TTS 1
OpenAI’s native acoustic intelligence model. Engineered for real-time speech synthesis, ultra-low-latency transcription, and expressive voice understanding across diverse acoustic environments.
OpenAI
OpenAI
Native Acoustic Audio Transformer
Ultra-Low (< 180ms TTFA)
Industry Benchmarks & Evaluations
Word Error Rate on clean speech transcription benchmarks.
Cross-lingual acoustic comprehension across 40+ languages.
Speech recognition fidelity in high-noise acoustic environments.
Ultra-low latency streaming voice response synthesis.
Hour-long meeting transcription and contextual speaker diarization.
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.
Specifications
audio speech
Context window, compared
Insufficient data
No published context window for this model or its peers.
Usage on nRouter
Usage is temporarily unavailable
Our aggregate read failed, so we cannot report traffic for this model right now.
Availability
Availability is temporarily unavailable
Our own telemetry read failed, so we cannot report uptime or latency for this model right now. This says nothing about the model itself — it is not an outage, and we would rather show you nothing than a figure we did not measure.
Managed Gateway Routing
Unified single-key access with automatic multi-region fallback, real-time credit enforcement, and sub-millisecond routing latency.