Nano Banana 2vs.Seedream 5.0 Flash
Which one is better?
In our own test both are on par. Seedream 5.0 Flash has no arena rating yet. Seedream 5.0 Flash has no API price.
Same prompt, two images
Same task, the first image of each. The task with the biggest difference is preselected.
Result for “Infographic”:Seedream 5.0 Flash ahead
What the rating looks at: Numbers, labels, and visual organization.
“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
Nano Banana 2: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:15 PM. Source
Seedream 5.0 Flash: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.018000, generated Nov 1, 2026, 8:29 PM. Source
Protocol gradually-image-comparison-v1. Prompt SHA 256: 985a75b38642a9f0e5e0c0e0c67f1b7f67780d42bd2168fa24e9a7a7a94b0da6
Nano Banana 2 image SHA 256: 5d3a70ed3fe3328484725565d9c91fb25fc7f745bd66872dae432444493a83de
Seedream 5.0 Flash image SHA 256: ffb32d701168dd57095e39252aba67b191c008c7b9393ae22acf1e1b1caba9b9
Infographic
Nano Banana 2: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:15 PM. Source
Seedream 5.0 Flash: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.018000, generated Nov 1, 2026, 8:30 PM. Source
Protocol gradually-image-comparison-v1. Prompt SHA 256: ed65cb4e6a51e2336f8b149ad4cbb16e020f07d527ad94362e719d2dcf91d94f
Nano Banana 2 image SHA 256: 66123dd4e8cd5d22ecdca9cca8e4c5853a8046370aa4861ffee807a8c122c769
Seedream 5.0 Flash image SHA 256: 0758d1251491a26b5d7736c16597318e5807a92c30db03d9431d8584652aae3e
Product photography
Nano Banana 2: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:15 PM. Source
Seedream 5.0 Flash: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.018000, generated Nov 1, 2026, 8:29 PM. Source
Protocol gradually-image-comparison-v1. Prompt SHA 256: c67fd71e91304458a2feef5c91efa8677260fab0c0099a29a2c52cb579f5b2f3
Nano Banana 2 image SHA 256: 509871921c450f6f07ec28f91a380992db1b3017108fd5928fe0aa9670a1ecdc
Seedream 5.0 Flash image SHA 256: 3ea7343b12d253b6b0e090054c1e494f5a005632cc263a9b2df4d866ba6b02d0
Typography and layout
Nano Banana 2: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 1:59 PM. Source
Seedream 5.0 Flash: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.018000, generated Nov 1, 2026, 8:29 PM. Source
Protocol gradually-image-comparison-v1. Prompt SHA 256: 2e012c3d14ee5dd02203a94f394ca80a5038cdebd6032b25a8b8a221f2255419
Nano Banana 2 image SHA 256: 06ae79c07d1604d3da3bbfa80bac73ac15c88af5cb8c013faaf5c9ea93092305
Seedream 5.0 Flash image SHA 256: b9739c9a9ab67183f268f41b7ff62a9151cef9d0c8c168eba332a2b6af057426
The numbers at a glance
Nano Banana 2
Rank 8 of 22
Seedream 5.0 Flash
not in the arena
Nano Banana 2
Rank 40 of 74
Seedream 5.0 Flash
Rank 39 of 74
Nano Banana 2
fairly expensive
Seedream 5.0 Flash
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.
Nano Banana 2
- Subscription
- Free to use at Google (Google AI Free, with limited credits), more from €4.99 a month (Google AI Plus, with limited credits). Through other providers from ≈ €6.39 a month (ElevenLabs Starter, with limited credits). 68 plans in Germany.
- Via API
- $0.067 per image, 100 images $6.70.
Seedream 5.0 Flash
- Subscription
- No ByteDance subscription includes this model. Through other providers from €6.83 a month (Poe Basic, with limited points). 18 plans in Germany.
- Via API
- No API price known. Access: API.
- Weights
- unknown.
Subscriptions only count plans that name exactly this model. Subscription prices include VAT, API prices are in dollars.
Arena rating (LMArena) from Oct 28, 2026 · GraduallyBench from Nov 1, 2026 · API prices from Oct 28, 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 | Nano Banana 2 | Seedream 5.0 Flash |
|---|---|---|
| Ratings | ||
| Arena ratingfrom votes by users, higher is better | 1,257 | n/a |
| Arena rank | Rank 8 of 22 | n/a |
| Arena votesmore votes, a safer rating | 73,278 | n/a |
| GraduallyBenchour own rating, 0 to 100 | 55 | 56 |
| GraduallyBench by task | ||
| Typography and layoutLegible text, hierarchy, and composition | 78 | 61 |
| Product photographyMaterials, reflections, and fine details | 39 | 49 |
| Character and detailAnatomy, clothing, and spatial consistency | 62 | 34 |
| InfographicNumbers, labels, and visual organization | 43 | 79 |
| API price | ||
| Per imagelower is better | $0.067 | n/a |
| 100 images | $6.70 | n/a |
| Profile | ||
| Released | February 2026 | n/a |
| Weightsopen means: runs locally | proprietary | unknown |
| Lifecycle | Previous generation to Nano Banana 2.1; Google recommends Nano Banana 2.1 for all new projects, the stable API has existed since May 28, 2026 and no shutdown is announced, the arena entry names the earlier pre-release configuration | no notice |
| Access | API, Web app | API |
| Parameters | not published | not published |
| Largest output | 4K | not consistently published |
| Plans in Germanynaming exactly this model | 68 | 18 |
API prices for one image at 1,024 × 1,024 pixels according to Artificial Analysis.
Sources: Nano Banana 2 model source, status source (verified Aug 15, 2026) · Seedream 5.0 Flash 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 Nano Banana 2 and Seedream 5.0 Flash from the same arena and category. Older model versions are not used as substitutes.
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