Which model ID should the request send?

Send gpt-5.4-mini. 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.

Use case

GPT-5.4 Mini chat completions

chat completions notes for gpt-5.4-mini: 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 $0.330 on corouter (input $0.150, output $0.180).

Chat completions shape

A familiar JSON shape carries model and messages. Set model to gpt-5.4-mini. Paths under https://api.corouter.co follow the client you already use.

GPT-5.4 Mini (gpt-5.4-mini) lists at $0.750 input and $4.50 output per million tokens. corouter bills $0.150 input and $0.900 output. Context is 400K.

Where this GPT ID sits

GPT-5.4 Mini cuts the list rate and the window to 400K, and it has no vision tag. Send gpt-5.4-mini for shorter reasoning jobs.

A sample of 1 million input tokens plus 200 thousand output tokens is about $0.330 on corouter (input $0.150, output $0.180).

Questions

Which model ID should the request send?: Send gpt-5.4-mini. 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.

Start with $5 credits