LangChain is the leading framework for building LLM-powered applications. We track breaking changes, new integrations, deprecations, and major releases.
Official changelog →langchain-core 0.3.84 was published on 2026-04-08 and includes additional prompt sanitization changes. The release notes indicate changes to how prompts are sanitized (likely affecting template or prompt normalization) but do not list explicit API removals.
LangChain core 1.2.27 was released on 2026-04-07. The release notes list a bugfix that correctly handles symlinks in the deprecated prompt save path and a comment explaining the pygments>=2.20.0 bump. The change is a bugfix in prompt saving/loading paths and does not advertise API-breaking changes in the release notes.
LangChain released langchain-core==1.2.25 which contains fixes that harden checks for plain-text (.txt) files in deprecated prompt-loading functions, minor documentation/typo fixes, and housekeeping adjustments. The changes further adjust prompt-loading robustness and address small edge cases rather than introducing major new APIs.
LangChain published langchain==1.2.14 which includes a fix for recursion-limit handling in create_agent, a ~15% init performance improvement, security-related pygments bump, and multiple dependency updates (requests bump and partner/core minimums). The release also includes small fixes to model-provider token counting and other chores that may affect agent initialization and dependency resolution.
LangChain released langchain-core==1.2.22 (published 2026-03-24). The release notes indicate validation added for paths in prompt.save and load_prompt and that some methods were deprecated. The change appears to be aimed at preventing invalid path usage and cleaning up older APIs.
LangChain published langchain==1.2.13 which includes changes that add LangSmith integration metadata to create_agent and init_chat_model, and export Runtime from agents.middleware. There are also CI and dependency bumps and small fixes to integrations (e.g., OpenAI Responses API typing). No explicit deprecation or breaking-change notice appears in the release notes.
The langgraph repository published new releases on 2026-03-18: langgraph v1.1.3, langgraph-sdk v0.3.12, and langgraph-checkpoint-postgres v3.0.5. Release notes mention a new "execution info" addition to the runtime, several dependency bumps, and a fix to re-use connections in checkpoint-postgres. No explicit deprecations or breaking-change notices were included in the release notes.
LangChain published langchain-anthropic==1.4.0 on 2026-03-17. The release notes add AnthropicPromptCachingMiddleware to apply explicit caching to the system message and tool definitions, and expose/delegate a cache_control (cache%5C_control) kwarg to the top-level Anthropic parameters. No explicit breaking-deprecation marker was present in the release notes.
LangChain published a blog post announcing Open SWE, an open-source reference framework for internal coding agents built on top of Deep Agents and LangGraph. Open SWE packages patterns such as isolated sandboxes, curated toolsets, subagent orchestration, and middleware hooks as a reusable framework and provides installation and customization guides on GitHub.
LangChain announced a strategic enterprise partnership with NVIDIA to deliver an enterprise agentic AI platform that integrates LangGraph, Deep Agents, and NVIDIA infrastructure. The announcement highlights a commercial platform for building, deploying, and monitoring production-grade AI agents at scale.
LangChain published langchain-anthropic==1.3.5 on 2026-03-14 which contains multiple fixes (including support for eager_input_streaming and other Anthropic-related fixes) and dependency bumps (notably bumping langgraph and langgraph-checkpoint in the Anthropic partner libs). These changes are integration-level and affect how LangChain agents interact with Anthropic streaming and partner tooling.
LangChain published langchain==1.2.12 (11 Mar 2026) which introduces tracing for wrapped models and tool calls. The release adds tracing-related instrumentation to wrap model + tool call flows to capture call traces for observability and debugging of agent executions.
LangChain released langchain-core v1.2.17, continuing the rapid iteration cycle on the core framework. This is the latest in a series of releases during late February and early March 2026, following v1.2.14 through v1.2.16.
LangChain released langchain-huggingface v1.2.1, updating the HuggingFace provider integration. This ensures compatibility with the latest HuggingFace models and inference endpoints.
LangChain released langchain-core v1.2.16 on February 25, 2026, continuing the active development of the core framework library. This mid-week release addresses improvements to the chain and runnable abstractions.
LangChain released langchain-anthropic v1.3.4, updating the Anthropic provider integration. This release ensures compatibility with the latest Anthropic API features and Claude model capabilities.
LangChain released langchain-core v1.2.14, an incremental update to the core abstraction layer. This release is part of continuous improvements to the LangChain framework's reliability and developer experience.
LangChain released langchain-text-splitters v1.1.1 with updates to text chunking capabilities. Text splitters are a critical component for RAG pipelines and document processing workflows.