OpenRouterText to speechComing soon

fish-audio/s2.1-pro

Name: fish-audio/s2.1-pro
Brand: OpenRouter

fish-audio/s2.1-pro is a text to speech tool from OpenRouter that runs in the background and returns audio. Coming soon: listed with its price, not yet open to runs.

This tool is listed but not yet available to run.

Price pending

Pricing

Price pending.

Limits

Runs: In the background
Returns: audio
Longest queue wait: 3600s
Run deadline: 1800s
Largest inline input: 1024 KB
Largest input file: 500 MB
Largest output: 4768 MB
Outputs per run: 16

Input

Field	Kind	Default	Description
`input` required	JSON	—	Text to synthesize, or a list of turns for multi-speaker input. Each turn has its own text, voice, and instructions. Multi-speaker input is supported by Gemini TTS models and by Fish Audio models other than S1.
`voice` required	text	—	Voice identifier (provider-specific).
`response_format`	one of mp3, pcm	pcm	Audio output format
`input_references`	JSON	—	Reference content for stateless voice cloning or voice design. Audio mode: one to three `input_audio` parts, each optionally paired with a `text` part carrying its transcript (a single clip accepts its transcript before or after it; with multiple clips each transcript immediately follows its clip), plus at most one `image_url` part as a scene image on providers that condition the cloned voice on its setting; only routed to endpoints that support voice cloning (and multiple references or image references when those parts are sent). Image mode: exactly one `image_url` part; only routed to endpoints that support image references. An empty array is treated as no reference.

Same request in code

curl https://api.spiral.ai/v1/runs \
  -H "Authorization: Bearer $SPIRAL_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
    "provider": "openrouter",
    "model": "fish-audio/s2.1-pro",
    "input": {
      "input": {},
      "voice": "en_paul_neutral"
    }
  }'