Use case
Claude Opus 5 tool calling
tool calling 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).
Tool definitions count as input
Tool JSON schemas count toward input tokens. Input for claude-opus-5 is $1.00. More tools and longer schemas raise the input bill. The output rate does not change.
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.
Set it next to a lower output rate
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.