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Head-to-head comparison

Luma UNI 1 Max vs. FLUX.2 Klein 9B

Compare arena scores with documented retrieval dates, task-specific image pricing, and verified specifications. Text-to-image generation and image editing are never blended into an artificial overall score.

2

shared result series

4

shared sample prompts

2026-08-15

latest arena retrieval

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Specifications and cost

General specifications and task-specific pricing

A model can have one price for generating new images and another for editing. Prices therefore remain tied to the corresponding arena configuration.

Specifications and pricing for Luma UNI 1 Max and FLUX.2 Klein 9B
AttributeLuma UNI 1 MaxFLUX.2 Klein 9B
ProviderLuma LabsBlack Forest Labs
ReleasedMay 2026January 2026
AccessAPI, Web appAPI, local
LifecycleNo separate lifecycle noticeNo separate lifecycle notice
WeightsProprietaryOpen weights
ParametersNot published9 billion
Maximum output2K4 Megapixel
Arena configurationMax9B
Text-to-image price$100 per 1,000 images$15 per 1,000 images
Editing price$100 per 1,000 images$17 per 1,000 images
Technical sourceModel sourceVerified 2026-08-15Model sourceVerified 2026-08-15
Luma UNI 1 MaxFLUX.2 Klein 9B
Text to Image ArenaUSD per 1,000 images at 1,024 × 1,024 pixels
Luma UNI 1 Max$100
FLUX.2 Klein 9B$15Lower price
Image Editing ArenaUSD per 1,000 images at 1,024 × 1,024 pixels
Luma UNI 1 Max$100
FLUX.2 Klein 9B$17Lower price

Independent preference tests

Shared arena benchmarks

Artificial Analysis and Arena derive scores from blind comparisons. Raters see outputs for the same prompt and choose the image they prefer. Separate series cover text rendering, photorealism, portraits, art, commercial design, and image editing. Confidence intervals indicate how certain a measured lead is.

2 shared result series
Luma UNI 1 MaxFLUX.2 Klein 9B
Text to Image ArenaBlind preference from the same prompt, higher is better
Luma UNI 1 Max1,226 EloHigher arena score
FLUX.2 Klein 9B1,149 Elo
Image Editing ArenaBlind preference from the same prompt, higher is better
Luma UNI 1 Max1,219 EloHigher arena score
FLUX.2 Klein 9B1,168 Elo
Arena benchmark scores for Luma UNI 1 Max and FLUX.2 Klein 9B
BenchmarkLuma UNI 1 MaxFLUX.2 Klein 9BSource
Text to Image Arena
1,226 EloHigher arena score
Rank 14, 95% confidence interval: ±10, 4,073 ratings
1,149 Elo
Rank 60, 95% confidence interval: ±9, 7,939 ratings
Artificial AnalysisRetrieved 2026-08-15
Image Editing Arena
1,219 EloHigher arena score
Rank 12, 95% confidence interval: ±8, 6,178 ratings
1,168 Elo
Rank 30, 95% confidence interval: ±7, 11,020 ratings
Artificial AnalysisRetrieved 2026-08-15

Visual comparison

Sample images from documented runs

Our images complement preference data, but do not replace it. The prompt, request count, and selection rule match. Provider resolution, quality tier, randomness, and prompt processing remain visible limitations, so this is not a fully controlled laboratory test.

Largely standardized comparison protocol. Both models receive the same archived prompt, 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. These images are a practical visual test, not a reconstruction of the arena configuration.

Character and detail

Anatomy, clothing, and spatial consistency

Luma UNI 1 Max, Character and detail
Luma UNI 1 Max
FLUX.2 Klein 9B, Character and detail
FLUX.2 Klein 9B
Prompt and settings

Create 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.

Luma UNI 1 Max. Provider fal.ai, aspect ratio 1:1, n=1, seed=provider random, estimated cost $0.102000, source 2048x2048, stored 1024x1024 (Lanczos3 downscale), model ID luma/agent/uni-1/v1/max, generated Aug 14, 2026, 1:47 PM. Source
FLUX.2 Klein 9B. Provider fal.ai, requested 1024x1024, n=1, seed=1587849924, estimated cost $0.006291, model ID fal-ai/flux-2/klein/9b, generated Aug 14, 2026, 1:52 PM. Source

Protocol gradually-image-comparison-v1, selection rule: first result.

Prompt SHA 256: 985a75b38642a9f0e5e0c0e0c67f1b7f67780d42bd2168fa24e9a7a7a94b0da6

Luma UNI 1 Max, image SHA 256: 8034ca5627e1a256cdf1d06fc87b583d91d971d02edc9af7df52cd6721d3ea9c

Luma UNI 1 Max, request SHA 256: 81275c8abc4186d3dd5205d2f141c1ac6765e2217b9c7ea23caa622a232ab8a5

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

FLUX.2 Klein 9B, request SHA 256: 5d005ee24926d68b7d2299b8ecbe4e14919f652761f6de2568a043f2a6258da0

Infographic

Numbers, labels, and visual organization

Luma UNI 1 Max, Infographic
Luma UNI 1 Max
FLUX.2 Klein 9B, Infographic
FLUX.2 Klein 9B
Prompt and settings

Create 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.

Luma UNI 1 Max. Provider fal.ai, aspect ratio 1:1, n=1, seed=provider random, estimated cost $0.102000, source 2048x2048, stored 1024x1024 (Lanczos3 downscale), model ID luma/agent/uni-1/v1/max, generated Aug 14, 2026, 1:49 PM. Source
FLUX.2 Klein 9B. Provider fal.ai, requested 1024x1024, n=1, seed=1082231541, estimated cost $0.006291, model ID fal-ai/flux-2/klein/9b, generated Aug 14, 2026, 1:52 PM. Source

Protocol gradually-image-comparison-v1, selection rule: first result.

Prompt SHA 256: ed65cb4e6a51e2336f8b149ad4cbb16e020f07d527ad94362e719d2dcf91d94f

Luma UNI 1 Max, image SHA 256: 36dea214eb680804d4fea089eec3d4f10a4bf7b7a71c7a80f92313a37e8c2f73

Luma UNI 1 Max, request SHA 256: b99624302d834bf44e21100914a69d38225d34be413ad69decf73e2ad3a70c71

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

FLUX.2 Klein 9B, request SHA 256: 8b8014fc63f520d73ff57d3d8df5eae880097383167d44918b963f2830d09940

Product photography

Materials, reflections, and fine details

Luma UNI 1 Max, Product photography
Luma UNI 1 Max
FLUX.2 Klein 9B, Product photography
FLUX.2 Klein 9B
Prompt and settings

Create 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.

Luma UNI 1 Max. Provider fal.ai, aspect ratio 1:1, n=1, seed=provider random, estimated cost $0.102000, source 2048x2048, stored 1024x1024 (Lanczos3 downscale), model ID luma/agent/uni-1/v1/max, generated Aug 14, 2026, 1:43 PM. Source
FLUX.2 Klein 9B. Provider fal.ai, requested 1024x1024, n=1, seed=1388538280, estimated cost $0.006291, model ID fal-ai/flux-2/klein/9b, generated Aug 14, 2026, 1:39 PM. Source

Protocol gradually-image-comparison-v1, selection rule: first result.

Prompt SHA 256: c67fd71e91304458a2feef5c91efa8677260fab0c0099a29a2c52cb579f5b2f3

Luma UNI 1 Max, image SHA 256: 4890cdf8b858c5740124e3b2ba038b73f6a35decc7e3e3d920890462b6e89c2b

Luma UNI 1 Max, request SHA 256: 3f4a422b01687a8af7e9ef60e1b5a15251459af4c4ab6a6318a13f5b415a2b54

FLUX.2 Klein 9B, image SHA 256: e7208f19ccfb9b810b9648cb1861797b7155ad91933d1660059236cef413ebe0

FLUX.2 Klein 9B, request SHA 256: 21e2c14d1b6315c30134e1390f531349608855d4ef1a87527e6d0ba57b2974ca

Typography and layout

Legible text, hierarchy, and composition

Luma UNI 1 Max, Typography and layout
Luma UNI 1 Max
FLUX.2 Klein 9B, Typography and layout
FLUX.2 Klein 9B
Prompt and settings

Create a square editorial poster for an imaginary night train called MONDFALTER. Show the exact German headline MONDFALTER and the exact subline BERLIN NACH LISSABON. Use a restrained midnight-blue and warm-cream palette, one stylized moth, strong Swiss-grid typography, generous negative space, and no additional words or logos.

Luma UNI 1 Max. Provider fal.ai, aspect ratio 1:1, n=1, seed=provider random, estimated cost $0.102000, source 2048x2048, stored 1024x1024 (Lanczos3 downscale), model ID luma/agent/uni-1/v1/max, generated Aug 14, 2026, 2:40 PM. Source
FLUX.2 Klein 9B. Provider fal.ai, requested 1024x1024, n=1, seed=1340991019, estimated cost $0.006291, model ID fal-ai/flux-2/klein/9b, generated Aug 14, 2026, 2:41 PM. Source

Protocol gradually-image-comparison-v1, selection rule: first result.

Prompt SHA 256: 2e012c3d14ee5dd02203a94f394ca80a5038cdebd6032b25a8b8a221f2255419

Luma UNI 1 Max, image SHA 256: d2a6162d544def0a283ed62f939b33252636d296a21142111851ecdedd2989d3

Luma UNI 1 Max, request SHA 256: 31b38cf7833b7ed265ab47297533faea410b463cf427ee9c8bfc269ed47d0ddb

FLUX.2 Klein 9B, image SHA 256: c5f23870e70f2245d24a3689f2579ceb770e5edf8c3c89b7d6ed7ae138f262f6

FLUX.2 Klein 9B, request SHA 256: 530872e813e988ba95025956a3743c6111120af963d90b8970a8bf3eced5547b

How to read this comparison

An Elo score is not a verdict on creativity

A higher arena score means this specific configuration was preferred more often in blind comparisons.

Typography, character consistency, local execution, licensing, and price may matter more to your workload than overall visual appeal.

Prices cover 1,000 images at 1,024 × 1,024 pixels using settings documented by Artificial Analysis. Subscriptions and special rates are excluded.

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