GPT Image 2.5 Flarevs.Nano Banana (Gemini 2.5 Flash Image)

Which one is better?

In our own test both are on par. Nano Banana (Gemini 2.5 Flash Image) has no arena rating yet. Nano Banana (Gemini 2.5 Flash Image) has no API price.

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

GPT Image 2.5 Flare: Infographic, first image from the fixed test run — GPT Image 2.5 Flare66 out of 100

Nano Banana (Gemini 2.5 Flash Image): Infographic, first image from the fixed test run — Nano Banana (Gemini 2.5 Flash Image)27 out of 100

Result for “Infographic”:GPT Image 2.5 Flare 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

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 2.5 Flare: openai, 1024x1024, quality high, n=1, generated Sep 28, 2026, 8:53 PM. Source

Nano Banana (Gemini 2.5 Flash Image): fal, aspect ratio 1:1, n=1, seed=provider random, Fal schema does not expose an output-resolution parameter; require square output of at least 1024px, estimated cost $0.039800, generated Nov 1, 2026, 8:51 PM. Source

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

GPT Image 2.5 Flare image SHA 256: 85b17c41b19389cae3ea073ef582e6065a321d741978e772987d22e3ea3e3b08

Nano Banana (Gemini 2.5 Flash Image) image SHA 256: 69ecb842e42e25cf866919f9bfa573f08398a78d4fa46bca2f9c9c27996d80a7

Infographic

GPT Image 2.5 Flare: openai, 1024x1024, quality high, n=1, generated Sep 28, 2026, 8:53 PM. Source

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

GPT Image 2.5 Flare image SHA 256: bc752abfce1c0d27b73e4084c3e7d82c4c0f71e0e5af97a80f4b24326cc4686e

Nano Banana (Gemini 2.5 Flash Image) image SHA 256: d12f93429b044d541a8ea71a1fd135f89343ff6efaefafe679e9e28699ee54cf

Product photography

GPT Image 2.5 Flare: openai, 1024x1024, quality high, n=1, generated Sep 28, 2026, 8:53 PM. Source

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

GPT Image 2.5 Flare image SHA 256: 69fedb7d635d1329c461ff1ee9e5cf8384119e218e3b3bdb93b9e11f728335d8

Nano Banana (Gemini 2.5 Flash Image) image SHA 256: afdcf628727069979bcc9797a18b283079f9cafb136d8fcbc118ae1fc5523a15

Typography and layout

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

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

GPT Image 2.5 Flare image SHA 256: cc90d54a99e1bad9e0cc8e4196746fb1d56a2fdd2a9ee101dbbf270ef5e4b6a8

Nano Banana (Gemini 2.5 Flash Image) image SHA 256: eeafdc566564b9398bc45b9e8cbaa7f4ca38a1b8795e198cd056c4bc47f72121

The numbers at a glance

Arena ratingfrom votes by users · higher is better

1,401

GPT Image 2.5 Flare

Rank 2 of 22

n/a

Nano Banana (Gemini 2.5 Flash Image)

not in the arena

GraduallyBenchour own rating, 0 to 100 · higher is better

GPT Image 2.5 Flare

Rank 32 of 74

Nano Banana (Gemini 2.5 Flash Image)

Rank 44 of 74

Price per imagedollars through the API · lower is better

$0.21

GPT Image 2.5 Flare

expensive

n/a

Nano Banana (Gemini 2.5 Flash Image)

no API price

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 2.5 Flare

Subscription: No OpenAI subscription includes this model. Through other providers from ≈ €6.39 a month (ElevenLabs Starter, with limited credits). 61 plans in Germany.
Via API: $0.21 per image, 100 images $21.07.

Nano Banana (Gemini 2.5 Flash Image)

Subscription: n/a No plan in Germany names exactly this model.
Via API: No API price known. Access: API.
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 2.5 Flare	Nano Banana (Gemini 2.5 Flash Image)
Ratings
Arena ratingfrom votes by users, higher is better	1,401	n/a
Arena rank	Rank 2 of 22	n/a
Arena votesmore votes, a safer rating	39,218	n/a
GraduallyBenchour own rating, 0 to 100	59	54
GraduallyBench by task
Typography and layoutLegible text, hierarchy, and composition	48	58
Product photographyMaterials, reflections, and fine details	38	77
Character and detailAnatomy, clothing, and spatial consistency	82	54
InfographicNumbers, labels, and visual organization	66	27
API price
Per imagelower is better	$0.21	n/a
100 images	$21.07	n/a
Profile
Released	Sep 8, 2026	Oct 2, 2025
Weightsopen means: runs locally	proprietary	unknown
Lifecycle	no notice	Active stable API ID; earliest announced shutdown date is March 15, 2027
Access	API	API
Parameters	not published	not published
Largest output	not consistently published	not consistently published
Plans in Germanynaming exactly this model	61	n/a

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

Sources: GPT Image 2.5 Flare model source (verified Sep 22, 2026) · Nano Banana (Gemini 2.5 Flash Image) model source, status source (verified Nov 1, 2026)

Arena ratings by category

From blind votes on LMArena. “Ahead” means the lead is clear.

No shared arena score in the stored snapshot

The stored benchmark database contains no measurement for GPT Image 2.5 Flare and Nano Banana (Gemini 2.5 Flash Image) from the same arena and category. Older model versions are not used as substitutes.

Compare another matchup

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More matchups

Compare GPT Image 2.5 Flare and Nano Banana (Gemini 2.5 Flash Image) with other important image models.

View the complete image model comparison

Same prompt, two images

The numbers at a glance

GPT Image 2.5 Flare

Nano Banana (Gemini 2.5 Flash Image)

All data side by side

Arena ratings by category

No shared arena score in the stored snapshot

Compare another matchup

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