ElevenLabs · Voice model

Eleven Flash v2.5

elevenlabs/eleven-flash-v2.5

Voice

Released Oct 7, 2026

Eleven Flash v2.5 is an ultra-low-latency text-to-speech model from ElevenLabs. It is suited for conversational and real-time use cases, supports 32 languages, and has a 40,000-character request limit.

Specifications

Input: text, up to 20,000 characters per call
Output: mp3 (default) or raw pcm
Voice: provider voice ids via `voice`; omitted = the provider's default when it has one
Billing: per character of input text

Use it

POST /api/v1/audio/speech · MCP speak · full reference

curl https://omnirail.org/api/v1/audio/speech \
  -H "Authorization: Bearer $OMNIRAIL_KEY" -H "Content-Type: application/json" \
  -d '{"model":"elevenlabs/eleven-flash-v2.5","input":"Hello from OmniRail. Every model, one key.","response_format":"mp3"}' \
  --output hello.mp3