Stable Diffusion 3.5 Largevs.FLUX 3 Image Klein

Which one is better?

In our own test, FLUX 3 Image Klein leads. FLUX 3 Image Klein has no arena rating yet. Neither has an API price.

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

Stable Diffusion 3.5 Large: Typography and layout, first image from the fixed test run — Stable Diffusion 3.5 Large11 out of 100

FLUX 3 Image Klein: Typography and layout, first image from the fixed test run — FLUX 3 Image Klein86 out of 100

Result for “Typography and layout”:FLUX 3 Image Klein 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

Stable Diffusion 3.5 Large: fal, requested 1024x1024, n=1, seed=7087247023770270000, estimated cost $0.068157, generated Aug 14, 2026, 2:37 PM. Source

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

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

Stable Diffusion 3.5 Large image SHA 256: e748006fe56e442ad347e3f994f18b86ee1739f20dcee063aa7a03ee710c5d54

FLUX 3 Image Klein image SHA 256: b3331460097da628f405817301b99f206142350757be51bee5e406216ef8359f

Infographic

Stable Diffusion 3.5 Large: fal, requested 1024x1024, n=1, seed=12166653711354006000, estimated cost $0.068157, generated Aug 14, 2026, 2:37 PM. Source

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

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

Stable Diffusion 3.5 Large image SHA 256: 4eb0fd741ef42e6d3fee4b1280cdfb098a0a04009b139051963895892e349f1e

FLUX 3 Image Klein image SHA 256: 8f6c2d4ea5814181f198e45caf6b561a650145fccf667ecb5cace92c1fc3bbcb

Product photography

Stable Diffusion 3.5 Large: fal, requested 1024x1024, n=1, seed=13346308312015933000, estimated cost $0.068157, generated Aug 14, 2026, 2:37 PM. Source

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

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

Stable Diffusion 3.5 Large image SHA 256: ea9a7401dee8859ec2cb96af9f7ca29a177ef2202f52f629d8ce9f5839bd4061

FLUX 3 Image Klein image SHA 256: bafab00e86d3de8b29c6390b162e99291c84878c546246a95b5d47c6fe352fb9

Typography and layout

Stable Diffusion 3.5 Large: fal, requested 1024x1024, n=1, seed=16632333557910893000, estimated cost $0.068157, generated Aug 14, 2026, 2:37 PM. Source

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

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

Stable Diffusion 3.5 Large image SHA 256: e2994b1883a245b1c8c447957d121ea89d93aafff149029aa4e8507dbb769f9a

FLUX 3 Image Klein image SHA 256: 8f3f8cc9a1ab3c037f81a05bb3eec4e9a0129bad649347c4f40dc30c2870c0aa

The numbers at a glance

Arena ratingfrom votes by users · higher is better

938

Stable Diffusion 3.5 Large

Rank 22 of 22

n/a

FLUX 3 Image Klein

not in the arena

GraduallyBenchour own rating, 0 to 100 · higher is better

Stable Diffusion 3.5 Large

Rank 67 of 74

FLUX 3 Image Klein

Rank 9 of 74

Price per imagedollars through the API · lower is better

n/a

Stable Diffusion 3.5 Large

no API price

n/a

FLUX 3 Image Klein

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.

Stable Diffusion 3.5 Large

Subscription: n/a No plan in Germany names exactly this model.
Via API: No API price known. Access: API, local.
License: Open weights.

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.

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 · 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	Stable Diffusion 3.5 Large	FLUX 3 Image Klein
Ratings
Arena ratingfrom votes by users, higher is better	938	n/a
Arena rank	Rank 22 of 22	n/a
Arena votesmore votes, a safer rating	23,396	n/a
GraduallyBenchour own rating, 0 to 100	18	71
GraduallyBench by task
Typography and layoutLegible text, hierarchy, and composition	11	86
Product photographyMaterials, reflections, and fine details	14	43
Character and detailAnatomy, clothing, and spatial consistency	23	82
InfographicNumbers, labels, and visual organization	23	74
API price
Per imagelower is better	n/a	n/a
100 images	n/a	n/a
Profile
Released	Oct 22, 2024	Oct 15, 2026
Weightsopen means: runs locally	open	open
Access	API, local	API, local
Parameters	8.1 billion	5.6 billion
Largest output	1 Megapixel	4K
Plans in Germanynaming exactly this model	n/a	n/a

API prices for one image at 1,024 × 1,024 pixels according to Artificial Analysis.

Sources: Stable Diffusion 3.5 Large model source (verified Aug 15, 2026) · FLUX 3 Image Klein 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 Stable Diffusion 3.5 Large and FLUX 3 Image Klein from the same arena and category. Older model versions are not used as substitutes.

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First image modelSecond image model

More matchups

Compare Stable Diffusion 3.5 Large and FLUX 3 Image Klein with other important image models.

View the complete image model comparison

Same prompt, two images

The numbers at a glance

Stable Diffusion 3.5 Large

FLUX 3 Image Klein

All data side by side

Arena ratings by category

No shared arena score in the stored snapshot

Compare another matchup

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