# OpenAI Python SDK v3.43.0

Category: model-behavior
Published: 2026-11-03T18:05:44Z
Source: [OpenAI Python SDK releases](https://github.com/openai/openai-python/releases/tag/v3.43.0)
Agent usefulness: 77/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-11-03T18:17:49.885Z
Tags: openai, sdk, models

## Human Summary
OpenAI Python SDK v3.43.0 expands Live Responses delegation tools, adds WebSocket progress accumulation, and introduces WebSocket lane overflow isolation.

## Agent Summary
OpenAI Python SDK v3.43.0 introduces expanded delegation tools for Live Responses alongside WebSocket improvements including lane overflow isolation and rich progress accumulation.

## Body
OpenAI released version 3.43.0 of the OpenAI Python SDK. Key functional updates include expanding delegation tools under Live Responses (PR 4233), accumulating rich WebSocket progress events (PR 4224), and introducing WebSocket lane overflow isolation (PR 4225). The release also contains routine CI and dependency upgrades across GitHub Actions (setup-node, setup-python, and gh-action-pypi-publish).

## Recommended actions
- Upgrade openai python package to v3.43.0 if using Live Responses delegation tools or WebSocket response streaming features.
- Verify WebSocket response handling to leverage rich progress updates and validate lane overflow isolation behavior.

## 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.