GPT-4O Mini-TTS-2025-03-20
GPT-4O Mini-TTS-2025-03-20 is a text-to-speech model developed by OpenAI, capable of converting text into speech. It is genuinely best at generating spoken audio from written input, leveraging its substantial context window of 128,000 tokens to process and understand lengthy texts.
Input
Output
Context
128K
Max Output
-
Parameters
-
Technical Specifications
Model TypeAudio
Context Window128,000 tokens
Max Output TokensNot available
ParametersNot available
Release DateDec 13, 2025
Training CutoffNot available
Licenseproprietary
Open SourceNo
Input Modalities
Text
Output Modalities
Audio
Capabilities
Resources & Links
proprietary, Proprietary - API access only
Related Tools
Data sourced from official provider APIs and documentation
Last updated: Jun 23, 2026
Start building with the right model.
Automatically route workloads to the right model for every task, every time.