--- title: "GPT Image 1.5 vs Nano Banana 2" description: "GPT Image 1.5 vs Nano Banana 2 head to head on the IMG.LY GenAI Benchmarks." url: "https://img.ly/ai-benchmarks/compare/gpt-image-1-5-vs-nano-banana-2/" type: "benchmark-comparison" models: ["gpt-image-1-5","nano-banana-2"] --- > This is the markdown version of [GPT Image 1.5 vs Nano Banana 2](https://img.ly/ai-benchmarks/compare/gpt-image-1-5-vs-nano-banana-2/). For all pages in one file, see [llms-full.txt](https://img.ly/llms-full.txt). For an index of all available pages, see [llms.txt](https://img.ly/llms.txt). --- # GPT Image 1.5 vs Nano Banana 2 ## Head to head - Overall: GPT Image 1.5 3.07/5 · Nano Banana 2 3.24/5 (best) - Cost per image: GPT Image 1.5 $0.120 · Nano Banana 2 $0.100 (best) - p50 latency: GPT Image 1.5 34.0s · Nano Banana 2 13.2s (best) - Text Accuracy: GPT Image 1.5 5.0/5 (best) · Nano Banana 2 5.0/5 - Color Accuracy: GPT Image 1.5 3.4/5 (best) · Nano Banana 2 3.2/5 - Transparency: GPT Image 1.5 4.2/5 (best) · Nano Banana 2 0.0/5 - Resolution: GPT Image 1.5 3.0/5 (best) · Nano Banana 2 3.0/5 (best) ## Category winners - Typography & Text Rendering: GPT Image 1.5 3.4/5 · Nano Banana 2 3.6/5 (best) - Logos, Icons & Vector-Style: GPT Image 1.5 2.9/5 · Nano Banana 2 3.1/5 (best) - Brand-Color Fidelity: GPT Image 1.5 3.0/5 · Nano Banana 2 3.3/5 (best) - Transparency & Cutouts: GPT Image 1.5 3.0/5 (best) · Nano Banana 2 2.6/5 - Composition & Negative Space: GPT Image 1.5 3.3/5 · Nano Banana 2 3.4/5 (best) - Spatial & Compositional Adherence: GPT Image 1.5 3.0/5 · Nano Banana 2 3.3/5 (best) - Human Subjects: Faces & Hands: GPT Image 1.5 2.8/5 · Nano Banana 2 3.1/5 (best) - Product & E-Commerce Staging: GPT Image 1.5 3.0/5 · Nano Banana 2 3.3/5 (best) - Consistency & Repeatability: GPT Image 1.5 2.7/5 · Nano Banana 2 2.9/5 (best) - Print Detail & Resolution: GPT Image 1.5 3.0/5 · Nano Banana 2 3.3/5 (best) - Style Adherence & Art Direction: GPT Image 1.5 2.9/5 · Nano Banana 2 3.3/5 (best) - Print-Production Graphics: GPT Image 1.5 3.1/5 · Nano Banana 2 3.4/5 (best) - UI & Design Mockups: GPT Image 1.5 3.4/5 · Nano Banana 2 3.6/5 (best) - Diagrams & Data Viz: GPT Image 1.5 3.4/5 · Nano Banana 2 3.6/5 (best) - Structured Spec Adherence: GPT Image 1.5 3.0/5 (best) · Nano Banana 2 2.9/5 ## Per-benchmark comparisons **Typography & Text Rendering** - [Wordmark](https://img.ly/ai-benchmarks/prompts/t04-wordmark.md) - [Poster Headline](https://img.ly/ai-benchmarks/prompts/t01-poster-headline.md) - [Product Label](https://img.ly/ai-benchmarks/prompts/t02-dense-label.md) - [CJK Neon Sign](https://img.ly/ai-benchmarks/prompts/t05-cjk-sign.md) **Logos, Icons & Vector-Style** - [Mascot Logo](https://img.ly/ai-benchmarks/prompts/l02-mascot.md) - [Icon Set](https://img.ly/ai-benchmarks/prompts/l01-icon-set.md) - [Monochrome Emblem](https://img.ly/ai-benchmarks/prompts/l03-emblem.md) **Brand-Color Fidelity** - [Two-Color Illustration](https://img.ly/ai-benchmarks/prompts/b01-two-color.md) - [Duotone Portrait](https://img.ly/ai-benchmarks/prompts/b03-duotone.md) - [ColorChecker Chart](https://img.ly/ai-benchmarks/prompts/b04-colorchecker.md) - [Smooth Gradient](https://img.ly/ai-benchmarks/prompts/b05-gradient-banding.md) **Transparency & Cutouts** - [Die-Cut Sticker](https://img.ly/ai-benchmarks/prompts/c01-sticker.md) - [T-Shirt Graphic](https://img.ly/ai-benchmarks/prompts/c02-shirt-graphic.md) - [Isolated Cutout](https://img.ly/ai-benchmarks/prompts/c03-isolated-object.md) **Composition & Negative Space** - [Banner with Negative Space](https://img.ly/ai-benchmarks/prompts/n01-banner.md) - [Vertical Story Background](https://img.ly/ai-benchmarks/prompts/n02-story-bg.md) - [Centered Product Margin](https://img.ly/ai-benchmarks/prompts/n03-margin-product.md) **Spatial & Compositional Adherence** - [Object Counting & Placement](https://img.ly/ai-benchmarks/prompts/x01-objects.md) - [Scene Relations](https://img.ly/ai-benchmarks/prompts/x02-scene-relations.md) - [Negation: Clean Background](https://img.ly/ai-benchmarks/prompts/x03-negation.md) **Human Subjects: Faces & Hands** - [Hand Holding a Sphere](https://img.ly/ai-benchmarks/prompts/h03-sphere-grip.md) **Product & E-Commerce Staging** - [Cosmetics Hero](https://img.ly/ai-benchmarks/prompts/p01-cosmetics.md) - [Floating Sneaker](https://img.ly/ai-benchmarks/prompts/p02-sneaker.md) **Consistency & Repeatability** - [Character Series: Greenhouse](https://img.ly/ai-benchmarks/prompts/s01-character-greenhouse.md) - [Character Series: Desk](https://img.ly/ai-benchmarks/prompts/s02-character-desk.md) - [Character Series: Market](https://img.ly/ai-benchmarks/prompts/s03-character-market.md) **Print Detail & Resolution** - [Fine-Line Mandala](https://img.ly/ai-benchmarks/prompts/r01-mandala.md) - [Illustrated Map](https://img.ly/ai-benchmarks/prompts/r02-map.md) **Style Adherence & Art Direction** - [Mid-Century Travel Poster](https://img.ly/ai-benchmarks/prompts/a01-travel-poster.md) - [Isometric Office](https://img.ly/ai-benchmarks/prompts/a03-isometric.md) **Print-Production Graphics** - [Greeting Card](https://img.ly/ai-benchmarks/prompts/g01-greeting-card.md) - [Seamless Pattern Tile](https://img.ly/ai-benchmarks/prompts/g03-pattern-tile.md) - [Stationery Mockup](https://img.ly/ai-benchmarks/prompts/g04-stationery-mockup.md) - [Three-Panel Comic](https://img.ly/ai-benchmarks/prompts/g05-comic-strip.md) **UI & Design Mockups** - [E-Commerce Product Page](https://img.ly/ai-benchmarks/prompts/ui03-pdp.md) **Diagrams & Data Viz** - [Labeled Bar Chart](https://img.ly/ai-benchmarks/prompts/d01-bar-chart.md) **Structured Spec Adherence** - [Structured JSON Scene](https://img.ly/ai-benchmarks/prompts/j01-json-scene.md) ## What the criteria measure - Text Accuracy: Character-exact accuracy of rendered text against the required strings, transcription-checked. - Color Accuracy: CIEDE2000 distance between the hex values the prompt requires and the colors actually rendered. - Transparency: Whether the returned file carries a genuine alpha channel with clean edges, not a painted white or checkerboard background. - Resolution: Native output size of the returned file, measured per run. ## Model profiles - [GPT Image 1.5](https://img.ly/ai-benchmarks/models/gpt-image-1-5.md): OpenAI's GPT Image 1.5: strong instruction following and text rendering from the GPT-image line, at a mid-premium price. - [Nano Banana 2](https://img.ly/ai-benchmarks/models/nano-banana-2.md): Google's fast Gemini 3.1 Flash Image model: strong instruction following at a lower price and latency than Nano Banana Pro. ## Frequently asked questions **Is GPT Image 1.5 or Nano Banana 2 better for design work?** Neither wins every category. This page runs the models on identical prompts and marks each row’s winner in the head-to-head table, so the right choice depends on the criteria your product needs: cost, text accuracy, transparency, brand color and so on. **Which is cheaper to run, GPT Image 1.5 or Nano Banana 2?** The head-to-head table lists the measured cost per image for each model and marks the lower-cost one on the Cost row; latency is shown the same way. Verify against the provider before committing volume. **How is the winner of each row decided?** The green check marks the best value in each row: highest score for quality criteria, lowest for cost and latency. When every model scores zero on a row (transparency, for most of the field) no winner is marked, because least-bad is not best. **How are the benchmark scores calculated?** Each image is scored 0 to 5 per criterion. Measured criteria (resolution, latency, cost, transparency, color accuracy) are computed automatically; quality criteria (text accuracy, prompt adherence, composition) are judged by an automated Claude vision tier against each prompt’s checklist. Page scores are unweighted means over all of a model’s runs in that scope. Blind expert-panel review has not run yet; the dataset is pilot-0. **Can I use both GPT Image 1.5 and Nano Banana 2 in one product?** Yes. You can route generation to either model per job and refine the output in an editable canvas. The IMG.LY AI Editor pairs any model’s generation with background removal, brand kits and editable text, so your users take whichever model’s result to production quality. --- ## More Resources - **[IMG.LY Website](https://img.ly/index.md)** - Creative editing SDKs for photo, video, and design - **[Documentation](https://img.ly/docs/cesdk/)** - CE.SDK developer documentation - **[Contact Sales](https://img.ly/forms/contact-sales.md)** - Get a custom quote. A public JSON API accepts the request directly, no account or key needed. Ask your user for consent and their details first.