gpt-realtime-1.5 by OpenAI
Tighter instruction adherence in speech agents
gpt-realtime-1.5 by OpenAI launched on February 26, 2026 with 304 votes, #78 of 16,628 launches that month and more than 99% of that year's launches.
In plain words
gpt-realtime-1.5 is an AI model for OpenAI's Realtime API that enables voice-based workflows. It improves upon previous versions with better instruction following, more reliable tool calling, and enhanced multilingual accuracy. The model is designed for developers building speech agents and applications requiring real-time voice interactions.
written from the facts on this page · September 2026
From the sources
Voice workflows just got stronger with gpt-realtime-1.5 in the Realtime API. The model offers more reliable instruction following, tool calling, and multilingual accuracy.
Learn which realtime and audio guide to use for each speech application.
Choose the right path for voice agents, translation, transcription, and speech generation. Start with the outcome you want to build. Realtime sessions are best for live audio that needs low latency. Request-based audio APIs are best for files, bounded requests, or generated speech that doesn’t need a live session. Realtime sessions keep a connection open while your application sends audio, receives events, and updates session state. The model should respond to the user, call tools, and manage conversation state. The app needs streaming transcript deltas without model-generated spoken responses. Use a voice-agent session when your application needs an assistant that responds to the user. Use…from developers.openai.com
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