--- title: "Nano Banana 2 vs Stable Diffusion 1.5" description: "Nano Banana 2 vs Stable Diffusion 1.5 head to head on the IMG.LY GenAI Benchmarks." url: "https://img.ly/ai-benchmarks/compare/nano-banana-2-vs-stable-diffusion-1-5/" type: "benchmark-comparison" models: ["nano-banana-2","stable-diffusion-1-5"] --- > This is the markdown version of [Nano Banana 2 vs Stable Diffusion 1.5](https://img.ly/ai-benchmarks/compare/nano-banana-2-vs-stable-diffusion-1-5/). 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). --- # Nano Banana 2 vs Stable Diffusion 1.5 ## Head to head - Overall: Nano Banana 2 3.24/5 (best) · Stable Diffusion 1.5 2.84/5 - Cost per image: Nano Banana 2 $0.100 · Stable Diffusion 1.5 $0.010 (best) - p50 latency: Nano Banana 2 13.2s · Stable Diffusion 1.5 2.1s (best) - Text Accuracy: Nano Banana 2 5.0/5 (best) · Stable Diffusion 1.5 1.2/5 - Color Accuracy: Nano Banana 2 3.2/5 (best) · Stable Diffusion 1.5 2.2/5 - Transparency: Nano Banana 2 0.0/5 · Stable Diffusion 1.5 0.0/5 - Resolution: Nano Banana 2 3.0/5 (best) · Stable Diffusion 1.5 1.0/5 ## Category winners - Typography & Text Rendering: Nano Banana 2 3.6/5 (best) · Stable Diffusion 1.5 2.1/5 - Logos, Icons & Vector-Style: Nano Banana 2 3.1/5 (best) · Stable Diffusion 1.5 3.0/5 - Brand-Color Fidelity: Nano Banana 2 3.3/5 (best) · Stable Diffusion 1.5 2.9/5 - Transparency & Cutouts: Nano Banana 2 2.6/5 (best) · Stable Diffusion 1.5 2.4/5 - Composition & Negative Space: Nano Banana 2 3.4/5 (best) · Stable Diffusion 1.5 2.9/5 - Spatial & Compositional Adherence: Nano Banana 2 3.3/5 (best) · Stable Diffusion 1.5 3.0/5 - Human Subjects: Faces & Hands: Nano Banana 2 3.1/5 (best) · Stable Diffusion 1.5 3.1/5 - Product & E-Commerce Staging: Nano Banana 2 3.3/5 · Stable Diffusion 1.5 3.3/5 (best) - Consistency & Repeatability: Nano Banana 2 2.9/5 · Stable Diffusion 1.5 3.4/5 (best) - Print Detail & Resolution: Nano Banana 2 3.3/5 (best) · Stable Diffusion 1.5 3.2/5 - Style Adherence & Art Direction: Nano Banana 2 3.3/5 · Stable Diffusion 1.5 3.4/5 (best) - Print-Production Graphics: Nano Banana 2 3.4/5 (best) · Stable Diffusion 1.5 3.0/5 - UI & Design Mockups: Nano Banana 2 3.6/5 (best) · Stable Diffusion 1.5 2.1/5 - Diagrams & Data Viz: Nano Banana 2 3.6/5 (best) · Stable Diffusion 1.5 2.5/5 - Structured Spec Adherence: Nano Banana 2 2.9/5 (best) · Stable Diffusion 1.5 2.5/5 ## 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 - [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. - [Stable Diffusion 1.5](https://img.ly/ai-benchmarks/models/stable-diffusion-1-5.md): The 2022 open-weights baseline, included as legacy contrast to show how far design-production readiness has moved since the first mainstream diffusion generation. ## Frequently asked questions **Is Nano Banana 2 or Stable Diffusion 1.5 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, Nano Banana 2 or Stable Diffusion 1.5?** 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 Nano Banana 2 and Stable Diffusion 1.5 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.