Google announced Public Preview of streaming support in API Gateway, letting SSE/WebSocket-style streaming endpoints sit behind the same gateway policies (auth, API keys, observability) with no spec changes — just an opt-in flag at gateway creation. Streams can stay open up to one hour, and model routing can stream responses from Gemini, Claude, and OpenAI gpt-oss models via a single OpenAI-compatible endpoint. Gateways also gained deterministic default hostnames, so the URL is known before creation and stable across rebuilds.
Read the full story on developers.googleblog.com
What to doTry streaming by creating a new gateway with the opt-in Preview flag pointed at an existing SSE backend, and implement client reconnection logic for streams that may end before the one-hour limit.
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