OpenAI TTS-1 HD
Listed Proprietary · OpenAI
7.6
/100
OpenAI TTS-1 HD is a proprietary text-to-speech (TTS) API from OpenAI, measured by one independent benchmark, Artificial Analysis.
Artificial Analysis
OpenAI TTS-1 OpenAI · text-to-speech (TTS) API
ListedSpeech Arena Elo 1,089 on Artificial Analysis, latency not measured; ranked 58th (tied) of 112 in the TTS for Voice Agents 2026 index.
Benchmark summary: 7.6/100, ranked 58th (tied) of 112 in the TTS for Voice Agents 2026 index (Listed). Strongest criterion: price, 1.8 of 5 points.
OpenAI TTS-1 is a proprietary text-to-speech (TTS) API from OpenAI, measured by one independent benchmark, Artificial Analysis.
Overall score
7.6 /100
Score breakdown
- Real-time speed 0 /60
- Voice quality 5.8 /20
- Accuracy 0 /15
- Price 1.8 /5
Data checked on September 30, 2026
Updated after each benchmark capture
Every point comes from a public benchmark: sources · methodology
OpenAI TTS-1 ranks 58th of 112 in the 2026 text-to-speech (TTS) API benchmark, with a score of 7.6/100.
Real-time latency
Neither Coval nor Speko measures OpenAI TTS-1's latency, so it scores 0 of 60 on real-time speed and does not appear in the real-time ranking.
Accuracy (word error rate)
No accuracy measurement: Coval does not measure its word error rate and Speko does not rate its pronunciation robustness, so accuracy counts 0 of 15.
Voice quality
In the Artificial Analysis Speech Arena (capture of October 1, 2026), OpenAI TTS-1 has an Elo of 1,089 (±11, 95% confidence) from 6,078 blind comparisons, 39th highest of the 92 models Artificial Analysis rates.
Price
Artificial Analysis lists OpenAI TTS-1 at $15 per 1M characters (19th lowest of the 78 models Artificial Analysis lists a price for).
Benchmark measurements
Artificial Analysis Speech Arena
- Speech Arena Elo (blind listener preference)
- 1,089
- Elo 95% interval (±)
- 11
- Arena rank
- 39
- Arena rank range
- 35-43
- Arena appearances
- 6,078
- Voices tested
- 6
- Price per 1M characters
- 15 USD
- Released
- Nov 2023
- Artificial Analysis model
- TTS-1
- Artificial Analysis leaderboard
- artificialanalysis.ai
Not collected
- Speed (Coval time to first audio) — not measured by Coval (capture of 2026-10-01, 30-day window); counts 0
- Speed (Speko time to first audio) — not measured by Speko (capture of 2026-10-01); counts 0
- Quality (Speko naturalness) — not measured by Speko (capture of 2026-10-01); counts 0
- Accuracy (Coval word error rate) — not measured by Coval (capture of 2026-10-01, 30-day window); counts 0
- Accuracy (Speko robustness) — not measured by Speko (capture of 2026-10-01); counts 0
- Price (Speko cost per 1M characters) — not measured by Speko (capture of 2026-10-01); counts 0
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