Overview

Model specifications

Context: 4,096 tokens
Maximum output: 3,686 tokens
Architecture: text->speech
Tokenizer: Other
Knowledge cutoff: Not provided
Moderated: No

OPENROUTER

Complete pricing

Synchronized OpenRouter rates. Token prices are shown per one million tokens.

Characters: $7

API

Model configuration

Supported voices

conversational_aconversational_bread_speech_aread_speech_bread_speech_cread_speech_dnone

API

Quick start

Set OPENROUTER_API_KEY locally. Python requires requests; JavaScript runs in Node.js. Keep the key on the server.

Choose a supported voice. Replace YOUR_VOICE_ID if no voice is listed.

API documentation

curl --fail-with-body https://openrouter.ai/api/v1/audio/speech \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"sesame/csm-1b","input":"Hello!","voice":"conversational_a","response_format":"mp3"}' \
  --output speech.mp3

Capabilities

Input → Output

Input

text

Output

speech

API

Supported API parameters

Available providers

1 Provider

Checked: September 16, 2026

Live providers on OpenRouter

Provider availability, latency, throughput and routing can change continuously. Open the source page for current operational data.

OpenRouter

DeepInfra

Not provided

Context: 4K
Maximum output: 4K

Sesame: CSM 1B