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FLUX.2 Provs.Stable Diffusion 3.5 Large

Which one is better?

FLUX.2 Pro leads in both ratings: in our own test and in the arena. Both are in the lower half there, though. Stable Diffusion 3.5 Large has no API price.

Test images

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

FLUX.2 Pro: Character and detail, first image from the fixed test run
FLUX.2 Pro87 out of 100
Stable Diffusion 3.5 Large: Character and detail, first image from the fixed test run
Stable Diffusion 3.5 Large23 out of 100

Result for “Character and detail”:FLUX.2 Pro ahead

Prompt given to both modelsCreate a square cinematic full-body portrait of a fictional bicycle courier waiting under a transparent umbrella at a rainy tram stop in Hamburg at blue hour. She wears a mustard raincoat, navy trousers, red sneakers, a silver helmet, and carries a teal messenger bag. Keep both hands visible, render the bicycle correctly, use realistic wet-street reflections, and include no readable brand names.

What the rating looks at: Anatomy, clothing, and spatial consistency.

“Ahead”: better in all three rating rounds. “Slightly ahead”: a higher value, but not in every round.

Test protocol of the images

Each test attempt uses the same archived prompt and one request. The first output of that attempt counts. Repeats after technical test failures are disclosed for the affected images. 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.2 Pro: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:30 PM. Source

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

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

FLUX.2 Pro image SHA 256: 9eec1a6900b6031703d2e797b93c2aba6c5f45b4807b560a0bf1e37eac9e20f2

Stable Diffusion 3.5 Large image SHA 256: e748006fe56e442ad347e3f994f18b86ee1739f20dcee063aa7a03ee710c5d54

Infographic

FLUX.2 Pro: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:31 PM. Source

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

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

FLUX.2 Pro image SHA 256: ea47f772cdfa26bf21528ae7e09d245eb7a3be7d3185af15cedd7d21acdfbb09

Stable Diffusion 3.5 Large image SHA 256: 4eb0fd741ef42e6d3fee4b1280cdfb098a0a04009b139051963895892e349f1e

Product photography

FLUX.2 Pro: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:30 PM. Source

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

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

FLUX.2 Pro image SHA 256: 4d9b922f59b329c5ac3532222c8e340e7fdcb1920ce6f03ad9299f25a6beec43

Stable Diffusion 3.5 Large image SHA 256: ea9a7401dee8859ec2cb96af9f7ca29a177ef2202f52f629d8ce9f5839bd4061

Typography and layout

FLUX.2 Pro: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 2:02 PM. Source

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

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

FLUX.2 Pro image SHA 256: 5a5d8ccd657d7522bc39fdec4b0aecf198b42c282a5aefde9461239dfe5c0396

Stable Diffusion 3.5 Large image SHA 256: e2994b1883a245b1c8c447957d121ea89d93aafff149029aa4e8507dbb769f9a

The numbers at a glance

Arena ratingfrom votes by users · higher is better
1,153

FLUX.2 Pro

Rank 17 of 21

938

Stable Diffusion 3.5 Large

Rank 21 of 21

GraduallyBenchour own rating, 0 to 100 · higher is better
65

FLUX.2 Pro

Rank 41 of 108

27

Stable Diffusion 3.5 Large

Rank 87 of 108

Price per imagedollars through the API · lower is better
$0.03

FLUX.2 Pro

cheap

n/a

Stable Diffusion 3.5 Large

no API price

Ranks among the 21 image models with an arena rating and the 108 with a GraduallyBench run; prices compared with 28 models with an API price.

FLUX.2 Pro

Subscription
No Black Forest Labs subscription includes this model. Through other providers from ≈ €6.36 a month (ElevenLabs Starter, with limited credits). 43 plans in Germany.
Via API
$0.03 per image, 100 images $3.

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.

Subscriptions only count plans that name exactly this model. Subscription prices include VAT, API prices are in dollars.

Arena rating (LMArena) from Nov 6, 2026 · GraduallyBench from Nov 3, 2026 · API prices from Nov 6, 2026 · Subscription database from Sep 29, 2026 (38 days old)

All data side by side

The better value is bold. For ratings only when the gap is clear.

KennzahlFLUX.2 ProStable Diffusion 3.5 Large
Ratings
Arena ratingfrom votes by users, higher is better1,153938
Arena rankRank 17 of 21Rank 21 of 21
Arena votesmore votes, a safer rating226,24223,396
GraduallyBenchour own rating, 0 to 1006527
GraduallyBench by task
Typography and layoutLegible text, hierarchy, and composition6931
Product photographyMaterials, reflections, and fine details5817
Character and detailAnatomy, clothing, and spatial consistency8723
InfographicNumbers, labels, and visual organization4539
API price
Per imagelower is better$0.03n/a
100 images$3n/a
Profile
ReleasedNovember 2025Oct 22, 2024
Weightsopen means: runs locallyproprietaryopen
AccessAPI, Web appAPI, local
Parametersnot published8.1 billion
Largest output4 Megapixel1 Megapixel
Plans in Germanynaming exactly this model43n/a

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

Sources: FLUX.2 Pro model source (verified Sep 24, 2026) · Stable Diffusion 3.5 Large model source (verified Aug 15, 2026)

Arena ratings by category

From blind votes on LMArena. “Ahead” means the lead is clear.

Arena rating per categoryfrom votes by users · higher is betterFLUX.2 ProStable Diffusion 3.5 Large
Text to Image: 3D modelingFLUX.2 Pro: 1,145Stable Diffusion 3.5 Large: 963FLUX.2 Pro ahead
Text to Image: ArtFLUX.2 Pro: 1,159Stable Diffusion 3.5 Large: 997FLUX.2 Pro ahead
Text to Image: CartoonFLUX.2 Pro: 1,159Stable Diffusion 3.5 Large: 945FLUX.2 Pro ahead
Text to Image: Commercial designFLUX.2 Pro: 1,154Stable Diffusion 3.5 Large: 937FLUX.2 Pro ahead
Text to Image: OverallFLUX.2 Pro: 1,153Stable Diffusion 3.5 Large: 938FLUX.2 Pro ahead
Text to Image: PhotorealismFLUX.2 Pro: 1,152Stable Diffusion 3.5 Large: 928FLUX.2 Pro ahead
Text to Image: PortraitsFLUX.2 Pro: 1,144Stable Diffusion 3.5 Large: 942FLUX.2 Pro ahead
Text to Image: Text renderingFLUX.2 Pro: 1,154Stable Diffusion 3.5 Large: 921FLUX.2 Pro ahead

LMArena from Nov 6, 2026

All individual values with sources
RatingFLUX.2 ProStable Diffusion 3.5 LargeSource
Text to Image: 3D modeling1,145963LMArenaRetrieved Nov 6, 2026
Text to Image: Art1,159997LMArenaRetrieved Nov 6, 2026
Text to Image: Cartoon1,159945LMArenaRetrieved Nov 6, 2026
Text to Image: Commercial design1,154937LMArenaRetrieved Nov 6, 2026
Text to Image: Overall1,153938LMArenaRetrieved Nov 6, 2026
Text to Image: Photorealism1,152928LMArenaRetrieved Nov 6, 2026
Text to Image: Portraits1,144942LMArenaRetrieved Nov 6, 2026
Text to Image: Text rendering1,154921LMArenaRetrieved Nov 6, 2026

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