Use case
GPT-5.2 Codex tool calling
tool calling notes for gpt-5.2-codex: 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 $0.910 on corouter (input $0.350, output $0.560).
Tool definitions count as input
Tool JSON schemas count toward input tokens. Input for gpt-5.2-codex is $0.350. More tools and longer schemas raise the input bill. The output rate does not change.
GPT-5.2 Codex is the earlier coding ID at the same list rate and window as GPT-5.3 Codex. Send gpt-5.2-codex when the client already requests it.
Set it next to a lower output rate
GPT-5.2 Codex (gpt-5.2-codex) lists at $1.75 input and $14.00 output per million tokens. corouter bills $0.350 input and $2.80 output. Context is 272K.
A sample of 1 million input tokens plus 200 thousand output tokens is about $0.910 on corouter (input $0.350, output $0.560).
Questions
- Which model ID should the request send?
- Send gpt-5.2-codex. 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.