Back to Models
TTS-1
openaiopenai/tts-1
Media Generation Capabilities
tts
- output_formats
- mp3
- opus
- aac
- flac
- voices
- alloy
- echo
- fable
- onyx
- nova
- shimmer
- defaults
- voice
- alloy
API guide
Speech generation (v1/audio/speech)
cURL
curl https://api.therouter.ai/v1/audio/speech \
-H "Authorization: Bearer $THEROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "openai/tts-1",
"input": "The quick brown fox jumped over the lazy dog.",
"voice": "alloy"
}' \
--output speech.mp3Streaming realtime audio (PCM)
cURL
curl https://api.therouter.ai/v1/audio/speech \
-H "Authorization: Bearer $THEROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "openai/tts-1",
"input": "Hello, this is a streaming TTS demo.",
"voice": "nova",
"response_format": "pcm"
}' | ffplay -f s16le -ar 24000 -ac 1 -i -Fact ledger β every claim on this page traces here
| source | URL | retrieved | |
|---|---|---|---|
| Release date | openai.com β | 2026-06-03 | verified |
| Pricing | openai.com/api/pricing β | 2026-06-03 | verified |
| Max input length | platform.openai.com β | 2026-06-03 | verified |
| Supported voices | platform.openai.com β | 2026-06-03 | verified |
| Output formats | platform.openai.com β | 2026-06-03 | verified |
| Speed control | platform.openai.com β | 2026-06-03 | verified |
| Rate limits (Tier 1) | platform.openai.com β | 2026-06-03 | verified |
| Instruction-following (voice style) | platform.openai.com β | 2026-06-03 | verified |
| Training cutoff | β | β | unknown |
| License | openai.com/policies β | 2026-06-03 | verified |
| Relative latency vs TTS-1 HD | platform.openai.com β | 2026-06-03 | verified |
| OpenAI launches gpt-4o-mini-tts with instruction-following for voice agents | openai.com β | 2026-06-03 | verified |
| OpenAI TTS voices arrive on Azure OpenAI Service | techcommunity.microsoft.com β | 2026-06-03 | verified |
| What is the difference between TTS-1 and TTS-1 HD? | platform.openai.com β | 2026-06-03 | to verify |
| Should I migrate from TTS-1 to gpt-4o-mini-tts? | platform.openai.com β | 2026-06-03 | to verify |
| How do I use TTS-1 via TheRouter? | platform.openai.com β | 2026-06-03 | to verify |
| What voices are available, and can I use custom voices? | platform.openai.com β | 2026-06-03 | to verify |