TTS-1 HD
TTS-1 HD is the quality-focused companion to TTS-1. It turns text into audio through the Speech endpoint and is now deprecated.
Deprecated API; check access details
A different synthesis priority
The documentation distinguishes the HD release by its focus on speech quality, while TTS-1 prioritizes speed. Both are text-to-speech models. Neither model name establishes the quality of a specific voice or language in an application.TTS-1 HD official model documentation
Review an existing integration
Practical guidance. For recorded narration, compare pacing, names and sentence boundaries using the same approved script. Listen to the complete passage, not only the first sentence. Keep the source text available for accessibility and for later corrections.
Specifications & access
| Detail | Value and conditions |
|---|---|
| Status | Deprecated API; check access details |
| Access | API |
| Model identifiers | tts-1-hd |
| Provider status | Deprecated in the current OpenAI model catalog; confirm remaining account access.TTS-1 HD official model documentation |
Related models
TTS-1 converts written text into speech and was designed for low-delay delivery.
Launch date not confirmedDeprecated API; check access detailsAPI