Get API key

Use case

Claude Opus 4.7 tool calling

tool calling notes for claude-opus-4-7: 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-4-7 is $1.00. More tools and longer schemas raise the input bill. The output rate does not change.

Claude Opus 4.7 is the Opus ID this site already published before Opus 5.5. The list rate matches Opus 4.8 and Opus 5. Send claude-opus-4-7 to avoid an unplanned ID change.

Set it next to a lower output rate

Claude Opus 4.7 (claude-opus-4-7) 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-4-7. 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.