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GPT Image 2vs.HiDream-O1-Image-1.5

Which one is better?

In our own test both are on par. HiDream-O1-Image-1.5 has no arena rating yet. GPT Image 2 costs 2.6 times as much per image.

Test images

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

GPT Image 2: Product photography, first image from the fixed test run
GPT Image 289 out of 100
HiDream-O1-Image-1.5: Product photography, first image from the fixed test run
HiDream-O1-Image-1.551 out of 100

Result for “Product photography”:GPT Image 2 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

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

GPT Image 2: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:13 PM. Source

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

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

GPT Image 2 image SHA 256: 82f6e2369ab4fb6efb0ef48feeff0d14f1d6087c64c35113a983456f0f0879ac

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

Infographic

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

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

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

GPT Image 2 image SHA 256: 6c15466e258e2b14a8e862959cb6a67b4f7a23896ea5d42c5a5618d848847711

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

Product photography

GPT Image 2: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:13 PM. Source

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

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

GPT Image 2 image SHA 256: 471c71b30618afb1a8a67ab8363308d67f99c65ef6740ca72417806d06d3c346

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

Typography and layout

GPT Image 2: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 1:59 PM. Source

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

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

GPT Image 2 image SHA 256: 434cf9939b9be2a2c2711e13d027c9438c47038bb32229ceeaf405d2e89d2afc

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

The numbers at a glance

Arena ratingfrom votes by users · higher is better
1,382

GPT Image 2

Rank 3 of 21

n/a

HiDream-O1-Image-1.5

not in the arena

GraduallyBenchour own rating, 0 to 100 · higher is better
73

GPT Image 2

Rank 15 of 108

65

HiDream-O1-Image-1.5

Rank 38 of 108

Price per imagedollars through the API · lower is better
$0.21

GPT Image 2

expensive

$0.08

HiDream-O1-Image-1.5

fairly expensive

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.

GPT Image 2

Subscription
No OpenAI subscription includes this model. Through other providers from ≈ €6.36 a month (ElevenLabs Starter, with limited credits). 61 plans in Germany.
Via API
$0.21 per image, 100 images $21.10.

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.

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.

KennzahlGPT Image 2HiDream-O1-Image-1.5
Ratings
Arena ratingfrom votes by users, higher is better1,382n/a
Arena rankRank 3 of 21n/a
Arena votesmore votes, a safer rating106,737n/a
GraduallyBenchour own rating, 0 to 1007365
GraduallyBench by task
Typography and layoutLegible text, hierarchy, and composition7576
Product photographyMaterials, reflections, and fine details8951
Character and detailAnatomy, clothing, and spatial consistency6058
InfographicNumbers, labels, and visual organization6676
API price
Per imagelower is better$0.21$0.08
100 images$21.10$8
Profile
ReleasedApril 2026June 2026
Weightsopen means: runs locallyproprietaryproprietary
AccessAPI, Web appAPI, Web app
Parametersnot publishednot published
Largest output4K2,048 × 2,048 pixels
Plans in Germanynaming exactly this model61n/a

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

Sources: GPT Image 2 model source (verified Aug 15, 2026) · HiDream-O1-Image-1.5 model source (verified Sep 22, 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 betterGPT Image 2HiDream-O1-Image-1.5
Text to Image ArenaGPT Image 2: 1,188HiDream-O1-Image-1.5: 1,018GPT Image 2 ahead

Artificial Analysis from Nov 6, 2026

All individual values with sources
RatingGPT Image 2HiDream-O1-Image-1.5Source
Text to Image Arena1,1881,018Artificial AnalysisRetrieved Nov 6, 2026

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