HiDream-O1-Image-1.5vs.FLUX.2 Flex

Which one is better?

In our own test both are on par. HiDream-O1-Image-1.5 has no arena rating yet. HiDream-O1-Image-1.5 costs 1.3 times as much per image.

Test images

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

HiDream-O1-Image-1.5: Typography and layout, first image from the fixed test run — HiDream-O1-Image-1.576 out of 100

FLUX.2 Flex: Typography and layout, first image from the fixed test run — FLUX.2 Flex98 out of 100

Result for “Typography and layout”:FLUX.2 Flex ahead

Prompt given to both modelsCreate 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.

What the rating looks at: Legible text, hierarchy, and composition.

“Ahead”: better in all three rating rounds. “Slightly ahead”: a higher value, but not in every round.

Test protocol of the images

Each test attempt uses the same archived prompt and one request. The first output of that attempt counts. Repeats after technical test failures are disclosed for the affected images. 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

HiDream-O1-Image-1.5: manual, one request, first output, HiDream O1 Image 1.5, 1:1, 2K, n=1, no reference image, no negative prompt, Vivago web, 2 free credits, source 2048x2048, stored 1024x1024 (Lanczos3 downscale), generated Aug 16, 2026, 1:07 PM. Source

FLUX.2 Flex: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:25 PM. Source

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

HiDream-O1-Image-1.5 image SHA 256: 99db95d2f6f00dc7f8872b5562b7577a49065a120d15fc54f687ba624fe4cf6e

FLUX.2 Flex image SHA 256: 43b43d5782192d7284de2b824dd1caaaa6b25032d22fc3f8565d438b137089f3

Infographic

FLUX.2 Flex: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:25 PM. Source

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

HiDream-O1-Image-1.5 image SHA 256: 073d00d82d82a05c20f9117a18e71e21fe0300fd9f4985608be09726b1ee70a8

FLUX.2 Flex image SHA 256: 105f60cdeb71a27021ffff1ad3c0ad919df4e5c74ad83b4628fbd64a8d795a09

Product photography

FLUX.2 Flex: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:25 PM. Source

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

HiDream-O1-Image-1.5 image SHA 256: 98de28b81a3551441936ce2ebcc0b418e69e9d5cf6ce8b1dc281bc90b05731dc

FLUX.2 Flex image SHA 256: 9fef39b1500635ddbf78bcb8d3d9a68463ce952aa1fab89d12f6efe023907de7

Typography and layout

FLUX.2 Flex: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 2:01 PM. Source

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

HiDream-O1-Image-1.5 image SHA 256: db5acbc9b443ea381bf6294997720fa246cf8a199f91d451aa1d7242fc4a348a

FLUX.2 Flex image SHA 256: 324f87bf898593446a400abb43bd00eee015fa0a1dc160db0f864402fc0b38af

The numbers at a glance

Arena ratingfrom votes by users · higher is better

n/a

HiDream-O1-Image-1.5

not in the arena

1,156

FLUX.2 Flex

Rank 16 of 21

GraduallyBenchour own rating, 0 to 100 · higher is better

HiDream-O1-Image-1.5

Rank 38 of 108

FLUX.2 Flex

Rank 11 of 108

Price per imagedollars through the API · lower is better

$0.08

HiDream-O1-Image-1.5

fairly expensive

$0.06

FLUX.2 Flex

fairly cheap

Ranks among the 21 image models with an arena rating and the 108 with a GraduallyBench run; prices compared with 28 models with an API price.

HiDream-O1-Image-1.5

Subscription: n/a No plan in Germany names exactly this model.
Via API: $0.08 per image, 100 images $8.

FLUX.2 Flex

Subscription: No Black Forest Labs subscription includes this model. Through other providers from €6.83 a month (Poe Basic, with limited points). 26 plans in Germany.
Via API: $0.06 per image, 100 images $6.

Subscriptions only count plans that name exactly this model. Subscription prices include VAT, API prices are in dollars.

Arena rating (LMArena) from Nov 6, 2026 · GraduallyBench from Nov 3, 2026 · API prices from Nov 6, 2026 · Subscription database from Sep 29, 2026 (38 days old)

All data side by side

The better value is bold. For ratings only when the gap is clear.

Kennzahl	HiDream-O1-Image-1.5	FLUX.2 Flex
Ratings
Arena ratingfrom votes by users, higher is better	n/a	1,156
Arena rank	n/a	Rank 16 of 21
Arena votesmore votes, a safer rating	n/a	156,849
GraduallyBenchour own rating, 0 to 100	65	73
GraduallyBench by task
Typography and layoutLegible text, hierarchy, and composition	76	98
Product photographyMaterials, reflections, and fine details	51	63
Character and detailAnatomy, clothing, and spatial consistency	58	75
InfographicNumbers, labels, and visual organization	76	57
API price
Per imagelower is better	$0.08	$0.06
100 images	$8	$6
Profile
Released	June 2026	November 2025
Weightsopen means: runs locally	proprietary	proprietary
Access	API, Web app	API, Web app
Parameters	not published	not published
Largest output	2,048 × 2,048 pixels	4 Megapixel
Plans in Germanynaming exactly this model	n/a	26

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

Sources: HiDream-O1-Image-1.5 model source (verified Sep 22, 2026) · FLUX.2 Flex model source (verified Sep 24, 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 betterHiDream-O1-Image-1.5FLUX.2 Flex

Text to Image Arena1,0181,028level

Artificial Analysis from Nov 6, 2026

All individual values with sources

Rating	HiDream-O1-Image-1.5	FLUX.2 Flex	Source
Text to Image Arena	1,018	1,028	Artificial AnalysisRetrieved Nov 6, 2026

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Test images

The numbers at a glance

HiDream-O1-Image-1.5

FLUX.2 Flex

All data side by side

Arena ratings by category

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