Nano Banana 2vs.FLUX.2 Klein 4B

Which one is better?

In our own test both are on par. FLUX.2 Klein 4B has no arena rating yet. FLUX.2 Klein 4B has no API price.

Same task, the first image of each. The task with the biggest difference is preselected.

Nano Banana 2: Typography and layout, first image from the fixed test run — Nano Banana 278 out of 100

FLUX.2 Klein 4B: Typography and layout, first image from the fixed test run — FLUX.2 Klein 4B21 out of 100

Result for “Typography and layout”:Nano Banana 2 ahead

Prompt given to both modelsCreate a square editorial poster for an imaginary night train called MONDFALTER. Show the exact German headline MONDFALTER and the exact subline BERLIN NACH LISSABON. Use a restrained midnight-blue and warm-cream palette, one stylized moth, strong Swiss-grid typography, generous negative space, and no additional words or logos.

What the rating looks at: Legible text, hierarchy, and composition.

“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

FLUX.2 Klein 4B: fal, requested 1024x1024, n=1, seed=707400387, Fal's published 4B text-to-image endpoint; default four inference steps, estimated cost $0.005000, generated Nov 1, 2026, 9:01 PM. Source

Protocol gradually-image-comparison-v1. Prompt SHA 256: 985a75b38642a9f0e5e0c0e0c67f1b7f67780d42bd2168fa24e9a7a7a94b0da6

Nano Banana 2 image SHA 256: 5d3a70ed3fe3328484725565d9c91fb25fc7f745bd66872dae432444493a83de

FLUX.2 Klein 4B image SHA 256: 170cebb7cf75bc033a92371199812674f9cfa9641d5e9fb13947ccf892d4ed53

Infographic

Nano Banana 2: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:15 PM. Source

FLUX.2 Klein 4B: fal, requested 1024x1024, n=1, seed=290140178, Fal's published 4B text-to-image endpoint; default four inference steps, estimated cost $0.005000, generated Nov 1, 2026, 9:01 PM. Source

Protocol gradually-image-comparison-v1. Prompt SHA 256: ed65cb4e6a51e2336f8b149ad4cbb16e020f07d527ad94362e719d2dcf91d94f

Nano Banana 2 image SHA 256: 66123dd4e8cd5d22ecdca9cca8e4c5853a8046370aa4861ffee807a8c122c769

FLUX.2 Klein 4B image SHA 256: 42b729a5a72207b5a92464f3ecf1713459ab1b105c3041c14b75c7622630015e

Product photography

Nano Banana 2: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:15 PM. Source

FLUX.2 Klein 4B: fal, requested 1024x1024, n=1, seed=1254275381, Fal's published 4B text-to-image endpoint; default four inference steps, estimated cost $0.005000, generated Nov 1, 2026, 9:00 PM. Source

Protocol gradually-image-comparison-v1. Prompt SHA 256: c67fd71e91304458a2feef5c91efa8677260fab0c0099a29a2c52cb579f5b2f3

Nano Banana 2 image SHA 256: 509871921c450f6f07ec28f91a380992db1b3017108fd5928fe0aa9670a1ecdc

FLUX.2 Klein 4B image SHA 256: 8fae4a7f6abb7467281c439dc93aa656031626f88c8a54f95f49850cbf045580

Typography and layout

Nano Banana 2: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 1:59 PM. Source

FLUX.2 Klein 4B: fal, requested 1024x1024, n=1, seed=1270698692, Fal's published 4B text-to-image endpoint; default four inference steps, estimated cost $0.005000, generated Nov 1, 2026, 9:00 PM. Source

Protocol gradually-image-comparison-v1. Prompt SHA 256: 2e012c3d14ee5dd02203a94f394ca80a5038cdebd6032b25a8b8a221f2255419

Nano Banana 2 image SHA 256: 06ae79c07d1604d3da3bbfa80bac73ac15c88af5cb8c013faaf5c9ea93092305

FLUX.2 Klein 4B image SHA 256: 7c2c3e30c20c98e90033087b2b95b151bddc3252dd4aed7092fcbca4ae4ea96e

The numbers at a glance

Arena ratingfrom votes by users · higher is better

1,257

Nano Banana 2

Rank 8 of 22

n/a

FLUX.2 Klein 4B

not in the arena

GraduallyBenchour own rating, 0 to 100 · higher is better

Nano Banana 2

Rank 40 of 74

FLUX.2 Klein 4B

Rank 55 of 74

Price per imagedollars through the API · lower is better

$0.067

Nano Banana 2

fairly expensive

n/a

FLUX.2 Klein 4B

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.

FLUX.2 Klein 4B

Subscription: No Black Forest Labs subscription includes this model. Through other providers from €6.83 a month (Poe Basic, with limited points). 12 plans in Germany.
Via API: No API price known. Access: API, local.
License: Open weights.

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	FLUX.2 Klein 4B
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	37
GraduallyBench by task
Typography and layoutLegible text, hierarchy, and composition	78	21
Product photographyMaterials, reflections, and fine details	39	54
Character and detailAnatomy, clothing, and spatial consistency	62	53
InfographicNumbers, labels, and visual organization	43	19
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	open
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, local
Parameters	not published	4 billion
Largest output	4K	not consistently published
Plans in Germanynaming exactly this model	68	12

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) · FLUX.2 Klein 4B 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 FLUX.2 Klein 4B from the same arena and category. Older model versions are not used as substitutes.

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More matchups

Compare Nano Banana 2 and FLUX.2 Klein 4B with other important image models.

View the complete image model comparison

Same prompt, two images

The numbers at a glance

Nano Banana 2

FLUX.2 Klein 4B

All data side by side

Arena ratings by category

No shared arena score in the stored snapshot

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