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Use case

GPT-5.6 Terra image input

image input notes for gpt-5.6-terra: 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 $0.880 on corouter (input $0.400, output $0.480).

Images count as input

GPT-5.6 Terra lists Vision. Image tokens bill at the input rate of $0.400. Generated text still bills at the output rate of $2.40.

GPT-5.6 Terra is listed with these modalities: Chat, Reasoning, Vision.

This ID

GPT-5.6 Terra sits between Sol and Luna on the GPT-5.6 rate card and does not carry the Code modality tag. Send gpt-5.6-terra for long-context chat and vision at the mid rate.

A sample of 1 million input tokens plus 200 thousand output tokens is about $0.880 on corouter (input $0.400, output $0.480).

Questions

Which model ID should the request send?
Send gpt-5.6-terra. 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.