# langchain-openai==1.6.3

Category: agent-infrastructure
Published: 2026-09-21T18:32:44Z
Source: [LangChain releases](https://github.com/langchain-ai/langchain/releases/tag/langchain-openai%3D%3D1.6.3)
Agent usefulness: 82/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-09-22T00:17:22.720Z
Tags: langchain, tools, orchestration

## Human Summary
langchain-openai 1.6.3 adds support for GPT-6 request constraints, exposes inferred Responses API routing at initialization, and updates anyio.

## Agent Summary
Updated langchain-openai to 1.6.3. Key changes: exposed inferred Responses API routing during initialization, added support for GPT-6 request constraints, and bumped anyio dependency from 4.11.0 to 4.14.2.

## Body
The langchain-openai package was updated to version 1.6.3. Notable updates include exposing inferred Responses API routing at initialization ( 40715), adding support for GPT-6 request constraints ( 40443), and upgrading anyio dependency from 4.11.0 to 4.14.2 ( 40629).

## Recommended actions
- Upgrade langchain-openai to version 1.6.3 if relying on inferred Responses API routing or updated GPT request constraint handling.
- Verify compatibility with anyio versions up to 4.14.2 in the runtime environment.

## 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.