Use case
Claude Opus 5 API
API notes for claude-opus-5: the rate card, a worked volume, and when to send this ID. A sample of 1 million input tokens plus 200 thousand output tokens is about $2.00 on corouter (input $1.00, output $1.00).
The ID to send
Claude Opus 5 lists at the same input and output rate as Opus 4.6, 4.7, and 4.8. Send claude-opus-5 when the client names Opus 5 rather than an Opus 4 ID.
Put claude-opus-5 in the model field. The base URL is https://api.corouter.co. Familiar JSON shapes stay familiar. Do not treat a feature as covered until your own production traffic has checked it.
Rate card
Claude Opus 5 (claude-opus-5) lists at $5.00 input and $25.00 output per million tokens. corouter bills $1.00 input and $5.00 output. Context is 1M.
A sample of 1 million input tokens plus 200 thousand output tokens is about $2.00 on corouter (input $1.00, output $1.00).
Questions
- Which model ID should the request send?
- Send claude-opus-5. Do not put a different name in the model field.
- What is the minimum top-up?
- Prepaid credits, $5 minimum top-up, no subscription tier.