Tri-fold brochure
Taking the "Brochure · Tri-Fold Layout" template as an example: about 40 credits on GPT Image 2 Auto.
The credit prompt before each generation is authoritative; it changes with model, resolution and duration.
Brand or product material · Promotion goal.
A single generation usually lands between one and a few minutes depending on model and resolution; several can run at once, with the limit set by your plan.
Yes. Any shot can be re-run with an edited prompt or a different model; what you already generated stays, and re-runs are charged at their actual cost.