TTS-1 HD
Model overview
tts-1-hd
A text-to-speech model optimized for audio quality.
audiospeechtext to speechvoice assistantenterprise access
Representative version
tts-1-hd
| Company | OpenAI |
|---|---|
| Release | Not disclosed |
| Release type | Model release |
| Parameters | Not disclosed |
| Architecture | Not disclosed |
| Context | Not disclosed |
| Input modalities | text |
| Output modalities | audio |
| Tool use / function calling | Tool use: Not disclosed; Function calling: Not disclosed |
| Structured output / reasoning | Structured output: Not disclosed; Reasoning: Not disclosed |
| Vision / audio / video | Confirmed: Audio |
| Open weights / License | No open weights currently / weight license not disclosed openai-tts-1-hd-current · License not applicable |
| Vendor API | Available TTS-1 HD Model | OpenAI APIopenai-tts-1-hd-current · 2026-08-10 |
| OpenRouter | Not separately listed on OpenRouter |
| Pricing | Official pricing page |
| Benchmark | No reliable public source |
| Public signals | No reliable public source |
| Use cases | voice assistant / enterprise API / audio and speech / speech |
| Claim evidence | Release event / Model specificationsTTS-1 HD Model | OpenAI APItts-1-hd · TTS-1 HD · tts-1-hd |
OpenRouter
Pricing / context / availability
| OpenRouter | Not separately listed on OpenRouter |
|---|---|
| OpenRouter listing | Not separately listed in the current OpenRouter public list |
| Mapped version | tts-1-hd openai-tts-1-hd-current |
| Pricing | Official pricing page |
| Context | Not disclosed |
| Speed/Latency | No reliable public source |
| Snapshot time | 2026-08-11T06:28:09.895Z |
| Source | View source |
Missing public information
Public information not yet available
Parameter scale not disclosedRelease date not disclosedNot listed on OpenRouterNo reliable benchmark sourceNo public model-card activity countersNo linkable model-specific reviewSpeed/latency not disclosed