GPT Image 2.5 vs Nano Banana Pro, Tested Side by Side

"Create a photo of a café chalkboard menu standing on an easel beside a counter in the morning. The board is hand-lettered in white chalk with a small drawn coffee cup at the top and the title "TODAY". Below it are five lines, each with the item on the left and the price on the right: "Flat white — 9.50", "Iced latte — 11.00", "Kaya toast — 6.00", "Banana bread — 7.50", "Soft-boiled eggs — 5.00". Morning sun through the café window on the left rakes across the board, showing the chalk dust and the faint ghost of old wiped-out writing; the right edge of the board falls into soft shade. On the counter behind, out of focus, a glass jar of cookies and a barista's hands pouring milk into a cup. Camera at chest height, the board filling most of the frame. Every word and number is spelled exactly as written and readable, and the board carries only these words."

GPT Image 2.5 only makes 1K on Reviral, so its picture is 1086 × 1448 px; Nano Banana Pro's is 1792 × 2400 px at 2K. We wrote one neutral prose prompt (no model-specific tricks) so neither model got an advantage.

Written and tested by the Reviral team on 24 September 2026. Every picture on this page was made on Reviral that day with the exact prompt printed next to it, one try each, nothing retouched. Prices read from Reviral's public model list and credit-cost list the same day.

For menus, price lists, app screens and any layout where columns must line up: GPT Image 2.5. It followed "the board filling most of the frame" more closely, lined the prices up, and cost 2 credits.

For a bigger file or up to 4K, or when you need up to 14 reference pictures: Nano Banana Pro. Its 2K picture has a more hand-made feel, and it was 10 seconds faster in this one run.

On spelling it was a tie: neither model made a mistake on the five items and prices. Test your own prompt on both before you buy a pack: one picture on each costs 6 credits, about $0.07.

GPT Image 2.5: name the job in one line, then use labelled parts (Scene, Subject, Important Details, Use Case, Constraints) and put every word in quotes. Our GPT Image 2.5 prompt guide shows five tested examples.

Nano Banana Pro: plain sentences that start with "Generate a single image:", the words to print in quotes, and a closing line saying those are the only words. Our Nano Banana Pro prompt guide shows five tested examples.

For a fair test, send both the same neutral prose prompt, as we did here, and read every word at full size.