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MAI-Image-2.5 Flashvs.Stable Diffusion 3.5 Large

Which one is better?

In our own test, MAI-Image-2.5 Flash leads. MAI-Image-2.5 Flash has no arena rating yet. 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.

MAI-Image-2.5 Flash: Character and detail, first image from the fixed test run
MAI-Image-2.5 Flash68 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”:MAI-Image-2.5 Flash 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

MAI-Image-2.5 Flash: manual, Official Bing Image Creator web app; MAI-Image-2.5-Flash; one request; 1:1; first result; free guest generation; 2026-08-14; https://www.bing.com/images/create/ai-image-generator, generated Aug 14, 2026, 4:23 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

MAI-Image-2.5 Flash image SHA 256: a2637943faf5ae5210c69f645f96c70ea0a1d267c38a64705810947d2ba78dc8

Stable Diffusion 3.5 Large image SHA 256: e748006fe56e442ad347e3f994f18b86ee1739f20dcee063aa7a03ee710c5d54

Infographic

MAI-Image-2.5 Flash: manual, Official Bing Image Creator web app; MAI-Image-2.5-Flash; one request; 1:1; first result; free guest generation; 2026-08-14; https://www.bing.com/images/create/ai-image-generator, generated Aug 14, 2026, 4:23 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

MAI-Image-2.5 Flash image SHA 256: 6af00e502934a24a9e535b3f72d9b1ca545a984fc463e785ffe796a700e015b3

Stable Diffusion 3.5 Large image SHA 256: 4eb0fd741ef42e6d3fee4b1280cdfb098a0a04009b139051963895892e349f1e

Product photography

MAI-Image-2.5 Flash: manual, Official Bing Image Creator web app; MAI-Image-2.5-Flash; one request; 1:1; first result; free guest generation; 2026-08-14; https://www.bing.com/images/create/ai-image-generator, generated Aug 14, 2026, 4:23 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

MAI-Image-2.5 Flash image SHA 256: 9cb652604f7c64d8ebaa4303e924155a1f45581a940045be12775419e635bd8f

Stable Diffusion 3.5 Large image SHA 256: ea9a7401dee8859ec2cb96af9f7ca29a177ef2202f52f629d8ce9f5839bd4061

Typography and layout

MAI-Image-2.5 Flash: manual, Official Bing Image Creator web app; MAI-Image-2.5-Flash; one request; 1:1; first result; free guest generation; 2026-08-14; https://www.bing.com/images/create/ai-image-generator, generated Aug 14, 2026, 4:22 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

MAI-Image-2.5 Flash image SHA 256: 185a852b71d68ea37a41091b57f3ec02829b2d1e87fd1045939ffa0f8e4c3cf8

Stable Diffusion 3.5 Large image SHA 256: e2994b1883a245b1c8c447957d121ea89d93aafff149029aa4e8507dbb769f9a

The numbers at a glance

Arena ratingfrom votes by users · higher is better
n/a

MAI-Image-2.5 Flash

not in the arena

938

Stable Diffusion 3.5 Large

Rank 21 of 21

GraduallyBenchour own rating, 0 to 100 · higher is better
69

MAI-Image-2.5 Flash

Rank 24 of 108

27

Stable Diffusion 3.5 Large

Rank 87 of 108

Price per imagedollars through the API · lower is better
$0.02

MAI-Image-2.5 Flash

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.

MAI-Image-2.5 Flash

Subscription
n/a No plan in Germany names exactly this model.
Via API
$0.02 per image, 100 images $2.

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.

KennzahlMAI-Image-2.5 FlashStable Diffusion 3.5 Large
Ratings
Arena ratingfrom votes by users, higher is bettern/a938
Arena rankn/aRank 21 of 21
Arena votesmore votes, a safer ratingn/a23,396
GraduallyBenchour own rating, 0 to 1006927
GraduallyBench by task
Typography and layoutLegible text, hierarchy, and composition7031
Product photographyMaterials, reflections, and fine details5817
Character and detailAnatomy, clothing, and spatial consistency6823
InfographicNumbers, labels, and visual organization8139
API price
Per imagelower is better$0.02n/a
100 images$2n/a
Profile
ReleasedJune 2026Oct 22, 2024
Weightsopen means: runs locallyproprietaryopen
LifecyclePreview in Microsoft Foundryno notice
AccessAPI, Web appAPI, local
Parameters20 billion8.1 billion
Largest output1,048,576 pixels1 Megapixel
Plans in Germanynaming exactly this modeln/an/a

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

Sources: MAI-Image-2.5 Flash model source, status source (verified Sep 22, 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.

No shared arena score in the stored snapshot

The stored benchmark database contains no measurement for MAI-Image-2.5 Flash and Stable Diffusion 3.5 Large from the same arena and category. Older model versions are not used as substitutes.

More comparisons

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