OpenAI ships Responses API WebSocket support and improved real-time voice model

OpenAI released two developer-facing API updates: the gpt-realtime-1.5 model improves voice command reliability with 10% better number/letter transcription and 7% better instruction following. The Responses API now supports WebSockets, opening persistent connections that speed up complex agent workflows by 20-40%. The WebSocket upgrade eliminates the need to retransmit full context with every request, a significant optimization for multi-step AI agents with frequent tool calls.

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