-login service URLs, and service URLs for JS by Ramon Nogueira (@ramon-langchain) in #3564 fix(py): correct broken migration-guide...

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LangSmith SDK 0.13.0

- feat(evaluate): add disable_evaluator_tracing toggle to evaluate() and aevaluate() by Sineha Manivannan (@sineha-mani) in #3547 ci(openwiki): open the update PR with gh instead of a third-party action by Thibaut Lehmann (@thibautlehmann) in #3545 refactor(sandbox): deprecate no_proxy in proxy config helpers by Ramon Nogueira (@ramon-langchain) in #3512...

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LangSmith SDK 0.12.6

- release(js): 0.10.4 by Emil F (@emil-lc) in #3542 docs: add OpenWiki, with a weekly refresh workflow by Thibaut Lehmann (@thibautlehmann) in #3541 fix(livekit): preserve system instructions with history by Caroline di Vittorio (@carolinedivittorio) in #3544 release(py): 0.12.6 by Caroline di Vittorio (@carolinedivittorio) in #3546 v0.12.5...v0.12.6

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LangSmith SDK 0.12.5

- fix: preserve sandbox API error IDs by Mukil Loganathan (@langchain-infra) in #3515 fix(js): avoid stored reasoning in OpenAI integration tests by Emil F (@emil-lc) in #3519 fix(js): update vulnerable test dependencies by Mike Merrill (@linted) in #3525 chore(deps): bump js-yaml from 3.15.1 to 4.3.1 in /js/internal/environment_tests/test-exports-metro in...

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LangSmith SDK

- release(js): 0.10.2 by Mukil Loganathan (@langchain-infra) in #3495 test(py): benchmark compressed trace ingestion by Quentin Brosse (@QuentinBrosse) in #3497 fix(py): make the multipart body replayable across both retry layers by Thibaut Lehmann (@thibautlehmann) in #3483 perf: avoid ThreadPoolExecutor churn in hybrid tracing [closes LSDK-213] by Open...

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LangSmith SDK 0.12.2

- release(js): 0.10.1 by Quentin Brosse (@QuentinBrosse) in #3477 chore(deps): bump the actions-minor-and-patch group with 4 updates by Dependabot (@dependabot) [bot] in #3465 chore(deps-dev): bump types-psutil from 7.2.2.20260518 to 7.2.2.20260827 in /python by Dependabot (@dependabot) [bot] in #3471 chore(deps): bump the py-major group in /python with 4...

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LangSmith SDK

- ci: enable CodSpeed flame graphs and pin the benchmarks to one CPU by Emil F (@emil-lc) in #3449 fix(py,js)!: make trace sampling deterministic by Emil F (@emil-lc) in #3183 fix(py): suppress import-untyped on the optional langsmith_pyo3 import by Quentin Brosse (@QuentinBrosse) in #3462 chore(py)!: swtich to httpx2 dependency while keeping httpx as a...

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