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Model · OpenAI · Text-To-Speech

GPT-4o mini TTS

OpenAI's current text-to-speech model, built on GPT-4o mini. It replaces the older tts-1 line with better quality and a newer multimodal stack.

Modality
Text-To-Speech
License
Proprietary (Proprietary)
Released
March 20, 2025
Last verified
May 10, 2026
Runs locally
No

Strengths

  • Current OpenAI speech generation model
  • Lower-cost speech output than larger realtime/audio stacks
  • Shares the same modern API surface as the rest of OpenAI's current models

Weaknesses

  • Closed weights
  • Speech generation only — no speech-to-text or full duplex realtime behavior

Try it

WhereTypeNotes
OpenAI API hosted-api API key required

Official sources

Change log

  • — Added after verification of the current OpenAI speech generation lineup.

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