TTS-1 is OpenAI's standard text-to-speech model, converting written text into natural-sounding spoken audio. It offers a selection of pre-built voices and supports multiple output formats, making it straightforward to integrate voice narration into applications without requiring audio expertise.
Optimized for speed and cost efficiency, TTS-1 is well suited to use cases where latency and throughput matter more than the highest possible audio fidelity. It is a practical choice for voiceover automation, accessibility tooling, and lightweight voice interfaces.
Key Features
Multiple built-in voice options (alloy, echo, fable, onyx, nova, shimmer)
Supports MP3, Opus, AAC, and FLAC output formats
Low-latency generation suitable for real-time applications
Simple REST API integration via OpenAI SDK
Handles diverse content including prose, lists, and dialogue
Ideal Use Cases
Automated podcast or audiobook narration
Accessibility features for read-aloud content
IVR and voice assistant responses
E-learning course narration
Notification and alert audio generation
Example Prompts for TTS-1
Technical Specifications
| Provider | OpenAI |
| Category | Audio |
| Modality | Text -> Audio |
Frequently Asked Questions
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