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Head-to-head comparison

FLUX.2 Flex vs. FLUX.2 Pro

Compare shared capability tests, arena scores with documented retrieval dates, task-specific image pricing, and verified specifications. Research benchmarks, preference arenas, and our n = 1 samples remain separate.

shared result series
16
shared sample prompts
4
latest arena retrieval
2026-09-22

Change image model selection

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 FLUX.2 Flex and FLUX.2 Pro
AttributeFLUX.2 FlexFLUX.2 Pro
ProviderBlack Forest LabsBlack Forest Labs
ReleasedNovember 2025November 2025
AccessAPI, Web appAPI, Web app
LifecycleNo separate lifecycle noticeNo separate lifecycle notice
WeightsProprietaryProprietary
ParametersNot publishedNot published
Maximum output4 Megapixel4 Megapixel
Arena configurationFlexPro
Text-to-image price$60 per 1,000 images$30 per 1,000 images
Editing price$120 per 1,000 images$45 per 1,000 images
Technical sourceModel sourceVerified 2026-09-24Model sourceVerified 2026-09-24
FLUX.2 FlexFLUX.2 Pro
Text to Image ArenaUSD per 1,000 images at 1,024 × 1,024 pixels
FLUX.2 Flex$60
FLUX.2 ProLower price$30
Image Editing ArenaUSD per 1,000 images at 1,024 × 1,024 pixels
FLUX.2 Flex$120
FLUX.2 ProLower price$45

Key to the marks:better valuebetter, but not conclusivetie

Prompt adherence and specialist tests

Shared capability benchmarks

Both checkpoints completed the same four Gradually sample tasks. For each task, 30 archived first outputs are ranked in three differently ordered, model-blind passes. The published 0-100 value normalizes the mean rank. It must still be read as an n = 1 sample per model. No exact shared result from the integrated research benchmarks is available for this pair.

FLUX.2 FlexFLUX.2 Pro
Gradually sample test: Typography and layoutMean of three blind ranks across all 30 first outputs, n = 1 each
FLUX.2 FlexHigher blind-rank score66.7 / 100
FLUX.2 Pro49.4 / 100
Gradually sample test: Product photographyMean of three blind ranks across all 30 first outputs, n = 1 each
FLUX.2 FlexHigher blind-rank score52.9 / 100
FLUX.2 Pro51.7 / 100
Gradually sample test: Character and detailMean of three blind ranks across all 30 first outputs, n = 1 each
FLUX.2 Flex54 / 100
FLUX.2 ProHigher blind-rank score60.9 / 100
Gradually sample test: InfographicMean of three blind ranks across all 30 first outputs, n = 1 each
FLUX.2 FlexHigher blind-rank score24.1 / 100
FLUX.2 Pro21.8 / 100

Key to the marks:better valuebetter, but not conclusivetie

Capability benchmark scores for FLUX.2 Flex and FLUX.2 Pro
BenchmarkFLUX.2 FlexFLUX.2 Pro
Gradually sample test: Typography and layout
Higher blind-rank score66.7 / 100
Mean rank: 10.67 (17 / 12 / 3)
Five rubric scores
Headline: 1.67 / 2
Subline: 1.67 / 2
Text control: 1.67 / 2
Visual brief: 1.67 / 2
Layout: 1.33 / 2
49.4 / 100
Mean rank: 15.67 (19 / 13 / 15)
Five rubric scores
Headline: 1.67 / 2
Subline: 1.67 / 2
Text control: 1.67 / 2
Visual brief: 1.33 / 2
Layout: 1 / 2
Gradually sample test: Product photography
Higher blind-rank score52.9 / 100
Mean rank: 14.67 (14 / 16 / 14)
Five rubric scores
Subject: 1.67 / 2
Time: 1.67 / 2
Watch details: 1.67 / 2
Photography: 1.67 / 2
Exclusions: 1.67 / 2
51.7 / 100
Mean rank: 15 (17 / 15 / 13)
Five rubric scores
Subject: 1.67 / 2
Time: 1.67 / 2
Watch details: 1.67 / 2
Photography: 1.67 / 2
Exclusions: 1.67 / 2
Gradually sample test: Character and detail
54 / 100
Mean rank: 14.33 (16 / 20 / 7)
Five rubric scores
Scene: 1 / 2
Wardrobe: 1 / 2
Anatomy: 1 / 2
Props: 1 / 2
Environment: 1 / 2
Higher blind-rank score60.9 / 100
Mean rank: 12.33 (15 / 12 / 10)
Five rubric scores
Scene: 1 / 2
Wardrobe: 1 / 2
Anatomy: 1 / 2
Props: 1 / 2
Environment: 1 / 2
Gradually sample test: Infographic
Higher blind-rank score24.1 / 100
Mean rank: 23 (22 / 24 / 23)
Five rubric scores
Title: 1.67 / 2
Sequence: 1.33 / 2
Labels: 0.67 / 2
Diagram: 1 / 2
Clarity: 0.67 / 2
21.8 / 100
Mean rank: 23.67 (24 / 25 / 22)
Five rubric scores
Title: 1.67 / 2
Sequence: 1.33 / 2
Labels: 0.33 / 2
Diagram: 0.67 / 2
Clarity: 0.67 / 2

Key to the marks:better valuebetter, but not conclusivetie

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.

12 shared result series
FLUX.2 FlexFLUX.2 Pro
Text to Image ArenaBlind preference from the same prompt, higher is better
FLUX.2 FlexHigher score1,026 Elo
FLUX.2 Pro1,001 Elo
Image Editing ArenaBlind preference from the same prompt, higher is better
FLUX.2 Flex1,006 Elo
FLUX.2 ProNo clear lead1,008 Elo
LMArena Text to Image: 3D modelingBlind preference from the same prompt, higher is better
FLUX.2 FlexHigher score1,172.339
FLUX.2 Pro1,147.767
LMArena Text to Image: ArtBlind preference from the same prompt, higher is better
FLUX.2 Flex1,155.555
FLUX.2 ProNo clear lead1,162.175
LMArena Text to Image: CartoonBlind preference from the same prompt, higher is better
FLUX.2 FlexNo clear lead1,162.266
FLUX.2 Pro1,160.398
LMArena Text to Image: Commercial designBlind preference from the same prompt, higher is better
FLUX.2 FlexHigher score1,173.172
FLUX.2 Pro1,155.351
LMArena Text to Image: OverallBlind preference from the same prompt, higher is better
FLUX.2 FlexNo clear lead1,156.503
FLUX.2 Pro1,153.926
LMArena Text to Image: PhotorealismBlind preference from the same prompt, higher is better
FLUX.2 Flex1,146.875
FLUX.2 ProNo clear lead1,152.003
LMArena Text to Image: PortraitsBlind preference from the same prompt, higher is better
FLUX.2 Flex1,144.629
FLUX.2 ProNo clear lead1,144.638
LMArena Text to Image: Text renderingBlind preference from the same prompt, higher is better
FLUX.2 FlexHigher score1,171.992
FLUX.2 Pro1,155.146
LMArena Image Editing: Multi-image editingBlind preference from the same prompt, higher is better
FLUX.2 Flex1,234.148
FLUX.2 ProNo clear lead1,240.557
LMArena Image Editing: OverallBlind preference from the same prompt, higher is better
FLUX.2 Flex1,225.241
FLUX.2 ProHigher score1,244.7

Key to the marks:better valuebetter, but not conclusivetie

Arena benchmark scores for FLUX.2 Flex and FLUX.2 Pro
BenchmarkFLUX.2 FlexFLUX.2 ProSource
Text to Image Arena
Higher score1,026 Elo
Rank 21, 95% confidence interval: ±9, 5,931 ratings
1,001 Elo
Rank 39, 95% confidence interval: ±8, 10,492 ratings
Artificial AnalysisRetrieved 2026-09-22
Image Editing Arena
1,006 Elo
Rank 38, 95% confidence interval: ±8, 5,601 ratings
No clear lead1,008 Elo
Rank 37, 95% confidence interval: ±7, 6,580 ratings
Artificial AnalysisRetrieved 2026-09-22
LMArena Text to Image: 3D modeling
Higher score1,172.339
Rank 24, 95% confidence interval: ±7.04, 15,061 ratings
1,147.767
Rank 32, 95% confidence interval: ±6.08, 18,321 ratings
LMArenaRetrieved 2026-09-19
LMArena Text to Image: Art
1,155.555
Rank 31, 95% confidence interval: ±6.39, 21,767 ratings
No clear lead1,162.175
Rank 29, 95% confidence interval: ±5.57, 26,959 ratings
LMArenaRetrieved 2026-09-19
LMArena Text to Image: Cartoon
No clear lead1,162.266
Rank 29, 95% confidence interval: ±5.16, 55,805 ratings
1,160.398
Rank 30, 95% confidence interval: ±4.43, 70,569 ratings
LMArenaRetrieved 2026-09-19
LMArena Text to Image: Commercial design
Higher score1,173.172
Rank 24, 95% confidence interval: ±4.96, 55,214 ratings
1,155.351
Rank 29, 95% confidence interval: ±4.21, 68,394 ratings
LMArenaRetrieved 2026-09-19
LMArena Text to Image: Overall
No clear lead1,156.503
Rank 27, 95% confidence interval: ±3.43, 149,288 ratings
1,153.926
Rank 28, 95% confidence interval: ±2.96, 188,083 ratings
LMArenaRetrieved 2026-09-19
LMArena Text to Image: Photorealism
1,146.875
Rank 36, 95% confidence interval: ±4.88, 63,739 ratings
No clear lead1,152.003
Rank 33, 95% confidence interval: ±4.18, 79,531 ratings
LMArenaRetrieved 2026-09-19
LMArena Text to Image: Portraits
1,144.629
Rank 37, 95% confidence interval: ±5.83, 33,656 ratings
No clear lead1,144.638
Rank 36, 95% confidence interval: ±5.09, 41,905 ratings
LMArenaRetrieved 2026-09-19
LMArena Text to Image: Text rendering
Higher score1,171.992
Rank 25, 95% confidence interval: ±5.15, 49,929 ratings
1,155.146
Rank 30, 95% confidence interval: ±4.39, 63,433 ratings
LMArenaRetrieved 2026-09-19
LMArena Image Editing: Multi-image editing
1,234.148
Rank 24, 95% confidence interval: ±4.35, 125,558 ratings
No clear lead1,240.557
Rank 22, 95% confidence interval: ±3.48, 205,735 ratings
LMArenaRetrieved 2026-09-19
LMArena Image Editing: Overall
1,225.241
Rank 38, 95% confidence interval: ±3.18, 415,750 ratings
Higher score1,244.7
Rank 32, 95% confidence interval: ±2.74, 539,449 ratings
LMArenaRetrieved 2026-09-19

Key to the marks:better valuebetter, but not conclusivetie

Visual comparison

Sample images

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

FLUX.2 Pro, Character and detail
FLUX.2 Flex, Character and detail
FLUX.2 Flex
FLUX.2 Pro
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.

FLUX.2 Flex. Provider Together, 1024x1024, n=1, seed=provider random, provider default steps, model ID black-forest-labs/FLUX.2-flex, generated Aug 14, 2026, 12:25 PM. Source
FLUX.2 Pro. Provider Together, 1024x1024, n=1, seed=provider random, provider default steps, model ID black-forest-labs/FLUX.2-pro, generated Aug 14, 2026, 12:30 PM. Source

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

Prompt SHA 256: 985a75b38642a9f0e5e0c0e0c67f1b7f67780d42bd2168fa24e9a7a7a94b0da6

FLUX.2 Flex, image SHA 256: 43b43d5782192d7284de2b824dd1caaaa6b25032d22fc3f8565d438b137089f3

FLUX.2 Flex, request SHA 256: fe5b22589e6505017dc44f4729b1bb60b15820ba3673354d03a69c8b82831953

FLUX.2 Pro, image SHA 256: 9eec1a6900b6031703d2e797b93c2aba6c5f45b4807b560a0bf1e37eac9e20f2

FLUX.2 Pro, request SHA 256: 8c40a10f47e1407d26ab10f5c9d815e533bce798cf0adf5a9c1e6ddfc3f3584e

Infographic

Numbers, labels, and visual organization

FLUX.2 Pro, Infographic
FLUX.2 Flex, Infographic
FLUX.2 Flex
FLUX.2 Pro
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.

FLUX.2 Flex. Provider Together, 1024x1024, n=1, seed=provider random, provider default steps, model ID black-forest-labs/FLUX.2-flex, generated Aug 14, 2026, 12:25 PM. Source
FLUX.2 Pro. Provider Together, 1024x1024, n=1, seed=provider random, provider default steps, model ID black-forest-labs/FLUX.2-pro, generated Aug 14, 2026, 12:31 PM. Source

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

Prompt SHA 256: ed65cb4e6a51e2336f8b149ad4cbb16e020f07d527ad94362e719d2dcf91d94f

FLUX.2 Flex, image SHA 256: 105f60cdeb71a27021ffff1ad3c0ad919df4e5c74ad83b4628fbd64a8d795a09

FLUX.2 Flex, request SHA 256: 11d4ec056332340dc822c82021ef10c6a6aa92de6e44dc931a90b7cbb6f14146

FLUX.2 Pro, image SHA 256: ea47f772cdfa26bf21528ae7e09d245eb7a3be7d3185af15cedd7d21acdfbb09

FLUX.2 Pro, request SHA 256: 9ef85d9cf32f0f9b974eeb0b389c1fbf1403f4e266af0ce98e0ca83da0fe23c1

Product photography

Materials, reflections, and fine details

FLUX.2 Pro, Product photography
FLUX.2 Flex, Product photography
FLUX.2 Flex
FLUX.2 Pro
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.

FLUX.2 Flex. Provider Together, 1024x1024, n=1, seed=provider random, provider default steps, model ID black-forest-labs/FLUX.2-flex, generated Aug 14, 2026, 12:25 PM. Source
FLUX.2 Pro. Provider Together, 1024x1024, n=1, seed=provider random, provider default steps, model ID black-forest-labs/FLUX.2-pro, generated Aug 14, 2026, 12:30 PM. Source

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

Prompt SHA 256: c67fd71e91304458a2feef5c91efa8677260fab0c0099a29a2c52cb579f5b2f3

FLUX.2 Flex, image SHA 256: 9fef39b1500635ddbf78bcb8d3d9a68463ce952aa1fab89d12f6efe023907de7

FLUX.2 Flex, request SHA 256: 1c864c5e5d7f1e7008f15466fd0786f801ae94b17939b4f10de9a61c27766a59

FLUX.2 Pro, image SHA 256: 4d9b922f59b329c5ac3532222c8e340e7fdcb1920ce6f03ad9299f25a6beec43

FLUX.2 Pro, request SHA 256: 96c65fc91b32da0a02970457fbf90c6928e1f7a5b45177fa3ef08f8bc32c9b82

Typography and layout

Legible text, hierarchy, and composition

FLUX.2 Pro, Typography and layout
FLUX.2 Flex, Typography and layout
FLUX.2 Flex
FLUX.2 Pro
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.

FLUX.2 Flex. Provider Together, 1024x1024, n=1, seed=provider random, provider default steps, model ID black-forest-labs/FLUX.2-flex, generated Aug 14, 2026, 2:01 PM. Source
FLUX.2 Pro. Provider Together, 1024x1024, n=1, seed=provider random, provider default steps, model ID black-forest-labs/FLUX.2-pro, generated Aug 14, 2026, 2:02 PM. Source

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

Prompt SHA 256: 2e012c3d14ee5dd02203a94f394ca80a5038cdebd6032b25a8b8a221f2255419

FLUX.2 Flex, image SHA 256: 324f87bf898593446a400abb43bd00eee015fa0a1dc160db0f864402fc0b38af

FLUX.2 Flex, request SHA 256: a0aa716f2a302bdfa59820d2e2c27cc56f730e8e2e4d5b64223d29a6979e1475

FLUX.2 Pro, image SHA 256: 5a5d8ccd657d7522bc39fdec4b0aecf198b42c282a5aefde9461239dfe5c0396

FLUX.2 Pro, request SHA 256: 3e170f568fe4b6040423f0df065d9227f586d5da3d911a4251bcc368dfe333c0

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.

More matchups

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