Model Credit Costs

Not every message costs the same number of credits — cost scales with how expensive the model is to run.

Cost per message	Models
1 credit	Gemini 3.1 Flash-Lite, Claude Haiku 4.5, ChatGPT 5.4 Mini, Gemini 2.5 Flash, Gemini 2.5 Flash-Lite, Gemini 3 Flash (Preview)
2 credits	Gemini 3.7 Flash, Gemini 3.1 Pro (Preview), Gemini 2.5 Pro, ChatGPT 5.4 Auto
3 credits	Claude Sonnet 5, Claude 4.6 Sonnet, Claude 4.5 Sonnet, Claude 3.7 Sonnet, ChatGPT 5.4 Reasoning
6 credits	ChatGPT 5.5
None	Any model running on your own key (Max)

ChatGPT 5.5 has a band to itself because it is the only model here priced above the Sonnet tier — three credits would not cover what one of its requests actually costs to serve.

Full-Page Deep Scan surcharge

Turning on Deep Scan adds a surcharge on top of the model's normal cost, since it processes far more text per request:

The surcharge is the model's own cost doubled, plus one.

Normal cost	With Deep Scan
1 credit	3 credits
2 credits	5 credits
3 credits	7 credits
6 credits	13 credits

Deep Scan is a Pro feature, so this table never applies to a guest or a Free account — which is why ten and fifteen credits a day stay ten and fifteen messages a day on those plans.

If you're trying to stretch a monthly credit allowance further, everyday questions on a 1-credit model go a lot further than a Deep Scan request on ChatGPT 5.5 (13 credits) — save the heavier combination for when you actually need it.