GPT-Realtime-2.1

openai/gpt-realtime-2.1

Realtime speech-to-speech model with configurable reasoning, tool use, and robust voice-agent behavior

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Context window: 128K
Input: Text · Audio · Image
Output: Text · Audio
Released: 2026-07-06

Max output: 32K
Knowledge cutoff: 2024-09-30
Weights: Closed
Capabilities: Attachments, Reasoning, Tool call

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ModelRegistry · Catalog updated 2026-10-01