OpenAI adds WebSocket support to Responses API for agents

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OpenAI has added WebSocket support to its Responses API, enabling more efficient agentic workflows through persistent connections. The update includes connection-scoped caching that reduces API overhead and improves model latency in agent loop execution. The feature is detailed in a technical deep dive on the Codex agent architecture.

Lead coverage: OpenAI — Speeding up agentic workflows with WebSockets in the Responses API ↗

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OpenAI first-party · 1d ago · 3/5

Speeding up agentic workflows with WebSockets in the Responses API ↗

OpenAI has added WebSocket support to its Responses API, enabling more efficient agentic workflows through persistent connections. The update includes connection-scoped caching that reduces API overhead and improves model latency in agent loop execution. The feature is detailed in a technical deep dive on the Codex agent architecture.

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Cluster ID: 5278705df0
Importance (max): 3
Members: 1
Sources: OpenAI
Earliest: 2026-04-22T10:00:00.000Z
Latest: 2026-04-22T10:00:00.000Z
Lead URL: https://openai.com/index/speeding-up-agentic-workflows-with-websockets