GPT Image 2.5 high vs GPT Image 2 high: price per image
At 1024x1024 high, fal lists GPT Image 2 at $0.211 and GPT Image 2.5 at $0.05268, about a quarter. On Sume that is $0.264 vs $0.066 at list x 1.25.
At the same 1024x1024 size and the same high setting, GPT Image 2.5 is about a quarter of the price of GPT Image 2. fal lists $0.211 for GPT Image 2 and $0.05268 for GPT Image 2.5; on Sume, which bills list x 1.25, that becomes about $0.264 against $0.066. Low quality is nearly the same on both. The gap is in medium and high, and it holds at 4K.
Side by side
Both fal pages were read on 2026-10-03. Token rates are identical on OpenAI's pricing page ($30 per million image output tokens), so the difference is how many output tokens each model's quality tiers use. Sume keeps ChatGPT Image 2 selectable, per its image docs.
| Size | Quality | GPT Image 2 (fal) | GPT Image 2.5 (fal) | Sume 2 | Sume 2.5 |
|---|---|---|---|---|---|
| 1024x1024 | low | $0.006 | $0.00588 | $0.0076 | $0.0074 |
| 1024x1024 | medium | $0.053 | $0.01317 | $0.0664 | $0.0165 |
| 1024x1024 | high | $0.211 | $0.05268 | $0.2639 | $0.0659 |
| 1920x1080 | high | $0.158 | $0.03960 | $0.2064 | $0.0496 |
| 3840x2160 | high | $0.401 | $0.10008 | $0.5014 | $0.1251 |
What not to conclude
The tiers are not the same quality: GPT Image 2.5 adds xhigh and max, and at 1024x1024 its max ($0.21072) lands at GPT Image 2's high price. Judge output by testing a prompt on both before moving a pipeline. The price cut is real; a like-for-like quality claim needs your own images. For the full 2.5 ladder see the price table.
Sources
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