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GPT-4o Mini TTS

OpenAI · Released Mar 20, 2025 · Closed weights

Text-to-speech model powered by GPT-4o Mini with steerable voice delivery

Context window
2K
tokens
Open in the timeline
BENCHMARKS

Not in the Epoch Capabilities Index. Epoch benchmarks what it can run, so this is a gap in coverage, not a poor result.

OpenAI's past year

23 release days in the past year, about one every 16 days. The next is expected around Nov 5, 2026. Forecasts ↗

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Specifications

RELEASE DATEMar 20, 2025
WEIGHTSClosed weights
CONTEXT WINDOW2K
MAX OUTPUT0
REASONINGNot listed
TOOL CALLINGNot listed
INPUTStext
OUTPUTSaudio/mpeg, audio/opus, audio/aac, audio/flac, audio/wav, audio/pcm

Models.dev record ↗

Specifications and prices from Models.dev; availability and limits may differ by provider. Benchmarks from Epoch AI (CC BY 4.0), LiveBench and the other sources named above.