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Models
Audio

GPT-4o Mini TTS (2025-03-20)

Original release snapshot of GPT-4o Mini TTS with voice instructions support

Added Dec 16, 2025

Details

Approx. Price: $13.26 per 1M characters
Model type: text-to-speech
Category: text-to-speech
Preview examples: 0

Available voices

Built-in voices accepted by NanoGPT for this model. Custom or cloned voice IDs may also be supported.

alloy

ash

ballad

coral

echo

fable

nova

onyx

sage

shimmer

verse

marin

cedar

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GPT-4o Mini Transcribe (2025-03-20)

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GPT-4o Mini Transcribe (2025-12-15)

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Ultra-low cost text-to-speech model with voice instructions support

GPT-4o Mini Transcribe

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OpenAI's efficient speech-to-text model with improved accuracy over Whisper

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Standard quality text-to-speech model with low latency