TTS benchmarks

Every benchmark the TTS index tracks, with each core benchmark's share of the composite and how many models it covers.

13 benchmarks tracked.

• Artificial Analysis Speech Arena: Controlled Voice Elo (voice cloning)
• Artificial Analysis Speech Arena: Provider Voice Elo
• TTS Arena V2 (Hugging Face, TTS-AGI) Elo
• CV3-Eval: multilingual cloning (CER/WER, SIM)
• EmergentTTS-Eval: overall win rate vs gpt-4o-mini-tts baseline
• MiniMax TTS Multilingual Test Set: speaker similarity
• MiniMax TTS Multilingual Test Set: WER (24 languages)
• Seed-TTS-eval: Mandarin CER (zero-shot cloning intelligibility)
• Seed-TTS-eval test-hard: CER
• Seed-TTS-eval: speaker similarity SIM-o (WavLM-large SV)
• Seed-TTS-eval: English WER (zero-shot cloning intelligibility)
• Time to first audio byte (TTFB), independent measurement
• TTSDS2 distribution score (prosody, speaker, intelligibility, generic)