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GPT Image 1 Minivs.FLUX.2 Klein 4B

Which one is better?

In our own test both are on par. Neither is in the arena. Neither has an API price.

Same prompt, two images

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

GPT Image 1 Mini: Character and detail, first image from the fixed test run
GPT Image 1 Mini8 out of 100
FLUX.2 Klein 4B: Character and detail, first image from the fixed test run
FLUX.2 Klein 4B53 out of 100

Result for “Character and detail”:FLUX.2 Klein 4B 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

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

GPT Image 1 Mini: fal, requested 1024x1024, n=1, seed=provider random, quality low, Fal rounds per-request image plus text-token cost up to $0.01 for the fixed prompts, estimated cost $0.010000, generated Nov 1, 2026, 8:52 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

GPT Image 1 Mini image SHA 256: c0e2174457ec7197947f10d76d4c5a8fa49aec091b31652f0247cf7e11e903ba

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

Infographic

GPT Image 1 Mini: fal, requested 1024x1024, n=1, seed=provider random, quality low, Fal rounds per-request image plus text-token cost up to $0.01 for the fixed prompts, estimated cost $0.010000, generated Nov 1, 2026, 8:52 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

GPT Image 1 Mini image SHA 256: 08bac6b96a08de0ca51bedd1b6f0648e65d24461446b15231e80f668aaf6d603

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

Product photography

GPT Image 1 Mini: fal, requested 1024x1024, n=1, seed=provider random, quality low, Fal rounds per-request image plus text-token cost up to $0.01 for the fixed prompts, estimated cost $0.010000, generated Nov 1, 2026, 8:51 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

GPT Image 1 Mini image SHA 256: a5e15f006cd5c689b9588fa55b37ea0d610cd9edb4bd167fabefda5d72f21480

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

Typography and layout

GPT Image 1 Mini: fal, requested 1024x1024, n=1, seed=provider random, quality low, Fal rounds per-request image plus text-token cost up to $0.01 for the fixed prompts, estimated cost $0.010000, generated Nov 1, 2026, 8:51 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

GPT Image 1 Mini image SHA 256: 16fcb3be0f7ea7a48eabaacb5052ebccc221c00dd9ed3ff9d8e2f38f91b66c15

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

The numbers at a glance

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

GPT Image 1 Mini

not in the arena

n/a

FLUX.2 Klein 4B

not in the arena

GraduallyBenchour own rating, 0 to 100 · higher is better
26

GPT Image 1 Mini

Rank 60 of 74

37

FLUX.2 Klein 4B

Rank 55 of 74

Price per imagedollars through the API · lower is better
n/a

GPT Image 1 Mini

no API price

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.

GPT Image 1 Mini

Subscription
No OpenAI subscription includes this model. Through other providers from €6.83 a month (Poe Basic, with limited points). 14 plans in Germany.
Via API
No API price known. Access: API.
Weights
unknown.

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.

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.

KennzahlGPT Image 1 MiniFLUX.2 Klein 4B
Ratings
Arena ratingfrom votes by users, higher is bettern/an/a
Arena rankn/an/a
Arena votesmore votes, a safer ratingn/an/a
GraduallyBenchour own rating, 0 to 1002637
GraduallyBench by task
Typography and layoutLegible text, hierarchy, and composition4721
Product photographyMaterials, reflections, and fine details4354
Character and detailAnatomy, clothing, and spatial consistency853
InfographicNumbers, labels, and visual organization819
API price
Per imagelower is bettern/an/a
100 imagesn/an/a
Profile
Releasedn/an/a
Weightsopen means: runs locallyunknownopen
LifecycleDeprecated; API shutdown announced for December 1, 2026no notice
AccessAPIAPI, local
Parametersnot published4 billion
Largest outputnot consistently publishednot consistently published
Plans in Germanynaming exactly this model1412

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

Sources: GPT Image 1 Mini model source, status source (verified Nov 1, 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 GPT Image 1 Mini and FLUX.2 Klein 4B from the same arena and category. Older model versions are not used as substitutes.

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