langchain-anthropic==1.7.3
langchain-anthropic 1.7.3 adds in-place support for mid-conversation SystemMessages, updates structured output routing for Fable and Opus 5.5, and updates model profiles and documentation.
Why this signal matters
The langchain-anthropic package has been updated to version 1.7.3. Key changes include: a new feature enabling mid-conversation SystemMessage instances to be sent in place; a fix auto-routing structured output to method='json schema' for fable and opus 5.5 models; refreshed Anthropic model profile data; documentation updates for Opus 5.5; and a dependency upgrade for anyio from 4.11.0 to 4.14.2.
Actionable summary
langchain-anthropic==1.7.3 introduces sending mid-conversation SystemMessages in place, auto-routes structured output to json schema for fable and opus 5.5, refreshes model profile data, updates docs, and bumps anyio to 4.14.2.
- Agent usefulness
- 82/100
- Confidence
- 96%
- Canonical data
- JSON + Markdown
What builders should check
- Upgrade langchain-anthropic to 1.7.3 via pip or package manager.
- Verify compatibility if relying on mid-conversation SystemMessage handling or structured output with Fable and Opus 5.5 models.