{
  "publisher": "Voice Arena",
  "board": "https://voicearena.com/tts-leaderboard/us-english",
  "provenance": "SpeechifyAI's reading of Voice Arena's public US English TTS leaderboard on 24 Sep 2026: the median time to first audio (p50) of every model the board gives a latency reading, cross-checked against the latency graphic Voice Arena prepared for its own announcement, plus Simba 3.2's quality standing on the same board.",
  "metric": "time to first audio, p50, milliseconds, from Voice Arena's automated measurements",
  "capturedOn": "2026-09-24",
  "date": "24 Sep 2026",
  "modelsOnBoard": 20,
  "simba32Quality": { "rank": 7, "rankRange": "6 to 8", "elo": 1032, "eloInterval": 6 },
  "latency": [
    { "model": "SpeechifyAI Simba 3.2 Real-time", "ttfaP50": 123, "ours": true },
    { "model": "Inworld Realtime TTS 2 Research Preview", "ttfaP50": 168.5 },
    { "model": "Gradium TTS Real-time", "ttfaP50": 236 },
    { "model": "Cartesia Sonic-3.5 Real-time", "ttfaP50": 250 },
    { "model": "Smallest AI Lightning 3.1 Pro Real-time", "ttfaP50": 263.5 },
    { "model": "Fish Audio S2 Pro Real-time", "ttfaP50": 267 },
    { "model": "Fish Audio S2.1 Pro Real-time", "ttfaP50": 283 },
    { "model": "Cartesia Sonic-3.6 Real-time", "ttfaP50": 340.5 },
    { "model": "xAI Grok TTS Real-time", "ttfaP50": 354 },
    { "model": "Microsoft Azure Dragon HD Omni", "ttfaP50": 485 },
    { "model": "Murf AI Falcon 2 Real-time", "ttfaP50": 528 },
    { "model": "ElevenLabs Eleven v3 Conversational", "ttfaP50": 587.5 },
    { "model": "OpenAI gpt-4o-mini-tts", "ttfaP50": 811.5 },
    { "model": "Google DeepMind Gemini 3.1 Flash TTS", "ttfaP50": 890 }
  ]
}