# WebSocket support for OpenAI Responses API live on AI Gateway

> Source: <https://vercel.com/changelog/websocket-support-for-openai-responses-api-live-on-ai-gateway>
> Published: 2026-07-27 00:01:00+00:00

[AI Gateway](https://vercel.com/ai-gateway) now supports WebSocket mode for the OpenAI Responses API. You can keep a persistent connection open and continue each turn by sending only new input items plus `previous_response_id`

, instead of re-sending the full context over a fresh HTTP request every turn.

[OpenAI reports](https://developers.openai.com/api/docs/guides/websocket-mode) up to ~40% faster end-to-end execution on WebSockets for agentic rollouts with 20 or more tool calls.

The Responses route opens at `GET /v1/responses`

and accepts raw `response.create`

frames over a persistent WebSocket connection. The mode is compatible with `store=false`

and [Zero Data Retention](https://vercel.com/docs/ai-gateway/security-and-compliance/zdr), and follows OpenAI's [WebSocket mode](https://developers.openai.com/api/docs/guides/websocket-mode) specification upstream.

See the [AI Gateway documentation](https://vercel.com/docs/ai-gateway/sdks-and-apis/responses/websockets) for setup and the full route list.