[Release] langchain-ai/langchain langchain-xai==1.3.0: langchain-xai==1.3.0

langchain-xai version 1.3.0 introduces the `reasoning_effort` parameter as a standard chat model feature, along with numerous dependency updates and security patches. The release includes fixes for unsupported parameters, improved model profile data, and enhanced streaming capabilities with content-block-centric v2 support. Key updates involve langsmith, pytest, aiohttp, and other core dependencies, with emphasis on security vulnerabilities and compatibility improvements.

Key Points

• •Added `reasoning_effort` as a standard chat model parameter for enhanced control over model reasoning behavior
• •Dropped unsupported `stop` parameter from XAI integration to improve API compatibility
• •Implemented content-block-centric streaming (v2) for better streaming architecture
• •Added package version tracking to tracing metadata for improved observability and debugging
• •Patched multiple Dependabot security vulnerabilities including CVE-2026-4539 (pygments) and aiohttp compatibility issues
• •Upgraded langsmith from 0.4.31 to 0.10.2 with multiple intermediate updates for stability
• •Added `base_url` alias and `XAI_API_BASE` environment variable support for flexible API endpoint configuration
• •Refreshed model profile data multiple times with new fields including `text_inputs` and `text_outputs`
• •Standardized integration test invocation across partner packages with pytest-xdist support
• •Maintained minimum langchain-core dependency at 1.2.21+ with compatibility fixes across releases

Workflow Diagram

Concepts