# langchain-anthropic==1.7.4

Category: agent-infrastructure
Published: 2026-09-23T17:56:05Z
Source: [LangChain releases](https://github.com/langchain-ai/langchain/releases/tag/langchain-anthropic%3D%3D1.7.4)
Agent usefulness: 82/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-09-24T00:17:19.746Z
Tags: langchain, tools, orchestration

## Human Summary
langchain-anthropic 1.7.4 adds support for mid-conversation tool changes on SystemMessage, introduces profile augmentations for Opus 5.5 and GPT-6, and fixes an integration test cassette.

## Agent Summary
Upgrade to langchain-anthropic==1.7.4 to enable mid-conversation tool adjustments via SystemMessage and access updated model profile augmentations for Opus 5.5 and GPT-6.

## Body
langchain-anthropic release 1.7.4 introduces changes since 1.7.3. Key updates include a feature supporting mid-conversation tool modifications on SystemMessage (shared with OpenAI integrations), profile augmentations referencing Opus 5.5 and GPT-6, and an integration test cassette fix.

## Recommended actions
- Upgrade langchain-anthropic to version 1.7.4 using pip install --upgrade langchain-anthropic==1.7.4
- Review tool invocation flows if leveraging mid-conversation tool changes via SystemMessage

## Sponsors
No sponsor placement attached.

## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.