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GPT Image 1.5vs.Nano Banana Pro

Which one is better?

In our own test both are on par. In the arena, Nano Banana Pro leads. Both are in the lower half there, though. Both cost about the same per image.

Test images

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

GPT Image 1.5: Character and detail, first image from the fixed test run
GPT Image 1.589 out of 100
Nano Banana Pro: Character and detail, first image from the fixed test run
Nano Banana Pro37 out of 100

Result for “Character and detail”:GPT Image 1.5 ahead

Prompt given to both modelsCreate a square cinematic full-body portrait of a fictional bicycle courier waiting under a transparent umbrella at a rainy tram stop in Hamburg at blue hour. She wears a mustard raincoat, navy trousers, red sneakers, a silver helmet, and carries a teal messenger bag. Keep both hands visible, render the bicycle correctly, use realistic wet-street reflections, and include no readable brand names.

What the rating looks at: Anatomy, clothing, and spatial consistency.

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

Nano Banana Pro: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:20 PM. Source

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

GPT Image 1.5 image SHA 256: 0dff52ccd39400ac66ac8870c9ea937512ff1474688e70118688f420c38c2296

Nano Banana Pro image SHA 256: eed53dcc080d2710e6e890382f6273382a12e2c5b079b8813962bff0c92b5df7

Infographic

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

Nano Banana Pro: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:20 PM. Source

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

GPT Image 1.5 image SHA 256: 1c9ff59c32621c8b48b002dacb0ae66487262280c7c0a5b3d6456c81b248ebe9

Nano Banana Pro image SHA 256: 4ff7d3965d18e197f00647c35d6aed5a86a376c92779ee9e748c598aebafa51d

Product photography

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

Nano Banana Pro: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 12:19 PM. Source

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

GPT Image 1.5 image SHA 256: 67cfa2f324447027ceb5f82e9446d40a1395b46ce425890a74606b4d97731cf6

Nano Banana Pro image SHA 256: d50770f426cac7920c9ffdaf210db2f11cdc51a8cf0b7ef52e6cd26850b1de70

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

Nano Banana Pro: together, 1024x1024, n=1, seed=provider random, provider default steps, generated Aug 14, 2026, 2:00 PM. Source

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

GPT Image 1.5 image SHA 256: 6a4cec86850fd371b65274198e2bf630b3cf36a096f9fb953d4bfe17c3222ebe

Nano Banana Pro image SHA 256: fc173de00b0df04772321167cfeabb55418d3d016081e7ebfb589c69a629b712

The numbers at a glance

Arena ratingfrom votes by users · higher is better
1,236

GPT Image 1.5

Rank 13 of 21

1,246

Nano Banana Pro

Rank 12 of 21

GraduallyBenchour own rating, 0 to 100 · higher is better
68

GPT Image 1.5

Rank 29 of 108

66

Nano Banana Pro

Rank 35 of 108

Price per imagedollars through the API · lower is better
$0.13

GPT Image 1.5

expensive

$0.13

Nano Banana Pro

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 1.5

Subscription
No OpenAI subscription includes this model. Through other providers from ≈ €6.36 a month (ElevenLabs Starter, with limited credits). 42 plans in Germany.
Via API
$0.13 per image, 100 images $13.30.

Nano Banana Pro

Subscription
At Google from €4.99 a month (Google AI Plus, with limited credits). Through other providers from ≈ €6.36 a month (ElevenLabs Starter, with limited credits). 79 plans in Germany.
Via API
$0.13 per image, 100 images $13.40.

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 1.5Nano Banana Pro
Ratings
Arena ratingfrom votes by users, higher is better1,2361,246
Arena rankRank 13 of 21Rank 12 of 21
Arena votesmore votes, a safer rating173,798191,257
GraduallyBenchour own rating, 0 to 1006866
GraduallyBench by task
Typography and layoutLegible text, hierarchy, and composition6092
Product photographyMaterials, reflections, and fine details5270
Character and detailAnatomy, clothing, and spatial consistency8937
InfographicNumbers, labels, and visual organization7265
API price
Per imagelower is better$0.13$0.13
100 images$13.30$13.40
Profile
ReleasedDecember 2025November 2025
Weightsopen means: runs locallyproprietaryproprietary
LifecycleMarked as deprecated by OpenAI; removed from the API on December 1, 2026no notice
AccessAPI, Web appAPI, Web app
Parametersnot publishednot published
Largest output1,536 × 1,024 pixels4K
Plans in Germanynaming exactly this model4279

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) · Nano Banana Pro 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 1.5Nano Banana Pro
Text to Image ArenaGPT Image 1.5: 1,124Nano Banana Pro: 1,119level
Image Editing ArenaGPT Image 1.5: 1,116Nano Banana Pro: 1,109level
Text to Image: 3D modelingGPT Image 1.5: 1,218Nano Banana Pro: 1,232Nano Banana Pro ahead
Text to Image: Agentic image generationGPT Image 1.5: 1,237Nano Banana Pro: 1,237level
Text to Image: ArtGPT Image 1.5: 1,225Nano Banana Pro: 1,224level
Text to Image: CartoonGPT Image 1.5: 1,244Nano Banana Pro: 1,244level
Text to Image: Commercial designGPT Image 1.5: 1,238Nano Banana Pro: 1,245level
Text to Image: OverallGPT Image 1.5: 1,236Nano Banana Pro: 1,246Nano Banana Pro ahead
Text to Image: PhotorealismGPT Image 1.5: 1,247Nano Banana Pro: 1,260Nano Banana Pro ahead
Text to Image: PortraitsGPT Image 1.5: 1,259Nano Banana Pro: 1,256level
Text to Image: Text renderingGPT Image 1.5: 1,251Nano Banana Pro: 1,270Nano Banana Pro ahead
Image Editing: Agentic image generationGPT Image 1.5: 1,360Nano Banana Pro: 1,405Nano Banana Pro ahead
Image Editing: Multi-image editingGPT Image 1.5: 1,342Nano Banana Pro: 1,363Nano Banana Pro ahead
Image Editing: Agentic multi-image editingGPT Image 1.5: 1,359Nano Banana Pro: 1,386Nano Banana Pro ahead
Image Editing: OverallGPT Image 1.5: 1,368Nano Banana Pro: 1,390Nano Banana Pro ahead

Artificial Analysis from Nov 6, 2026 · LMArena from Nov 6, 2026

All individual values with sources
RatingGPT Image 1.5Nano Banana ProSource
Text to Image Arena1,1241,119Artificial AnalysisRetrieved Nov 6, 2026
Image Editing Arena1,1161,109Artificial AnalysisRetrieved Nov 6, 2026
Text to Image: 3D modeling1,2181,232LMArenaRetrieved Nov 6, 2026
Text to Image: Agentic image generation1,2371,237LMArenaRetrieved Nov 6, 2026
Text to Image: Art1,2251,224LMArenaRetrieved Nov 6, 2026
Text to Image: Cartoon1,2441,244LMArenaRetrieved Nov 6, 2026
Text to Image: Commercial design1,2381,245LMArenaRetrieved Nov 6, 2026
Text to Image: Overall1,2361,246LMArenaRetrieved Nov 6, 2026
Text to Image: Photorealism1,2471,260LMArenaRetrieved Nov 6, 2026
Text to Image: Portraits1,2591,256LMArenaRetrieved Nov 6, 2026
Text to Image: Text rendering1,2511,270LMArenaRetrieved Nov 6, 2026
Image Editing: Agentic image generation1,3601,405LMArenaRetrieved Nov 6, 2026
Image Editing: Multi-image editing1,3421,363LMArenaRetrieved Nov 6, 2026
Image Editing: Agentic multi-image editing1,3591,386LMArenaRetrieved Nov 6, 2026
Image Editing: Overall1,3681,390LMArenaRetrieved Nov 6, 2026

Published specialist tests

This pair shares 60 results from published research benchmarks.

Specialist testspublished research benchmarks · higher is betterGPT Image 1.5Nano Banana Pro
GenExam Mathematics, strictGPT Image 1.5: 27%Nano Banana Pro: 56%Nano Banana Pro ahead
GenExam Physics, strictGPT Image 1.5: 46%Nano Banana Pro: 75%Nano Banana Pro ahead
GenExam Chemistry, strictGPT Image 1.5: 39%Nano Banana Pro: 60%Nano Banana Pro ahead
GenExam Biology, strictGPT Image 1.5: 56%Nano Banana Pro: 76%Nano Banana Pro ahead
GenExam Geography, strictGPT Image 1.5: 61%Nano Banana Pro: 76%Nano Banana Pro ahead
GenExam Computer science, strictGPT Image 1.5: 36%Nano Banana Pro: 66%Nano Banana Pro ahead
GenExam Engineering, strictGPT Image 1.5: 44%Nano Banana Pro: 71%Nano Banana Pro ahead
GenExam Economics, strictGPT Image 1.5: 43%Nano Banana Pro: 88%Nano Banana Pro ahead
GenExam Music, strictGPT Image 1.5: 29%Nano Banana Pro: 62%Nano Banana Pro ahead
GenExam History, strictGPT Image 1.5: 51%Nano Banana Pro: 98%Nano Banana Pro ahead
GenExam overall, strictGPT Image 1.5: 43%Nano Banana Pro: 73%Nano Banana Pro ahead
GenExam Mathematics, relaxedGPT Image 1.5: 66%Nano Banana Pro: 86%Nano Banana Pro ahead
GenExam Physics, relaxedGPT Image 1.5: 85%Nano Banana Pro: 95%Nano Banana Pro ahead
GenExam Chemistry, relaxedGPT Image 1.5: 78%Nano Banana Pro: 89%Nano Banana Pro ahead
GenExam Biology, relaxedGPT Image 1.5: 92%Nano Banana Pro: 96%level
GenExam Geography, relaxedGPT Image 1.5: 93%Nano Banana Pro: 97%level
GenExam Computer science, relaxedGPT Image 1.5: 76%Nano Banana Pro: 92%Nano Banana Pro ahead
GenExam Engineering, relaxedGPT Image 1.5: 86%Nano Banana Pro: 95%Nano Banana Pro ahead
GenExam Economics, relaxedGPT Image 1.5: 86%Nano Banana Pro: 97%Nano Banana Pro ahead
GenExam Music, relaxedGPT Image 1.5: 71%Nano Banana Pro: 91%Nano Banana Pro ahead
GenExam History, relaxedGPT Image 1.5: 91%Nano Banana Pro: 100%Nano Banana Pro ahead
GenExam overall, relaxedGPT Image 1.5: 82%Nano Banana Pro: 94%Nano Banana Pro ahead
Qwen Image Bench qualityGPT Image 1.5: 55 / 100Nano Banana Pro: 56 / 100level
Qwen Image Bench aestheticsGPT Image 1.5: 61 / 100Nano Banana Pro: 60 / 100level
Qwen Image Bench alignmentGPT Image 1.5: 62 / 100Nano Banana Pro: 61 / 100level
Qwen Image Bench real-world fidelityGPT Image 1.5: 54 / 100Nano Banana Pro: 54 / 100level
Qwen Image Bench creative generationGPT Image 1.5: 66 / 100Nano Banana Pro: 66 / 100level
Qwen Image Bench overallGPT Image 1.5: 60 / 100Nano Banana Pro: 59 / 100level
WISE Verified overallGPT Image 1.5: 83%Nano Banana Pro: 88%Nano Banana Pro ahead
WISE cultureGPT Image 1.5: 89%Nano Banana Pro: 90%level
WISE timeGPT Image 1.5: 69%Nano Banana Pro: 82%Nano Banana Pro ahead
WISE spaceGPT Image 1.5: 88%Nano Banana Pro: 93%level
WISE biologyGPT Image 1.5: 80%Nano Banana Pro: 82%level
WISE physicsGPT Image 1.5: 76%Nano Banana Pro: 87%Nano Banana Pro ahead
WISE chemistryGPT Image 1.5: 78%Nano Banana Pro: 88%Nano Banana Pro ahead
GRADE reasoningGPT Image 1.5: 55 / 100Nano Banana Pro: 78 / 100Nano Banana Pro ahead
GRADE consistencyGPT Image 1.5: 82 / 100Nano Banana Pro: 90 / 100Nano Banana Pro ahead
GRADE readabilityGPT Image 1.5: 91 / 100Nano Banana Pro: 96 / 100Nano Banana Pro ahead
GRADE accuracyGPT Image 1.5: 16 / 100Nano Banana Pro: 46 / 100Nano Banana Pro ahead
GEBench Chinese, single-stepGPT Image 1.5: 84 / 100Nano Banana Pro: 85 / 100level
GEBench Chinese, multi-stepGPT Image 1.5: 57 / 100Nano Banana Pro: 69 / 100Nano Banana Pro ahead
GEBench Chinese, fictional appGPT Image 1.5: 60 / 100Nano Banana Pro: 66 / 100Nano Banana Pro ahead
GEBench Chinese, real appGPT Image 1.5: 56 / 100Nano Banana Pro: 64 / 100Nano Banana Pro ahead
GEBench Chinese, groundingGPT Image 1.5: 53 / 100Nano Banana Pro: 65 / 100Nano Banana Pro ahead
GEBench Chinese, overallGPT Image 1.5: 63 / 100Nano Banana Pro: 70 / 100Nano Banana Pro ahead
GEBench English, single-stepGPT Image 1.5: 81 / 100Nano Banana Pro: 84 / 100level
GEBench English, multi-stepGPT Image 1.5: 59 / 100Nano Banana Pro: 70 / 100Nano Banana Pro ahead
GEBench English, fictional appGPT Image 1.5: 64 / 100Nano Banana Pro: 46 / 100GPT Image 1.5 ahead
GEBench English, real appGPT Image 1.5: 59 / 100Nano Banana Pro: 47 / 100GPT Image 1.5 ahead
GEBench English, groundingGPT Image 1.5: 49 / 100Nano Banana Pro: 59 / 100Nano Banana Pro ahead
GEBench English, overallGPT Image 1.5: 63 / 100Nano Banana Pro: 61 / 100level
GenAI-Bench overall preferenceGPT Image 1.5: 1,047Nano Banana Pro: 1,021GPT Image 1.5 ahead
GenAI-Bench visual qualityGPT Image 1.5: 975Nano Banana Pro: 1,043Nano Banana Pro ahead
Infographics factualityGPT Image 1.5: 985Nano Banana Pro: 1,102Nano Banana Pro ahead
General image editingGPT Image 1.5: 995Nano Banana Pro: 1,051Nano Banana Pro ahead
Character editingGPT Image 1.5: 1,025Nano Banana Pro: 1,050Nano Banana Pro ahead
Creative editingGPT Image 1.5: 1,017Nano Banana Pro: 1,004level
Object and environment editingGPT Image 1.5: 976Nano Banana Pro: 1,042Nano Banana Pro ahead
Editing with 1-3 input imagesGPT Image 1.5: 1,014Nano Banana Pro: 1,056Nano Banana Pro ahead
StylizationGPT Image 1.5: 996Nano Banana Pro: 1,045Nano Banana Pro ahead

GenExam from Aug 26, 2026 · Qwen Image Bench from Aug 26, 2026 · WISE Verified from Aug 26, 2026 · GRADE from Aug 26, 2026 · GEBench from Aug 26, 2026 · Gemini 3.1 Flash Image model card from Aug 26, 2026

All individual values with sources
RatingGPT Image 1.5Nano Banana ProSource
GenExam Mathematics, strict27%56%GenExamRetrieved Aug 26, 2026
GenExam Physics, strict46%75%GenExamRetrieved Aug 26, 2026
GenExam Chemistry, strict39%60%GenExamRetrieved Aug 26, 2026
GenExam Biology, strict56%76%GenExamRetrieved Aug 26, 2026
GenExam Geography, strict61%76%GenExamRetrieved Aug 26, 2026
GenExam Computer science, strict36%66%GenExamRetrieved Aug 26, 2026
GenExam Engineering, strict44%71%GenExamRetrieved Aug 26, 2026
GenExam Economics, strict43%88%GenExamRetrieved Aug 26, 2026
GenExam Music, strict29%62%GenExamRetrieved Aug 26, 2026
GenExam History, strict51%98%GenExamRetrieved Aug 26, 2026
GenExam overall, strict43%73%GenExamRetrieved Aug 26, 2026
GenExam Mathematics, relaxed66%86%GenExamRetrieved Aug 26, 2026
GenExam Physics, relaxed85%95%GenExamRetrieved Aug 26, 2026
GenExam Chemistry, relaxed78%89%GenExamRetrieved Aug 26, 2026
GenExam Biology, relaxed92%96%GenExamRetrieved Aug 26, 2026
GenExam Geography, relaxed93%97%GenExamRetrieved Aug 26, 2026
GenExam Computer science, relaxed76%92%GenExamRetrieved Aug 26, 2026
GenExam Engineering, relaxed86%95%GenExamRetrieved Aug 26, 2026
GenExam Economics, relaxed86%97%GenExamRetrieved Aug 26, 2026
GenExam Music, relaxed71%91%GenExamRetrieved Aug 26, 2026
GenExam History, relaxed91%100%GenExamRetrieved Aug 26, 2026
GenExam overall, relaxed82%94%GenExamRetrieved Aug 26, 2026
Qwen Image Bench quality55 / 10056 / 100Qwen Image BenchRetrieved Aug 26, 2026
Qwen Image Bench aesthetics61 / 10060 / 100Qwen Image BenchRetrieved Aug 26, 2026
Qwen Image Bench alignment62 / 10061 / 100Qwen Image BenchRetrieved Aug 26, 2026
Qwen Image Bench real-world fidelity54 / 10054 / 100Qwen Image BenchRetrieved Aug 26, 2026
Qwen Image Bench creative generation66 / 10066 / 100Qwen Image BenchRetrieved Aug 26, 2026
Qwen Image Bench overall60 / 10059 / 100Qwen Image BenchRetrieved Aug 26, 2026
WISE Verified overall83%88%WISE VerifiedRetrieved Aug 26, 2026
WISE culture89%90%WISE VerifiedRetrieved Aug 26, 2026
WISE time69%82%WISE VerifiedRetrieved Aug 26, 2026
WISE space88%93%WISE VerifiedRetrieved Aug 26, 2026
WISE biology80%82%WISE VerifiedRetrieved Aug 26, 2026
WISE physics76%87%WISE VerifiedRetrieved Aug 26, 2026
WISE chemistry78%88%WISE VerifiedRetrieved Aug 26, 2026
GRADE reasoning55 / 10078 / 100GRADERetrieved Aug 26, 2026
GRADE consistency82 / 10090 / 100GRADERetrieved Aug 26, 2026
GRADE readability91 / 10096 / 100GRADERetrieved Aug 26, 2026
GRADE accuracy16 / 10046 / 100GRADERetrieved Aug 26, 2026
GEBench Chinese, single-step84 / 10085 / 100GEBenchRetrieved Aug 26, 2026
GEBench Chinese, multi-step57 / 10069 / 100GEBenchRetrieved Aug 26, 2026
GEBench Chinese, fictional app60 / 10066 / 100GEBenchRetrieved Aug 26, 2026
GEBench Chinese, real app56 / 10064 / 100GEBenchRetrieved Aug 26, 2026
GEBench Chinese, grounding53 / 10065 / 100GEBenchRetrieved Aug 26, 2026
GEBench Chinese, overall63 / 10070 / 100GEBenchRetrieved Aug 26, 2026
GEBench English, single-step81 / 10084 / 100GEBenchRetrieved Aug 26, 2026
GEBench English, multi-step59 / 10070 / 100GEBenchRetrieved Aug 26, 2026
GEBench English, fictional app64 / 10046 / 100GEBenchRetrieved Aug 26, 2026
GEBench English, real app59 / 10047 / 100GEBenchRetrieved Aug 26, 2026
GEBench English, grounding49 / 10059 / 100GEBenchRetrieved Aug 26, 2026
GEBench English, overall63 / 10061 / 100GEBenchRetrieved Aug 26, 2026
GenAI-Bench overall preference1,0471,021Gemini 3.1 Flash Image model cardRetrieved Aug 26, 2026
GenAI-Bench visual quality9751,043Gemini 3.1 Flash Image model cardRetrieved Aug 26, 2026
Infographics factuality9851,102Gemini 3.1 Flash Image model cardRetrieved Aug 26, 2026
General image editing9951,051Gemini 3.1 Flash Image model cardRetrieved Aug 26, 2026
Character editing1,0251,050Gemini 3.1 Flash Image model cardRetrieved Aug 26, 2026
Creative editing1,0171,004Gemini 3.1 Flash Image model cardRetrieved Aug 26, 2026
Object and environment editing9761,042Gemini 3.1 Flash Image model cardRetrieved Aug 26, 2026
Editing with 1-3 input images1,0141,056Gemini 3.1 Flash Image model cardRetrieved Aug 26, 2026
Stylization9961,045Gemini 3.1 Flash Image model cardRetrieved Aug 26, 2026

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