Rankings data by OpenRouter is licensed under CC BY 4.0. Reuse and republish it with attribution. The Data API docs cover the citation format and JSON access to these datasets.
| Rank | Model | Author | requests | Change |
|---|---|---|---|---|
| 1 | Gemini 3.8 Flash TTS | 1.3M requests | +24% | |
| 2 | Gemini 3.1 Flash TTS Preview | 625K requests | +5% | |
| 3 | Kokoro 82M | hexgrad | 535K requests | +36% |
| 4 | Gemini 3.8 Flash Lite TTS | 486K requests | +84% | |
| 5 | Grok Voice TTS 1.0 | x-ai | 358K requests | +21% |
| 6 | S2.1 Pro Free (free) | fish-audio | 163K requests | +36% |
| 7 | S2.1 Pro | fish-audio | 113K requests | -29% |
| 8 | MAI-Voice-2.1-Flash | microsoft | 99K requests | >999% |
| 9 | Aura-2 | deepgram | 83K requests | +3% |
| 10 | MAI-Voice-2.1 | microsoft | 52K requests | >999% |
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