TTS-1 HD: Benchmarks, Pricing & Examples
TTS-1 HD is a text-to-speech model from OpenAI, released in September 2024, with a 1K-token context window, and pricing from $7500000 per 1M input tokens.
OpenAI high-definition text-to-speech model
TTS-1 HD pricing
Providers
TTS-1 HD starts at $7500000 per million input tokens via OpenAI.
| Provider | Input $/M | Cached input $/M | Output $/M | Context in / out | TTFT p95 s | Output p5 c/s | Modalities in / out |
|---|---|---|---|---|---|---|---|
 OpenAI | $7500000 | — | — | 1.0K/— | — | — | / |
Cached input is the discounted price for prompt tokens served from a provider cache. TTFT is time to first token. Output is characters per second; p5 is the sustained floor exceeded by 95% of observed requests.
TTS-1 HD context window
Input and output token limits for TTS-1 HD, plus how it ranks on long-context understanding.
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TTS-1 HD latency
TTS-1 HD time to first token, sustained output throughput, and failed-request rate from live model usage over the trailing 7 days.
TTS-1 HD license
TTS-1 HD is a proprietary model available under its provider's product and API terms.
- License
- Proprietary
- Hosted access
Proprietary license - usage restrictions apply
FAQ
Common questions about TTS-1 HD.