Use case
GPT-5.4 tool calling
tool calling notes for gpt-5.4: 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 $1.10 on corouter (input $0.500, output $0.600).
Tool definitions count as input
Tool JSON schemas count toward input tokens. Input for gpt-5.4 is $0.500. More tools and longer schemas raise the input bill. The output rate does not change.
GPT-5.4 is the general 1.05M GPT row beneath the Pro rate and above Mini. Send gpt-5.4 for chat, reasoning, and vision without the Pro multiplier.
Set it next to a lower output rate
GPT-5.4 (gpt-5.4) lists at $2.50 input and $15.00 output per million tokens. corouter bills $0.500 input and $3.00 output. Context is 1.1M.
A sample of 1 million input tokens plus 200 thousand output tokens is about $1.10 on corouter (input $0.500, output $0.600).
Questions
- Which model ID should the request send?
- Send gpt-5.4. 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.