# OpenAI Python SDK v3.21.0

Category: model-behavior
Published: 2026-09-29T17:40:31Z
Source: [OpenAI Python SDK releases](https://github.com/openai/openai-python/releases/tag/v3.21.0)
Agent usefulness: 77/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-09-29T18:17:26.829Z
Tags: openai, sdk, models

## Human Summary
OpenAI Python SDK v3.21.0 adds the GPT-6.1 Sol model identifier.

## Agent Summary
OpenAI Python SDK updated to v3.21.0, adding support for the GPT-6.1 Sol model identifier via commit 160b2c0.

## Body
OpenAI released version 3.21.0 of their Python SDK. The release includes a new feature under the API component that adds the GPT-6.1 Sol model identifier (PR/Issue 3986, commit 160b2c0).

## Recommended actions
- Upgrade openai-python to v3.21.0 if access to the GPT-6.1 Sol model identifier is required.

## 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.