Use case
GPT-5.6 Luna tool calling
tool calling notes for gpt-5.6-luna: 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 $0.088 on corouter (input $0.040, output $0.048).
Tool definitions count as input
Tool JSON schemas count toward input tokens. Input for gpt-5.6-luna is $0.040. More tools and longer schemas raise the input bill. The output rate does not change.
GPT-5.6 Luna is the low GPT-5.6 rate, chat and vision only. Send gpt-5.6-luna when volume matters more than a reasoning or code tag.
Set it next to a lower output rate
GPT-5.6 Luna (gpt-5.6-luna) lists at $0.200 input and $1.20 output per million tokens. corouter bills $0.040 input and $0.240 output. Context is 1.1M.
A sample of 1 million input tokens plus 200 thousand output tokens is about $0.088 on corouter (input $0.040, output $0.048).
Questions
- Which model ID should the request send?
- Send gpt-5.6-luna. 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.