OpenAIMistral AIAudio matchupSpeech output
GPT-4o Mini TTSvs.Voxtral Mini TTS
Which model is better?
GPT-4o Mini TTS is slightly ahead in independent tests, but the lead is not certain.
Independent testsDesignArena
GPT-4o Mini TTS0 of 1
Voxtral Mini TTS0 of 1
Popularityout of 100
GPT-4o Mini TTSahead36
Voxtral Mini TTS29
Weights and access
GPT-4o Mini TTSproprietary
Voxtral Mini TTSopenopen, local
Priceverbatim from the provider
GPT-4o Mini TTS$0.60 per 1M text tokens
Voxtral Mini TTS$16 per 1M characters
Pick GPT-4o Mini TTS for
leaning DesignArenamore popular
Pick Voxtral Mini TTS for
open weightsruns locally
Shared tests
Independent evaluators and leaderboards only, the newest shared snapshot per evaluator. With 95 % ranges a lead counts when they do not overlap; for hit rates, when it holds in a 95 % test. Without any uncertainty figure at most “slightly ahead”.
DesignArena
GPT-4o Mini TTS slightly aheadDesignArena TTS Arena Elo
GPT-4o Mini TTS1,186
Voxtral Mini TTS992
as of October 28, 2026
Source · latest October 28, 2026
All data side by side
Prices are verbatim from the provider, because audio models bill per minute, character or token.
| GPT-4o Mini TTS | Voxtral Mini TTS | |
|---|---|---|
| Task | Speech output | Speech output |
| Developer | OpenAI | Mistral AI |
| Status | Deprecated | Active |
| Weights | proprietary | open |
| Runs locally | no | yes |
| License | n/a | CC BY-NC 4.0 |
| Price | $0.60 per 1M text tokens | $16 per 1M characters |
| Popularity (out of 100) | 36 | 29 |