Reasoning

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

openai/gpt-realtime-2.1 2026-07-06 128K context $4/M input $24/M output
2 providers

Streaming speech-to-text model for low-latency transcript deltas from live audio

openai/gpt-realtime-whisper 2026-05-07 Not documented context Input not listed Output not listed
1 provider