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FLUX.2 Klein 9Bvs.Ideogram 4.5

Which one is better?

In our own test both are on par. Ideogram 4.5 has no arena rating yet. Ideogram 4.5 costs 6.7 times as much per image.

Same prompt, two images

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

FLUX.2 Klein 9B: Infographic, first image from the fixed test run
FLUX.2 Klein 9B26 out of 100
Ideogram 4.5: Infographic, first image from the fixed test run
Ideogram 4.582 out of 100

Result for “Infographic”:Ideogram 4.5 ahead

Prompt given to both modelsCreate a square German infographic titled SO FUNKTIONIERT PHOTOSYNTHESE. Show exactly four numbered steps in this order: 1 LICHT, 2 WASSER, 3 CO₂, 4 ZUCKER + SAUERSTOFF. Use a clean editorial science style with one plant cross-section, simple arrows, high contrast, legible labels, and no other text.

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

FLUX.2 Klein 9B: fal, requested 1024x1024, n=1, seed=1587849924, estimated cost $0.006291, generated Aug 14, 2026, 1:52 PM. Source

Ideogram 4.5: fal, requested 1024x1024, n=1, seed=676327336, prompt expansion disabled, quality low, estimated cost $0.030000, generated Nov 1, 2026, 8:44 PM. Source

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

FLUX.2 Klein 9B image SHA 256: 84eceab680e59de6b9d4e68b3c21f6515ce093ff7d110992049e847570dd565f

Ideogram 4.5 image SHA 256: 765cb852ecb10a396bad4bd18c2dc9fcc77221ffff3f0b94ef9eccf4d190b418

Infographic

FLUX.2 Klein 9B: fal, requested 1024x1024, n=1, seed=1082231541, estimated cost $0.006291, generated Aug 14, 2026, 1:52 PM. Source

Ideogram 4.5: fal, requested 1024x1024, n=1, seed=1482950298, prompt expansion disabled, quality low, estimated cost $0.030000, generated Nov 1, 2026, 8:44 PM. Source

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

FLUX.2 Klein 9B image SHA 256: 1d2eb263ca5a25794a88df7bb04f5c13e10ed9a289371d1dcc7ed6d6e0a297e2

Ideogram 4.5 image SHA 256: c97b4321e68bf1617a4dc96b5e1f9372344b09b9ff987f07d0e9813e6210c656

Product photography

FLUX.2 Klein 9B: fal, requested 1024x1024, n=1, seed=1388538280, estimated cost $0.006291, generated Aug 14, 2026, 1:39 PM. Source

Ideogram 4.5: fal, requested 1024x1024, n=1, seed=1376877115, prompt expansion disabled, quality low, estimated cost $0.030000, generated Nov 1, 2026, 8:44 PM. Source

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

FLUX.2 Klein 9B image SHA 256: e7208f19ccfb9b810b9648cb1861797b7155ad91933d1660059236cef413ebe0

Ideogram 4.5 image SHA 256: b9427281a64b3103f52f439b8797bd11763f813a8ef142bf79d96e936b349ae1

Typography and layout

FLUX.2 Klein 9B: fal, requested 1024x1024, n=1, seed=1340991019, estimated cost $0.006291, generated Aug 14, 2026, 2:41 PM. Source

Ideogram 4.5: fal, requested 1024x1024, n=1, seed=988679089, prompt expansion disabled, quality low, estimated cost $0.030000, generated Nov 1, 2026, 8:44 PM. Source

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

FLUX.2 Klein 9B image SHA 256: c5f23870e70f2245d24a3689f2579ceb770e5edf8c3c89b7d6ed7ae138f262f6

Ideogram 4.5 image SHA 256: ebe1fe3dccf258807db9a9063c1034185c1b3e91f0d8c9bd86c53525d374dd9c

The numbers at a glance

Arena ratingfrom votes by users · higher is better
1,070

FLUX.2 Klein 9B

Rank 21 of 22

n/a

Ideogram 4.5

not in the arena

GraduallyBenchour own rating, 0 to 100 · higher is better
45

FLUX.2 Klein 9B

Rank 50 of 74

56

Ideogram 4.5

Rank 38 of 74

Price per imagedollars through the API · lower is better
$0.015

FLUX.2 Klein 9B

cheap

$0.10

Ideogram 4.5

expensive

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.

FLUX.2 Klein 9B

Subscription
n/a No plan in Germany names exactly this model.
Via API
$0.015 per image, 100 images $1.50.
License
Open weights, Weights released under the FLUX Non-Commercial License.

Ideogram 4.5

Subscription
No Ideogram subscription includes this model. Through other providers from ≈ €9.59 a month (Krea Basic, with limited credits). 33 plans in Germany.
Via API
$0.10 per image, 100 images $10.
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.

KennzahlFLUX.2 Klein 9BIdeogram 4.5
Ratings
Arena ratingfrom votes by users, higher is better1,070n/a
Arena rankRank 21 of 22n/a
Arena votesmore votes, a safer rating150,695n/a
GraduallyBenchour own rating, 0 to 1004556
GraduallyBench by task
Typography and layoutLegible text, hierarchy, and composition2216
Product photographyMaterials, reflections, and fine details7259
Character and detailAnatomy, clothing, and spatial consistency5968
InfographicNumbers, labels, and visual organization2682
API price
Per imagelower is better$0.015$0.10
100 images$1.50$10
Profile
ReleasedJanuary 2026n/a
Weightsopen means: runs locallyopenWeights released under the FLUX Non-Commercial Licenseunknown
AccessAPI, localAPI
Parameters9 billionnot published
Largest output4 Megapixelnot consistently published
Plans in Germanynaming exactly this modeln/a33

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

Sources: FLUX.2 Klein 9B model source, status source (verified Sep 24, 2026) · Ideogram 4.5 model source (verified Nov 1, 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 Klein 9BIdeogram 4.5
Text to Image ArenaFLUX.2 Klein 9B: 929Ideogram 4.5: 1,015Ideogram 4.5 ahead
Image Editing ArenaFLUX.2 Klein 9B: 1,015Ideogram 4.5: 1,070Ideogram 4.5 ahead
Image Editing: Multi-image editingFLUX.2 Klein 9B: 1,212Ideogram 4.5: 1,337Ideogram 4.5 ahead
Image Editing: OverallFLUX.2 Klein 9B: 1,224Ideogram 4.5: 1,347Ideogram 4.5 ahead

Artificial Analysis from Oct 28, 2026 · LMArena from Oct 28, 2026

All individual values with sources
RatingFLUX.2 Klein 9BIdeogram 4.5Source
Text to Image Arena9291,015Artificial AnalysisRetrieved Oct 28, 2026
Image Editing Arena1,0151,070Artificial AnalysisRetrieved Oct 28, 2026
Image Editing: Multi-image editing1,2121,337LMArenaRetrieved Oct 28, 2026
Image Editing: Overall1,2241,347LMArenaRetrieved Oct 28, 2026

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