FLUX 3 Image Kleinvs.Nano Banana 2.1
Which one is better?
In our own test both are on par. Neither is in the arena. Neither has an API price.
Same prompt, two images
Same task, the first image of each. The task with the biggest difference is preselected.
Result for “Product photography”:Nano Banana 2.1 ahead
What the rating looks at: Materials, reflections, and fine details.
“Ahead”: better in all three rating rounds. “Slightly ahead”: a higher value, but not in every round.
Test protocol of the images
Both models receive the same archived prompt in exactly one request, and the first result counts. Files are normalized to 1,024 × 1,024 pixels without cropping. Provider resolution, randomness, quality tier and prompt processing can still differ. The images are a practical visual test, not a reconstruction of the arena configuration.
Character and detail
FLUX 3 Image Klein: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.009000, generated Nov 1, 2026, 8:28 PM. Source
Nano Banana 2.1: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.036408, generated Nov 1, 2026, 9:40 PM. Source
Protocol gradually-image-comparison-v1. Prompt SHA 256: 985a75b38642a9f0e5e0c0e0c67f1b7f67780d42bd2168fa24e9a7a7a94b0da6
FLUX 3 Image Klein image SHA 256: b3331460097da628f405817301b99f206142350757be51bee5e406216ef8359f
Nano Banana 2.1 image SHA 256: f89e3f52678670058ce0e1e9b0b5b6ec084e25a212491b5025e76d7525fb8707
Infographic
FLUX 3 Image Klein: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.009000, generated Nov 1, 2026, 8:28 PM. Source
Nano Banana 2.1: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.036560, generated Nov 1, 2026, 9:40 PM. Source
Protocol gradually-image-comparison-v1. Prompt SHA 256: ed65cb4e6a51e2336f8b149ad4cbb16e020f07d527ad94362e719d2dcf91d94f
FLUX 3 Image Klein image SHA 256: 8f6c2d4ea5814181f198e45caf6b561a650145fccf667ecb5cace92c1fc3bbcb
Nano Banana 2.1 image SHA 256: ce5c4b7af2575ccf9964cfeea2e4f0bb75cdad21aea29c4201e693fa307e435b
Product photography
FLUX 3 Image Klein: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.009000, generated Nov 1, 2026, 8:28 PM. Source
Nano Banana 2.1: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.036546, generated Nov 1, 2026, 9:39 PM. Source
Protocol gradually-image-comparison-v1. Prompt SHA 256: c67fd71e91304458a2feef5c91efa8677260fab0c0099a29a2c52cb579f5b2f3
FLUX 3 Image Klein image SHA 256: bafab00e86d3de8b29c6390b162e99291c84878c546246a95b5d47c6fe352fb9
Nano Banana 2.1 image SHA 256: 289b144f7d5348e9324d229e5508d5698c09035f2cbdea474845a84b852e859e
Typography and layout
FLUX 3 Image Klein: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.009000, generated Nov 1, 2026, 8:28 PM. Source
Nano Banana 2.1: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.036497, generated Nov 1, 2026, 9:39 PM. Source
Protocol gradually-image-comparison-v1. Prompt SHA 256: 2e012c3d14ee5dd02203a94f394ca80a5038cdebd6032b25a8b8a221f2255419
FLUX 3 Image Klein image SHA 256: 8f3f8cc9a1ab3c037f81a05bb3eec4e9a0129bad649347c4f40dc30c2870c0aa
Nano Banana 2.1 image SHA 256: d27b58baa4115177a46fae2d71e258c5f4de9243fc66df93983ef6127df2f320
The numbers at a glance
FLUX 3 Image Klein
not in the arena
Nano Banana 2.1
not in the arena
FLUX 3 Image Klein
Rank 9 of 74
Nano Banana 2.1
Rank 11 of 74
FLUX 3 Image Klein
no API price
Nano Banana 2.1
no API price
Ranks among the 22 image models with an arena rating and the 74 with a GraduallyBench run; prices compared with 28 models with an API price.
FLUX 3 Image Klein
- Subscription
- n/a No plan in Germany names exactly this model.
- Via API
- No API price known. Access: API, local.
- License
- Open weights.
Nano Banana 2.1
- Subscription
- At Google from €4.99 a month (Google AI Plus, with limited credits). Through other providers from €6.83 a month (Poe Basic, with limited points). 42 plans in Germany.
- Via API
- No API price known. Access: API, Web app.
- Weights
- unknown.
Subscriptions only count plans that name exactly this model. Subscription prices include VAT, API prices are in dollars.
GraduallyBench from Nov 1, 2026 · Subscription database from Sep 29, 2026 (34 days old)
All data side by side
The better value is bold. For ratings only when the gap is clear.
| Kennzahl | FLUX 3 Image Klein | Nano Banana 2.1 |
|---|---|---|
| Ratings | ||
| Arena ratingfrom votes by users, higher is better | n/a | n/a |
| Arena rank | n/a | n/a |
| Arena votesmore votes, a safer rating | n/a | n/a |
| GraduallyBenchour own rating, 0 to 100 | 71 | 69 |
| GraduallyBench by task | ||
| Typography and layoutLegible text, hierarchy, and composition | 86 | 60 |
| Product photographyMaterials, reflections, and fine details | 43 | 80 |
| Character and detailAnatomy, clothing, and spatial consistency | 82 | 67 |
| InfographicNumbers, labels, and visual organization | 74 | 71 |
| API price | ||
| Per imagelower is better | n/a | n/a |
| 100 images | n/a | n/a |
| Profile | ||
| Released | Oct 15, 2026 | Oct 6, 2026 |
| Weightsopen means: runs locally | open | unknown |
| Access | API, local | API, Web app |
| Parameters | 5.6 billion | not published |
| Largest output | 4K | not consistently published |
| Plans in Germanynaming exactly this model | n/a | 42 |
API prices for one image at 1,024 × 1,024 pixels according to Artificial Analysis.
Sources: FLUX 3 Image Klein model source (verified Nov 1, 2026) · Nano Banana 2.1 model source (verified Nov 1, 2026)
Arena ratings by category
From blind votes on LMArena. “Ahead” means the lead is clear.
No shared arena score in the stored snapshot
The stored benchmark database contains no measurement for FLUX 3 Image Klein and Nano Banana 2.1 from the same arena and category. Older model versions are not used as substitutes.
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