Qwen Image 2.1 Provs.FLUX.2 Klein 4B

Which one is better?

In our own test, Qwen Image 2.1 Pro leads. Neither is in the arena. Neither has an API price.

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

Qwen Image 2.1 Pro: Product photography, first image from the fixed test run — Qwen Image 2.1 Pro87 out of 100

FLUX.2 Klein 4B: Product photography, first image from the fixed test run — FLUX.2 Klein 4B54 out of 100

Result for “Product photography”:Qwen Image 2.1 Pro ahead

Prompt given to both modelsCreate a square premium product photograph of a brushed titanium wristwatch standing upright on dark green marble. The watch has a cream dial, thin black hands set to 10:10, twelve distinct hour markers, a realistic crown, and a dark brown leather strap. Soft window light from the left, controlled reflections, shallow depth of field, no text, no logo, no extra objects.

What the rating looks at: Materials, reflections, and fine details.

“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

Qwen Image 2.1 Pro: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.046000, generated Nov 1, 2026, 8:37 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

Qwen Image 2.1 Pro image SHA 256: 5cc1b66564896a15198281314423f63a70fd897c4542588230dfe0e946beb76c

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

Infographic

Qwen Image 2.1 Pro: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.046000, generated Nov 1, 2026, 8:37 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

Qwen Image 2.1 Pro image SHA 256: f1eee1f8f0d3355879d5c91b7ae006a95b0511a37f7382b8f6241cb22b3959a0

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

Product photography

Qwen Image 2.1 Pro: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.046000, generated Nov 1, 2026, 8:36 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

Qwen Image 2.1 Pro image SHA 256: 08d93301c324d132b3f5df149f95d57d725c068e6f15b193521f1eb253a1f176

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

Typography and layout

Qwen Image 2.1 Pro: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.046000, generated Nov 1, 2026, 8:36 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

Qwen Image 2.1 Pro image SHA 256: 31be32c6b34f27d2ff60eae3979c211ba8c2e0296595ec13e62f6f249c967058

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

The numbers at a glance

Arena ratingfrom votes by users · higher is better

n/a

Qwen Image 2.1 Pro

not in the arena

n/a

FLUX.2 Klein 4B

not in the arena

GraduallyBenchour own rating, 0 to 100 · higher is better

Qwen Image 2.1 Pro

Rank 45 of 74

FLUX.2 Klein 4B

Rank 55 of 74

Price per imagedollars through the API · lower is better

n/a

Qwen Image 2.1 Pro

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.

Qwen Image 2.1 Pro

Subscription: n/a No plan in Germany names exactly this model.
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.

Kennzahl	Qwen Image 2.1 Pro	FLUX.2 Klein 4B
Ratings
Arena ratingfrom votes by users, higher is better	n/a	n/a
Arena rank	n/a	n/a
Arena votesmore votes, a safer rating	n/a	n/a
GraduallyBenchour own rating, 0 to 100	52	37
GraduallyBench by task
Typography and layoutLegible text, hierarchy, and composition	29	21
Product photographyMaterials, reflections, and fine details	87	54
Character and detailAnatomy, clothing, and spatial consistency	67	53
InfographicNumbers, labels, and visual organization	26	19
API price
Per imagelower is better	n/a	n/a
100 images	n/a	n/a
Profile
Released	n/a	n/a
Weightsopen means: runs locally	unknown	open
Access	API	API, local
Parameters	not published	4 billion
Largest output	2K	not consistently published
Plans in Germanynaming exactly this model	n/a	12

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

Sources: Qwen Image 2.1 Pro model 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 Qwen Image 2.1 Pro and FLUX.2 Klein 4B from the same arena and category. Older model versions are not used as substitutes.

Compare another matchup

First image modelSecond image model

More matchups

Compare Qwen Image 2.1 Pro and FLUX.2 Klein 4B with other important image models.

View the complete image model comparison

Same prompt, two images

The numbers at a glance

Qwen Image 2.1 Pro

FLUX.2 Klein 4B

All data side by side

Arena ratings by category

No shared arena score in the stored snapshot

Compare another matchup

Related image model comparisons