Nano Banana vs Flux 2 and GPT Image 2: the same 6 prompts
We ran Nano Banana and its two closest rivals through six fixed prompts inside Krater on 27 Sep 2026. 1:1, 1024 px, one image per prompt, default settings, no prompt tuning, first output kept. Every output below is the first result, unedited.
Nano Banana: 10 credits per image, 9.2 s median, 6/6 prompts passed
Flux 2: 4 credits per image, 7.3 s median, 6/6 prompts passed
GPT Image 2: 14 credits per image, 39.1 s median, 5/6 prompts passed
Product photo
Tests: photorealism, materials, lighting
Studio product photograph of a matte black ceramic coffee mug with a walnut wood lid, on a light grey concrete surface, soft window light from the left, shallow depth of field, a few coffee beans scattered in the foreground, no text, no logo.
Candid photograph of a woman in her sixties with short grey hair laughing while holding a yellow bicycle helmet in both hands, standing on a cobblestone street in Copenhagen at golden hour, 85mm lens, natural skin texture, both hands fully visible.
Minimalist concert poster. Large headline text reading "NORTH SEA JAZZ" at the top, smaller text "Rotterdam 10 to 12 July" at the bottom, a single saxophone silhouette in the middle, mustard yellow background, navy blue ink, risograph print style.
Children's book illustration of a small red fox reading a map under an oversized green umbrella in the rain, forest in the background, watercolor and ink, warm palette, whimsical, storybook style.
Flat lay photograph on a white table: exactly three green apples in a row on the left, one blue ceramic bowl on the right containing exactly two lemons, a folded red napkin above the bowl, shot from directly above, even lighting.
Clean infographic showing a simple three-step process, horizontal, with three numbered circles connected by arrows. Labels under the circles read "Plan", "Build" and "Launch". Flat vector style, white background, teal and charcoal colours, sans-serif text.
Pass, partial and fail are about following the prompt (text, counts, layout, constraints), not about taste. Same prompt, same settings, no model-specific tuning. Read the full 10-model test
Features
Lightning Fast
One of the fastest image generation models
Good Quality
Impressive output for its speed class
Versatile
Handles many styles and subjects
Low Cost
Efficient credit usage per generation
Use cases
Quick Concepts
Rapid idea visualization 1:1
Social Content
Fast images for daily posts 16:9
Iteration
Test many prompts quickly 9:16
Brainstorming
Visual brainstorming at speed 1:1
Stats
~9s Generation
1024px Resolution
Low Credit Cost
Loved by creators
Nano Banana is incredibly fast. Perfect for quick concept explorations. Tom B., Designer
Great for generating lots of options quickly before refining with a premium model. Ursula K., Art Director
The speed-to-quality ratio is excellent. My rapid prototyping tool. Violet N., Content Creator
Comparison
Midjourney: $30/mo; Discord required
DALL·E 3: $20/mo; ChatGPT Plus
Frequently Asked Questions
What is Nano Banana?
Nano Banana is Google's fast image generation model optimized for speed and efficiency.
How fast is it?
About 9 seconds per 1024 px image in our 27 Sep 2026 test.