Use case
GPT-5.4 Nano tool calling
tool calling notes for gpt-5.4-nano: 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 $0.090 on corouter (input $0.040, output $0.050).
Tool definitions count as input
Tool JSON schemas count toward input tokens. Input for gpt-5.4-nano is $0.040. More tools and longer schemas raise the input bill. The output rate does not change.
GPT-5.4 Nano is the lowest GPT-5.4 list rate, with a 400K window and vision. Send gpt-5.4-nano for high-volume chat and image passes.
Set it next to a lower output rate
GPT-5.4 Nano (gpt-5.4-nano) lists at $0.200 input and $1.25 output per million tokens. corouter bills $0.040 input and $0.250 output. Context is 400K.
A sample of 1 million input tokens plus 200 thousand output tokens is about $0.090 on corouter (input $0.040, output $0.050).
Questions
- Which model ID should the request send?
- Send gpt-5.4-nano. 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.