GPT Image 1.5vs.Ideogram 4.5

Which one is better?

In our own test both are on par. Ideogram 4.5 has no arena rating yet. GPT Image 1.5 costs 1.3 times as much per image.

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

GPT Image 1.5: Typography and layout, first image from the fixed test run — GPT Image 1.558 out of 100

Ideogram 4.5: Typography and layout, first image from the fixed test run — Ideogram 4.516 out of 100

Result for “Typography and layout”:GPT Image 1.5 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

Both models receive the same archived prompt in 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. The images are a practical visual test, not a reconstruction of the arena configuration.

Character and detail

GPT Image 1.5: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:17 PM. Source

Ideogram 4.5: fal, requested 1024x1024, n=1, seed=676327336, prompt expansion disabled, quality low, estimated cost $0.030000, generated Nov 1, 2026, 8:44 PM. Source

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

GPT Image 1.5 image SHA 256: 0dff52ccd39400ac66ac8870c9ea937512ff1474688e70118688f420c38c2296

Ideogram 4.5 image SHA 256: 765cb852ecb10a396bad4bd18c2dc9fcc77221ffff3f0b94ef9eccf4d190b418

Infographic

GPT Image 1.5: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:17 PM. Source

Ideogram 4.5: fal, requested 1024x1024, n=1, seed=1482950298, prompt expansion disabled, quality low, estimated cost $0.030000, generated Nov 1, 2026, 8:44 PM. Source

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

GPT Image 1.5 image SHA 256: 1c9ff59c32621c8b48b002dacb0ae66487262280c7c0a5b3d6456c81b248ebe9

Ideogram 4.5 image SHA 256: c97b4321e68bf1617a4dc96b5e1f9372344b09b9ff987f07d0e9813e6210c656

Product photography

GPT Image 1.5: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:16 PM. Source

Ideogram 4.5: fal, requested 1024x1024, n=1, seed=1376877115, prompt expansion disabled, quality low, estimated cost $0.030000, generated Nov 1, 2026, 8:44 PM. Source

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

GPT Image 1.5 image SHA 256: 67cfa2f324447027ceb5f82e9446d40a1395b46ce425890a74606b4d97731cf6

Ideogram 4.5 image SHA 256: b9427281a64b3103f52f439b8797bd11763f813a8ef142bf79d96e936b349ae1

Typography and layout

GPT Image 1.5: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 1:59 PM. Source

Ideogram 4.5: fal, requested 1024x1024, n=1, seed=988679089, prompt expansion disabled, quality low, estimated cost $0.030000, generated Nov 1, 2026, 8:44 PM. Source

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

GPT Image 1.5 image SHA 256: 6a4cec86850fd371b65274198e2bf630b3cf36a096f9fb953d4bfe17c3222ebe

Ideogram 4.5 image SHA 256: ebe1fe3dccf258807db9a9063c1034185c1b3e91f0d8c9bd86c53525d374dd9c

The numbers at a glance

Arena ratingfrom votes by users · higher is better

1,236

GPT Image 1.5

Rank 13 of 22

n/a

Ideogram 4.5

not in the arena

GraduallyBenchour own rating, 0 to 100 · higher is better

GPT Image 1.5

Rank 43 of 74

Ideogram 4.5

Rank 38 of 74

Price per imagedollars through the API · lower is better

$0.13

GPT Image 1.5

expensive

$0.10

Ideogram 4.5

expensive

Ranks among the 22 image models with an arena rating and the 74 with a GraduallyBench run; prices compared with 28 models with an API price.

GPT Image 1.5

Subscription: No OpenAI subscription includes this model. Through other providers from ≈ €6.39 a month (ElevenLabs Starter, with limited credits). 42 plans in Germany.
Via API: $0.13 per image, 100 images $13.30.

Ideogram 4.5

Subscription: No Ideogram subscription includes this model. Through other providers from ≈ €9.59 a month (Krea Basic, with limited credits). 33 plans in Germany.
Via API: $0.10 per image, 100 images $10.
Weights: unknown.

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 1, 2026 · API prices from Oct 28, 2026 · Subscription database from Sep 29, 2026 (34 days old)

All data side by side

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

Kennzahl	GPT Image 1.5	Ideogram 4.5
Ratings
Arena ratingfrom votes by users, higher is better	1,236	n/a
Arena rank	Rank 13 of 22	n/a
Arena votesmore votes, a safer rating	174,012	n/a
GraduallyBenchour own rating, 0 to 100	54	56
GraduallyBench by task
Typography and layoutLegible text, hierarchy, and composition	58	16
Product photographyMaterials, reflections, and fine details	38	59
Character and detailAnatomy, clothing, and spatial consistency	64	68
InfographicNumbers, labels, and visual organization	56	82
API price
Per imagelower is better	$0.13	$0.10
100 images	$13.30	$10
Profile
Released	December 2025	n/a
Weightsopen means: runs locally	proprietary	unknown
Lifecycle	Marked as deprecated by OpenAI; removed from the API on December 1, 2026	no notice
Access	API, Web app	API
Parameters	not published	not published
Largest output	1,536 × 1,024 pixels	not consistently published
Plans in Germanynaming exactly this model	42	33

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

Sources: GPT Image 1.5 model source, status source (verified Aug 15, 2026) · Ideogram 4.5 model source (verified Nov 1, 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 1.5Ideogram 4.5

Text to Image Arena1,1231,015ahead

Image Editing Arena1,1191,070ahead

Image Editing: Agentic image generation1,3581,296ahead

Image Editing: Multi-image editing1,3421,337level

Image Editing: Overall1,3681,347ahead

Artificial Analysis from Oct 28, 2026 · LMArena from Oct 28, 2026

All individual values with sources

Rating	GPT Image 1.5	Ideogram 4.5	Source
Text to Image Arena	1,123	1,015	Artificial AnalysisRetrieved Oct 28, 2026
Image Editing Arena	1,119	1,070	Artificial AnalysisRetrieved Oct 28, 2026
Image Editing: Agentic image generation	1,358	1,296	LMArenaRetrieved Oct 28, 2026
Image Editing: Multi-image editing	1,342	1,337	LMArenaRetrieved Oct 28, 2026
Image Editing: Overall	1,368	1,347	LMArenaRetrieved Oct 28, 2026

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View the complete image model comparison

Same prompt, two images

The numbers at a glance

GPT Image 1.5

Ideogram 4.5

All data side by side

Arena ratings by category

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