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Sesame: CSM 1B

sesame/csm-1b

Released Apr 23, 20264,096 context$7 per 1M characters

CSM 1B is a conversational speech model from Sesame. It accepts text input and produces English speech output, with voice options spanning conversational and read-speech styles. At 1B parameters, it is suited for dialogue-oriented applications such as voice assistants and interactive agents.

Providers for CSM 1B

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Performance for CSM 1B

Compare different providers across OpenRouter

Effective Pricing for CSM 1B

Actual cost per million tokens across providers over the past hour

Apps using CSM 1B

Top public apps this month

Recent activity on CSM 1B

Total usage per day on OpenRouter

Requests
95

Total number of API requests made to this model per day on OpenRouter.

Uptime stats for CSM 1B

Uptime stats for CSM 1B across all providers

Sample code and API for CSM 1B

OpenRouter normalizes requests and responses across providers for you.

OpenRouter provides a text-to-speech API that converts text into natural-sounding audio. Send text and a voice selection, and receive raw audio bytes in your chosen format.

The response is a raw audio stream (not JSON). The generation ID is returned in the X-Generation-Id response header for tracking.

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.