Models / TTS 1ID: openai/tts-1
audio speech model by OpenAI
TTS 1
Low-latency text-to-speech model from OpenAI optimized for real-time voice generation and interactive conversational applications.
Maker
OpenAI
Served On
OpenAI
Specifications
Context window, ranked against other audio speech models
Insufficient data
No published context window for this model or its peers.
Context window
—
Max output
—
Modality
audio speech
Vision
Function calling
System prompt
Benchmarks
not listed on arena.ai text leaderboard as of 2026-09-11
Pricing
Rates are read live
Pricing for tts-1 is fetched from the live catalogue on load, so it is never served from a cache that could outlive a repricing.
Availability
Not enough data yet
We have not collected enough health probes for this model to publish an uptime or latency figure. A percentage from a handful of samples is fabricated precision, so none is shown until the sample count supports one.
How TTS 1 is billed
Billed at the provider's list price, with no per-token markup.
- Exact list price
- Tokens settle at the published rate of the model that served your call.
- Cache discounts passed through
- Provider prompt-caching discounts reach your balance with no added fee.
- Cost on every response
- Each response carries the
x-nr-request-costheader, so you can reconcile spend per request.