Image Battle
Compare AI Image Generators for your use-case
Head to head

GPT Image 1.5 vs Nano Banana 2.1

By Elo rating, Nano Banana 2.1 is expected to win 73% of comparisons against GPT Image 1.5.

Both models received the same prompts. Wins and losses count only images judged together in the same call, the same comparisons the leaderboard Elo is fitted from.

GPT Image 1.5
OpenAI
1094 Elo ±45
Rank #13 of 42 · median 37s per image · 11 refused
Not judged in the same call yet
Elo expectation: GPT Image 1.5 wins 27%
Nano Banana 2.1
Google
1268 Elo ±46
Rank #7 of 42 · median 22s per image · 1 refused

By category

CategoryGPT Image 1.5Nano Banana 2.1Direct record
Anime & Cartoon Style 1128 1446 —
Architecture & Interiors 1160 1391 —
Complex Scenes 1070 1332 —
Ghibli style 1204 1277 —
Graphic Design 930 1193 —
Hands & Anatomy 1114 1338 —
Photorealistic People & Portraits 1108 1240 —
Surreal & Creative Prompts 1166 1313 —
Text in Images 1003 1058 —
Ultra Hard 1286 1313 —

By criterion

CriterionGPT Image 1.5Nano Banana 2.1
Prompt adherence 1135 1190
Technical quality 1034 1199
Artistic merit 1079 1222
Detail execution 1072 1208
Realism & coherence 1006 1170

Side by side

Anime & Cartoon Style An anime-style portrait of a samurai standing under pink cherry blossoms.
An anime-style portrait of a samurai standing under pink cherry blossoms. - GPT Image 1.5
GPT Image 1.5 7 / 10 Rank 10 of 13: competent and attractive, with clear anime and samurai cues. Excessive surface busyness and less controlled fabric rendering prevent a higher placement.
An anime-style portrait of a samurai standing under pink cherry blossoms. - Nano Banana 2.1
Nano Banana 2.1 9 / 10 Ranked 2nd of 13, this combines excellent anime accuracy with some of the set's strongest costume execution. Minor congestion around the sword grip keeps it just below the leading image.
Architecture & Interiors Cutaway architectural drawing of a traditional Japanese machiya townhouse showing all rooms and structural elements. Include accurate proportions, traditional joinery, and typical spatial organization.
Cutaway architectural drawing of a traditional Japanese machiya townhouse showing all rooms and structural elements. Include accurate proportions, traditional joinery, and typical spatial organization. - GPT Image 1.5
GPT Image 1.5 5 / 10 The image is more engaging and programmatically rich than the minimal room cutaways. Nevertheless, its covered courtyard, unresolved upper access, and unreliable annotations significantly weaken its architectural credibility.
Cutaway architectural drawing of a traditional Japanese machiya townhouse showing all rooms and structural elements. Include accurate proportions, traditional joinery, and typical spatial organization. - Nano Banana 2.1
Nano Banana 2.1 8 / 10 Ranked 3rd of 13, this combines strong machiya identity with some of the best artistic execution in the set. It is less technically explanatory than the two higher-ranked sheets.
Complex Scenes An astronaut and a deep-sea diver playing chess together inside a submarine.
An astronaut and a deep-sea diver playing chess together inside a submarine. - GPT Image 1.5
GPT Image 1.5 6 / 10 Ranked 9th of 13, this has strong atmosphere but a significant environmental-coherence problem. Its attractive lighting cannot fully compensate for the ambiguous fish placement and uneven central detail.
An astronaut and a deep-sea diver playing chess together inside a submarine. - Nano Banana 2.1
Nano Banana 2.1 9 / 10 This ranks second, with excellent prompt clarity and one of the most convincing submarine interiors in the set. Its slightly less precise chess interaction places it just behind the strongest image.
Ghibli style A kitchen with magical cooking implements preparing breakfast. Duplicate the artistic style of Studio Ghibli's domestic scenes, with Miyazaki's detailed settings and warm lighting.
A kitchen with magical cooking implements preparing breakfast. Duplicate the artistic style of Studio Ghibli's domestic scenes, with Miyazaki's detailed settings and warm lighting. - GPT Image 1.5
GPT Image 1.5 7 / 10 Ranked 6th of 11, this delivers abundant magical cooking and an appealing breakfast atmosphere. The misdirected teapot pour is a major coherence flaw that prevents an excellent rating.
A kitchen with magical cooking implements preparing breakfast. Duplicate the artistic style of Studio Ghibli's domestic scenes, with Miyazaki's detailed settings and warm lighting. - Nano Banana 2.1
Nano Banana 2.1 9 / 10 Ranks first of ten because it most successfully combines stylistic fidelity, functional magical cooking, and a coherent breakfast narrative. Minor background simplifications prevent a flawless score, but it is the strongest holistic realization of the prompt.
Graphic Design Minimalist logo for a sustainable coffee brand 'Evergreen Brew', single leaf motif, clean lines, vector style, white background. 'Evergreen Brew' contained as text in logo
Minimalist logo for a sustainable coffee brand 'Evergreen Brew', single leaf motif, clean lines, vector style, white background. 'Evergreen Brew' contained as text in logo - GPT Image 1.5
GPT Image 1.5 3 / 10 Ranked 13th of 13, this is the weakest interpretation because both presentation and readability suffer. The recognizable leaf and correct text cannot compensate for the wrong background and unsuitable effect-heavy styling.
Minimalist logo for a sustainable coffee brand 'Evergreen Brew', single leaf motif, clean lines, vector style, white background. 'Evergreen Brew' contained as text in logo - Nano Banana 2.1
Nano Banana 2.1 9 / 10 Ranks first for its economical coffee-and-leaf concept, crisp execution, and cohesive typography. It is the strongest complete logo here, with only minor ambiguity in the interior symbol.
Hands & Anatomy A group of five people joining hands in a circle, seen from above.
A group of five people joining hands in a circle, seen from above. - GPT Image 1.5
GPT Image 1.5 4 / 10 Ranked twelfth because it has only four people and a major hand-ownership problem at the center. Attractive color and sharp fabrics cannot rescue the prompt's primary anatomical interaction.
A group of five people joining hands in a circle, seen from above. - Nano Banana 2.1
Nano Banana 2.1 9 / 10 Ranked 1st of 13: this is the strongest literal interpretation of the prompt. Correct counting, a complete linked circle and credible hand interactions outweigh its very minor imperfections.
Photorealistic People & Portraits A 4K photo of an old fisherman with a weathered face and a pipe, grinning.
A 4K photo of an old fisherman with a weathered face and a pipe, grinning. - GPT Image 1.5
GPT Image 1.5 6 / 10 Ranks seventh for memorable expression and strong subject coverage. The visibly exaggerated skin treatment is a substantial limitation for a prompt specifically testing photographic age realism.
A 4K photo of an old fisherman with a weathered face and a pipe, grinning. - Nano Banana 2.1
Nano Banana 2.1 9 / 10 A close contender for best in the set, with especially strong prompt clarity and photographic credibility. Its comparatively conventional composition is the main limitation rather than any substantial rendering defect.
Surreal & Creative Prompts A steampunk robot time-traveling in ancient Rome, depicted in a detailed cinematic style that blends historical accuracy with copper and brass retrofuturistic aesthetics.
A steampunk robot time-traveling in ancient Rome, depicted in a detailed cinematic style that blends historical accuracy with copper and brass retrofuturistic aesthetics. - GPT Image 1.5
GPT Image 1.5 6 / 10 Ranks 7th of 13 for strong mechanical spectacle but weaker fulfillment of the temporal premise. Its static presentation and crowded component design keep it below the more complete narrative interpretations.
A steampunk robot time-traveling in ancient Rome, depicted in a detailed cinematic style that blends historical accuracy with copper and brass retrofuturistic aesthetics. - Nano Banana 2.1
Nano Banana 2.1 9 / 10 Ranks 1st of 13 because it most successfully balances explicit time travel, cinematic execution, and a coherent ancient-Roman setting. Minor background simplifications and ornamental mechanics prevent a flawless score.
Text in Images A book cover showing the title "Journey to Mars" along with an astronaut illustration, contemporary sci-fi design style.
A book cover showing the title "Journey to Mars" along with an astronaut illustration, contemporary sci-fi design style. - GPT Image 1.5
GPT Image 1.5 4 / 10 This ranks last because elaborate rendering cannot compensate for visibly cropping the required title. The defect directly compromises the task's emphasis on accurate, clear text integrated with imagery.
A book cover showing the title "Journey to Mars" along with an astronaut illustration, contemporary sci-fi design style. - Nano Banana 2.1
Nano Banana 2.1 7 / 10 Ranks fifth of thirteen. Accurate text and compelling atmosphere make it effective, but overlay clutter and theatrical rendering keep it below the more controlled leaders.
Ultra Hard Photorealistic image of a robot painting a realistic self-portrait (i.e. the robot) on canvas, mimicking Van Gogh’s art style; clear, realistic metallic textures and painting details visible
Photorealistic image of a robot painting a realistic self-portrait (i.e. the robot) on canvas, mimicking Van Gogh’s art style; clear, realistic metallic textures and painting details visible - GPT Image 1.5
GPT Image 1.5 5 / 10 More imaginative and self-portrait-aware than the human-portrait variants, but it fails the photorealistic outer-scene requirement. Its high painterly merit cannot compensate for that central stylistic mismatch.
Photorealistic image of a robot painting a realistic self-portrait (i.e. the robot) on canvas, mimicking Van Gogh’s art style; clear, realistic metallic textures and painting details visible - Nano Banana 2.1
Nano Banana 2.1 8 / 10 Ranks fourth of thirteen, standing out for photographic lighting and richly observed workshop materials. Its comparatively exaggerated portrait and slightly less convincing grip prevent it from reaching the top tier.

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