GPT Image 2.5 Sunburstvs.Ideogram 4.0

Which one is better?

In our own test both are on par. Ideogram 4.0 has no arena rating yet. GPT Image 2.5 Sunburst costs 3.5 times as much per image.

Test images

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

GPT Image 2.5 Sunburst: Product photography, first image from the fixed test run — GPT Image 2.5 Sunburst87 out of 100

Ideogram 4.0: Product photography, first image from the fixed test run — Ideogram 4.022 out of 100

Result for “Product photography”:GPT Image 2.5 Sunburst 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 2.5 Sunburst: openai, 1024x1024, quality high, n=1, generated Sep 28, 2026, 8:51 PM. Source

Ideogram 4.0: together, requested 2048x2048, stored 1024x1024 (Lanczos3 downscale), n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:28 PM. Source

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

GPT Image 2.5 Sunburst image SHA 256: 2bcd5e2358dbf9e2f11336ebf6c4a4a15e0a9a10261dd74378d40985ac68ec6d

Ideogram 4.0 image SHA 256: d63d24515e4c3a8b7feafecaf995a511433307ae5faae1a1c26b2f0289578af9

Infographic

GPT Image 2.5 Sunburst: openai, 1024x1024, quality high, n=1, generated Sep 28, 2026, 8:52 PM. Source

Ideogram 4.0: together, requested 2048x2048, stored 1024x1024 (Lanczos3 downscale), n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:28 PM. Source

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

GPT Image 2.5 Sunburst image SHA 256: 7dab94e5588be73aefe08f23f9d56ced4e2ddb2b29f754db41b057025cf34847

Ideogram 4.0 image SHA 256: f57e6f5b7ae9038953087720387aa4a901832a1794dbb5e3f337f9d3ef213d62

Product photography

GPT Image 2.5 Sunburst: openai, 1024x1024, quality high, n=1, generated Sep 28, 2026, 8:51 PM. Source

Ideogram 4.0: together, requested 2048x2048, stored 1024x1024 (Lanczos3 downscale), n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:27 PM. Source

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

GPT Image 2.5 Sunburst image SHA 256: c648276704e06f7925f2325e8ffff0d9d0a9bd6c5bb4866785abac92ce97ff9a

Ideogram 4.0 image SHA 256: 59b59cf5294653460f06085eedcfeb676b8c50f88f58f038b32659841f0500dd

Typography and layout

GPT Image 2.5 Sunburst: openai, 1024x1024, quality high, n=1, generated Sep 28, 2026, 8:50 PM. Source

Ideogram 4.0: together, requested 2048x2048, stored 1024x1024 (Lanczos3 downscale), 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

GPT Image 2.5 Sunburst image SHA 256: fd6a3767ba8253869cb94d5346f025541dac924c2190df2c37b366b182986cf8

Ideogram 4.0 image SHA 256: 088eabf7b8c37bd377011dd2649a2deeee49ffb903e4798a6930bb94144f1eb4

The numbers at a glance

Arena ratingfrom votes by users · higher is better

1,427

GPT Image 2.5 Sunburst

Rank 1 of 21

n/a

Ideogram 4.0

not in the arena

GraduallyBenchour own rating, 0 to 100 · higher is better

GPT Image 2.5 Sunburst

Rank 8 of 108

Ideogram 4.0

Rank 57 of 108

Price per imagedollars through the API · lower is better

$0.21

GPT Image 2.5 Sunburst

expensive

$0.06

Ideogram 4.0

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.

GPT Image 2.5 Sunburst

Subscription: No OpenAI subscription includes this model. Through other providers from ≈ €6.39 a month (ElevenLabs Starter, with limited credits). 62 plans in Germany.
Via API: $0.21 per image, 100 images $21.07.

Ideogram 4.0

Subscription: Free to use at Ideogram (Ideogram Free, with limited credits), more from ≈ €21.30 a month (Ideogram Plus, with limited credits). Through other providers from ≈ €9.59 a month (Krea Basic, with limited credits). 16 plans in Germany.
Via API: $0.06 per image, 100 images $6.
License: Open weights.

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

Arena rating (LMArena) from Oct 28, 2026 · GraduallyBench from Nov 3, 2026 · API prices from Nov 3, 2026 · Subscription database from Sep 29, 2026 (35 days old)

All data side by side

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

Kennzahl	GPT Image 2.5 Sunburst	Ideogram 4.0
Ratings
Arena ratingfrom votes by users, higher is better	1,427	n/a
Arena rank	Rank 1 of 21	n/a
Arena votesmore votes, a safer rating	40,323	n/a
GraduallyBenchour own rating, 0 to 100	75	55
GraduallyBench by task
Typography and layoutLegible text, hierarchy, and composition	54	67
Product photographyMaterials, reflections, and fine details	87	22
Character and detailAnatomy, clothing, and spatial consistency	64	59
InfographicNumbers, labels, and visual organization	97	73
API price
Per imagelower is better	$0.21	$0.06
100 images	$21.07	$6
Profile
Released	Sep 8, 2026	June 2026
Weightsopen means: runs locally	proprietary	open
Access	API	API, Web app, local
Parameters	not published	9.3 billion
Largest output	3,840 × 2,160 pixels	2K
Plans in Germanynaming exactly this model	62	16

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

Sources: GPT Image 2.5 Sunburst model source (verified Sep 24, 2026) · Ideogram 4.0 model source (verified Aug 15, 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 2.5 SunburstIdeogram 4.0

Text to Image Arena1,2231,002ahead

Artificial Analysis from Nov 3, 2026

All individual values with sources

Rating	GPT Image 2.5 Sunburst	Ideogram 4.0	Source
Text to Image Arena	1,223	1,002	Artificial AnalysisRetrieved Nov 3, 2026

More comparisons with GPT Image 2.5 Sunburst and Ideogram 4.0

Compare GPT Image 2.5 Sunburst and Ideogram 4.0 with the models people compare them with most often.

Compare another matchup

First image modelSecond image model

Predecessor and successor

PredecessorGPT Image 2.5 Sunburst vs. GPT Image 2Predecessor of GPT Image 2.5 Sunburst
GPT Image 2.5 Sunburst has no successor yet
No predecessor recorded for Ideogram 4.0
Ideogram 4.0 has no successor yet

The most popular comparisons

Show all 11 comparisons