Use case
GPT-5.4 Pro tool calling
tool calling notes for gpt-5.4-pro: 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 $13.20 on corouter (input $6.00, output $7.20).
Tool definitions count as input
Tool JSON schemas count toward input tokens. Input for gpt-5.4-pro is $6.00. More tools and longer schemas raise the input bill. The output rate does not change.
GPT-5.4 Pro is the outlier on the rate card: its list output rate is far above GPT-5.4. Send gpt-5.4-pro only when you have already chosen that ID on purpose.
Set it next to a lower output rate
GPT-5.4 Pro (gpt-5.4-pro) lists at $30.00 input and $180.00 output per million tokens. corouter bills $6.00 input and $36.00 output. Context is 1.1M.
A sample of 1 million input tokens plus 200 thousand output tokens is about $13.20 on corouter (input $6.00, output $7.20).
Questions
- Which model ID should the request send?
- Send gpt-5.4-pro. 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.