Models

These are the prices you pay: each model's own price plus 20%, per million tokens. The list is live from GET /models.

Model idsCopy Anchor Link

Send the id as model, like anthropic/claude-sonnet-5.5. A few more forms work:

• Claude clients' own names on /messages: claude-sonnet-5-5, dated names like claude-haiku-4-5-20251001 and the [1m] suffix map to the listed model.
• Latest aliases like ~anthropic/claude-opus-latest work, and are priced as the model they point to.
• Variants change how a model runs, not its price per token: :online, :nitro, :floor and :exacto. See Routing and fallbacks.

Not servedCopy Anchor Link

These answer 400 model_not_served, because their price can't be known before the call:

• free models and any :free version
• :batch versions and retired versions like :thinking
• routers that pick a model after the call

A model the router doesn't know answers 400 unknown_model. New models show up in the list within an hour of their release.

Picking a modelCopy Anchor Link

• For agents that run all day, a fast, cheap model keeps the credit going: Gemini Flash, DeepSeek Flash or Claude Haiku.
• For hard problems, a frontier model with reasoning: Claude Opus, GPT or Gemini Pro.
• For images, see Images: image models have their own list.