GPT Image 2.5 Sunburstvs.FLUX.2 Pro

Which one is better?

In our own test both are on par. In the arena, GPT Image 2.5 Sunburst leads. GPT Image 2.5 Sunburst costs 7.0 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: Infographic, first image from the fixed test run — GPT Image 2.5 Sunburst97 out of 100

FLUX.2 Pro: Infographic, first image from the fixed test run — FLUX.2 Pro45 out of 100

Result for “Infographic”:GPT Image 2.5 Sunburst ahead

Prompt given to both modelsCreate 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.

What the rating looks at: Numbers, labels, and visual organization.

“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

FLUX.2 Pro: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:30 PM. Source

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

GPT Image 2.5 Sunburst image SHA 256: 2bcd5e2358dbf9e2f11336ebf6c4a4a15e0a9a10261dd74378d40985ac68ec6d

FLUX.2 Pro image SHA 256: 9eec1a6900b6031703d2e797b93c2aba6c5f45b4807b560a0bf1e37eac9e20f2

Infographic

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

FLUX.2 Pro: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:31 PM. Source

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

GPT Image 2.5 Sunburst image SHA 256: 7dab94e5588be73aefe08f23f9d56ced4e2ddb2b29f754db41b057025cf34847

FLUX.2 Pro image SHA 256: ea47f772cdfa26bf21528ae7e09d245eb7a3be7d3185af15cedd7d21acdfbb09

Product photography

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

FLUX.2 Pro: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:30 PM. Source

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

GPT Image 2.5 Sunburst image SHA 256: c648276704e06f7925f2325e8ffff0d9d0a9bd6c5bb4866785abac92ce97ff9a

FLUX.2 Pro image SHA 256: 4d9b922f59b329c5ac3532222c8e340e7fdcb1920ce6f03ad9299f25a6beec43

Typography and layout

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

FLUX.2 Pro: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 2:02 PM. Source

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

GPT Image 2.5 Sunburst image SHA 256: fd6a3767ba8253869cb94d5346f025541dac924c2190df2c37b366b182986cf8

FLUX.2 Pro image SHA 256: 5a5d8ccd657d7522bc39fdec4b0aecf198b42c282a5aefde9461239dfe5c0396

The numbers at a glance

Arena ratingfrom votes by users · higher is better

1,427

GPT Image 2.5 Sunburst

Rank 1 of 21

1,153

FLUX.2 Pro

Rank 17 of 21

GraduallyBenchour own rating, 0 to 100 · higher is better

GPT Image 2.5 Sunburst

Rank 8 of 108

FLUX.2 Pro

Rank 41 of 108

Price per imagedollars through the API · lower is better

$0.21

GPT Image 2.5 Sunburst

expensive

$0.03

FLUX.2 Pro

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.

FLUX.2 Pro

Subscription: No Black Forest Labs subscription includes this model. Through other providers from ≈ €6.39 a month (ElevenLabs Starter, with limited credits). 43 plans in Germany.
Via API: $0.03 per image, 100 images $3.

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	FLUX.2 Pro
Ratings
Arena ratingfrom votes by users, higher is better	1,427	1,153
Arena rank	Rank 1 of 21	Rank 17 of 21
Arena votesmore votes, a safer rating	40,323	223,179
GraduallyBenchour own rating, 0 to 100	75	65
GraduallyBench by task
Typography and layoutLegible text, hierarchy, and composition	54	69
Product photographyMaterials, reflections, and fine details	87	58
Character and detailAnatomy, clothing, and spatial consistency	64	87
InfographicNumbers, labels, and visual organization	97	45
API price
Per imagelower is better	$0.21	$0.03
100 images	$21.07	$3
Profile
Released	Sep 8, 2026	November 2025
Weightsopen means: runs locally	proprietary	proprietary
Access	API	API, Web app
Parameters	not published	not published
Largest output	3,840 × 2,160 pixels	4 Megapixel
Plans in Germanynaming exactly this model	62	43

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) · FLUX.2 Pro 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 betterGPT Image 2.5 SunburstFLUX.2 Pro

Text to Image Arena1,2231,003ahead

Image Editing Arena1,1991,013ahead

Text to Image: 3D modeling1,4161,145ahead

Text to Image: Agentic image generation1,3971,137ahead

Text to Image: Art1,4091,159ahead

Text to Image: Cartoon1,4561,159ahead

Text to Image: Commercial design1,4191,154ahead

Text to Image: Overall1,4271,153ahead

Text to Image: Photorealism1,4331,151ahead

Text to Image: Portraits1,4611,144ahead

Text to Image: Text rendering1,4661,155ahead

Image Editing: Agentic image generation1,5291,216ahead

Image Editing: Multi-image editing1,5211,240ahead

Image Editing: Agentic multi-image editing1,5411,189ahead

Image Editing: Overall1,5171,247ahead

Artificial Analysis from Nov 3, 2026 · LMArena from Oct 28, 2026

All individual values with sources

Rating	GPT Image 2.5 Sunburst	FLUX.2 Pro	Source
Text to Image Arena	1,223	1,003	Artificial AnalysisRetrieved Nov 3, 2026
Image Editing Arena	1,199	1,013	Artificial AnalysisRetrieved Nov 3, 2026
Text to Image: 3D modeling	1,416	1,145	LMArenaRetrieved Oct 28, 2026
Text to Image: Agentic image generation	1,397	1,137	LMArenaRetrieved Oct 28, 2026
Text to Image: Art	1,409	1,159	LMArenaRetrieved Oct 28, 2026
Text to Image: Cartoon	1,456	1,159	LMArenaRetrieved Oct 28, 2026
Text to Image: Commercial design	1,419	1,154	LMArenaRetrieved Oct 28, 2026
Text to Image: Overall	1,427	1,153	LMArenaRetrieved Oct 28, 2026
Text to Image: Photorealism	1,433	1,151	LMArenaRetrieved Oct 28, 2026
Text to Image: Portraits	1,461	1,144	LMArenaRetrieved Oct 28, 2026
Text to Image: Text rendering	1,466	1,155	LMArenaRetrieved Oct 28, 2026
Image Editing: Agentic image generation	1,529	1,216	LMArenaRetrieved Oct 28, 2026
Image Editing: Multi-image editing	1,521	1,240	LMArenaRetrieved Oct 28, 2026
Image Editing: Agentic multi-image editing	1,541	1,189	LMArenaRetrieved Oct 28, 2026
Image Editing: Overall	1,517	1,247	LMArenaRetrieved Oct 28, 2026

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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
FLUX.2 Pro has no successor yet

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