C1 is family of API endpoints that use different underlying LLM models. The pricing is based on the model family and the amount of tokens used. Pricing is based on model name irrespective of the kind of endpoint you use. For example, using the embed endpoint with c1-latest is priced the same as using the visualize endpoint with the same model.

Generally speaking, a model name is more than just the model of the LLM it uses. It also includes the version of the model, the set of components available for use in the UI, and any other metadata.

This guide is called “Models” and not “API Versions” because typically you’d pass the API version to the model parameter in the request to the LLM compatible endpoints of C1.

  • Nightly models are updated daily with the latest changes. NOT recommended for production use.
  • Latest models are updated monthly with the latest stable version of the model.
  • Stable models are updated in the table below. When shipping in production, use the latest stable model.

c1-nightly

  • Input: $3.50 per million tokens
  • Output: $18.00 per million tokens

c1-latest

Will point to the latest stable version.

Model table

ModelUnderlying LLMInput PriceOutput PriceContext WindowMax Output
c1-202504XX*Sonnet 3.5$3.50/M tokens$18.00/M tokens180k tokens8192 tokens