Provider
4 text-to-speech (TTS) models, ordered speed first: by speed tier and P95 time to first audio on Coval, then the models Coval does not measure, by name. No combined score.
Data checked on October 22, 2026 · updated after each benchmark capture
OpenAI GPT-4o mini TTS is a proprietary text-to-speech (TTS) API from OpenAI, measured by two independent benchmarks: Coval and Speko.
OpenAI GPT-Realtime-2 is a proprietary text-to-speech (TTS) API from OpenAI, measured by one independent benchmark, Artificial Analysis.
OpenAI TTS-1 is a proprietary text-to-speech (TTS) API from OpenAI, measured by one independent benchmark, Artificial Analysis.
OpenAI TTS-1 HD is a proprietary text-to-speech (TTS) API from OpenAI, measured by one independent benchmark, Artificial Analysis.