# langchain

> The agent engineering platform

- **URL**: https://www.freshcrate.ai/projects/langchain
- **Author**: langchain-ai
- **Category**: Frameworks
- **Latest version**: `langchain-core==1.4.1` (2026-06-05)
- **License**: MIT
- **Source**: https://github.com/langchain-ai/langchain
- **Homepage**: https://docs.langchain.com/langchain/
- **Language**: Python
- **GitHub**: 134,390 stars, 22,198 forks
- **Registry**: github
- **Tags**: `agents`, `ai`, `ai-agents`, `anthropic`, `chatgpt`, `deepagents`, `enterprise`, `framework`, `python`

## Description

The agent engineering platform

## Recent releases

| Version | Date | Urgency | Changes |
| --- | --- | --- | --- |
| `langchain-core==1.4.1` | 2026-06-05 | High | Changes since langchain-core==1.4.0  release(core): 1.4.1 (#37922) fix(core): remove Bedrock prevalidation from `load` (#37909) docs(core): expand and link `ModelProfile` docstrings (#37904) release(anthropic): 1.4.4 (#37757) chore(core): bump `uuid-utils` to 0.16.0 (#37699) chore(infra): bump `langchain-tests` floor to 1.1.9 (#37610) release(standard-tests): 1.1.9 (#37609) chore: bump idna from 3.11 to 3.15 in /libs/core (#37539) ci(infra): harden Dependabot version-bound preservation (#37510) |
| `langchain-core==1.4.0` | 2026-05-11 | High | Changes since langchain-core==0.3.86  chore(infra): merge v1.4 into master (#37350) chore: bump urllib3 from 2.6.3 to 2.7.0 in /libs/core (#37329) fix(core): avoid eager `pydantic.v1` import in `@deprecated` (#37308) chore: bump mistune from 3.1.4 to 3.2.1 in /libs/core (#37237) chore: bump jupyter-server from 2.17.0 to 2.18.0 in /libs/core (#37204) release(core): 1.3.3 (#37198) fix(core): set deprecation `since` to 1.3.3 to match release (#37200) fix(core, langchain): harden `load()` against un |
| `langchain-core==0.3.86` | 2026-05-07 | High | Changes since langchain-core==0.3.85  release(core): 0.3.86 (#37242) fix(core): backport path-traversal fix to v0.3 (CVE-2026-34070, GHSA-qh6h-p6c9-ff54) (#37233) |
| `langchain-core==1.4.0a2` | 2026-05-01 | High | Initial release  release(core): 1.4.0a2 (#37134) refactor(core): unwind _AsyncEventsResult hybrid for astream_events (#37133) release(core): 1.4.0a1 (#37132) Merge remote-tracking branch 'origin/master' into v1.4 feat(core): stream_events(version='v3') protocol (#37111) fix(core): preserve structured `inputs` on tool runs in tracers (#37108) release(perplexity): 1.2.0 (#37091) chore(docs): update x handle references (#37081) fix(core): make `removal` optional in `warn_deprecated` (#37056) fix(co |
| `langchain-core==1.3.2` | 2026-04-24 | High | Changes since langchain-core==1.3.1  release(core): 1.3.2 (#36990) feat(core): add content-block-centric streaming (v2) (#36834) |
| `langchain-core==1.3.1` | 2026-04-23 | High | Changes since langchain-core==1.3.0  release(core): 1.3.1 (#36972) feat(core): allow _format_output to pass through list of ToolOutputMixin instances (#36963) chore: bump nbconvert from 7.17.0 to 7.17.1 in /libs/core (#36923) feat(core): Update inheritance behavior for tracer metadata for special keys (#36900) chore: bump langsmith from 0.7.13 to 0.7.31 in /libs/core (#36813) |
| `langchain-openai==1.1.16` | 2026-04-21 | High | Changes since langchain-openai==1.1.15  release(openai): 1.1.16 (#36927) fix(openai): tolerate `prompt_cache_retention` drift in streaming (#36925) |
| `langchain-openai==1.1.15` | 2026-04-20 | High | Changes since langchain-openai==1.1.14  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) |
| `langchain-core==1.3.0` | 2026-04-17 | High | Changes since langchain-core==1.2.31  release(core): release 1.3.0 (#36851) release(core): 1.3.0a3 (#36829) chore(core): keep checkpoint_ns behavior in streaming metadata for backwards compat (#36828) feat(core): Add chat model and LLM invocation params to traceable metadata (#36771) fix(core): restore cloud metadata IPs and link-local range in SSRF policy (#36816) chore(deps): bump pytest to `9.0.3` (#36801) chore(core): harden private SSRF utilities (#36768) fix(openai): handle content blocks |
| `langchain-core==1.3.0` | 2026-04-17 | High | Changes since langchain-core==1.2.31  release(core): release 1.3.0 (#36851) release(core): 1.3.0a3 (#36829) chore(core): keep checkpoint_ns behavior in streaming metadata for backwards compat (#36828) feat(core): Add chat model and LLM invocation params to traceable metadata (#36771) fix(core): restore cloud metadata IPs and link-local range in SSRF policy (#36816) chore(deps): bump pytest to `9.0.3` (#36801) chore(core): harden private SSRF utilities (#36768) fix(openai): handle content blocks |

## Citation

- HTML: https://www.freshcrate.ai/projects/langchain
- Markdown: https://www.freshcrate.ai/projects/langchain.md
- Dependencies JSON: https://www.freshcrate.ai/api/projects/langchain/deps

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