Model Tracker
tts-1
tts-1 is an AI model made by OpenAI. OpenAI released it on 6 November 2023. It is deprecated. It takes text and returns audio.
tts-1 is an AI model made by OpenAI. OpenAI released it on 6 November 2023. It is deprecated. It takes text and returns audio. Its context window is 4,096 characters.
- Released
- 6 November 2023 — openai.com, read 19 October 2026
- Status
- Deprecated — developers.openai.com, read 19 October 2026
- Takes
- Text — developers.openai.com, read 19 October 2026
- Returns
- Audio — developers.openai.com, read 19 October 2026
- Open weights
- Not confirmed: OpenAI's pages reviewed do not state whether tts-1 has open weights.
- Licence
- Not confirmed: OpenAI's pages reviewed do not name a licence for tts-1.
- Context window
- 4,096 characters — developers.openai.com, read 19 October 2026
- Longest answer
- Not confirmed: OpenAI's pages reviewed do not print a standard maximum output-token limit for tts-1.
- Knowledge cutoff
- Not confirmed: OpenAI's pages reviewed do not state a knowledge cutoff for tts-1.
- API price, input
- $15.00 per 1000000 characters — developers.openai.com, read 19 October 2026
- API price, output
- Not confirmed: OpenAI publishes a speech-generation price per 1,000,000 characters, but does not publish a separate output price for tts-1.
- Where
- API — developers.openai.com, read 19 October 2026
- Parameters
- Not confirmed: OpenAI's pages reviewed do not publish a parameter count for tts-1.
- Model card
- Not confirmed: OpenAI's pages reviewed provide a model documentation page, but do not identify a model card or system card for tts-1.
Questions
When was tts-1 released?
OpenAI released tts-1 on 6 November 2023.
Is tts-1 still available?
It is deprecated: OpenAI has announced the date it will retire it.
What is the context window of tts-1?
The context window of tts-1 is 4,096 characters, as OpenAI prints it.
What does tts-1 take and return?
tts-1 takes text and returns audio.
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Sources
- TTS-1 Model | OpenAI API (read 19 October 2026)
- Deprecations | OpenAI API (read 19 October 2026)
- New models and developer products announced at DevDay (read 19 October 2026)
- Create speech | OpenAI API Reference (read 19 October 2026)