Nano Banana 2 Prompt Guide: The Ultimate 4K Image Masterclass

Nano Banana 2 (also known as Gemini 3.1 Flash Image) is a fast AI tool that makes high-quality 4K images. To get the best results, you should write prompts like a natural story (narrative prompts) instead of just a list of keywords. A common problem is that Nano Banana 2 sometimes struggles with spatial logic, meaning it might place objects in the wrong spot in busy scenes.

GlobalGPT makes professional AI art easy. For only $10.8 (Pro Plan), you get full access to Nano Banana 2, ナノバナナプロ, フラックス 旅の途中 on one platform. Unlike official sites, GlobalGPT has no regional blocks and no hard payment rules. You also get そら2フラッシュ そして ベオ 3.1 to turn your 4K pictures into high-end videos instantly.

GlobalGPT covers your entire workflow. You can use ChatGPT 5.2 または クロード 4.5 to research ideas, create 4K art with Nano Banana 2, and then use Veo 3.1 or Kling for video production. You can complete your whole project on one simple dashboard without ever switching websites.

Nano Banana 2 Prompt Guide: How to Create Pro-Level 4K Images with High Consistency?

Nano Banana 2 is the commercial name for Gemini 3.1 Flash Image. It is built for speed but delivers the same sharpness as the Nano Banana Pro model. The biggest advantage is its 4K Native Export, which means your images won’t look blurry when printed or used on high-res displays.

To get the best quality, you need to understand its 14-Object High Fidelity system. This allows you to have 14 different items in one picture without the AI getting confused. It also uses Real-Time Web Grounding to look up what real buildings or historical people look like before it starts drawing.

[Quick Start Case]

Basic Prompt: “A futuristic city with a blue car.”

Optimized Narrative Prompt: “A cinematic wide shot of a neon-lit Cyberpunk city in 2077. In the foreground, a sleek electric blue sports car with carbon fiber textures is parked on a wet asphalt road reflecting the neon signs. Use 4K resolution and sharp focus on the car’s headlights.” Visual Expectation: A massive leap in lighting, reflection accuracy, and texture detail compared to the basic version.

How to Write Effective Prompts for Nano Banana 2? (The Narrative Strategy)

In 2026, keyword stacking (like “4k, high detail, masterpiece”) is dead. Nano Banana 2 understands natural language. You should write like you are telling a story. Include specific Camera Metadata like “35mm lens” or “F/1.8 aperture” to tell the AI exactly how much background blur you want.

Using World Knowledge is the secret weapon. If you ask for a “Glass House in the Rain,” the model will actually calculate how rain drops should realistically look on glass based on physics data it learned during training.

[Case Study 1: Architectural Visualization]

Prompt: “A photorealistic exterior view of a modern glass villa tucked into a Norwegian pine forest during a light rainstorm. 35mm lens, low-angle shot. Captured in 4K, showing tiny raindrops sliding down the glass with realistic refraction and volumetric fog between the trees.” Visual Expectation: Perfect transparency in the glass and high-detail environmental effects that look like a real photograph.

How Do I Trigger Nano Banana 2’s “Thinking Mode” for Complex Prompts?

One of the most powerful tools in Nano Banana 2 is the Thinking Level. You can choose between Default, Advanced, or Dynamic modes. When you turn on Thinking Mode, the AI spends extra time reasoning through your prompt before it draws a single pixel.

This is critical for Spatial Reasoning. If your prompt involves objects that must fit together—like gears in a watch—the Advanced Thinking Mode ensures they aren’t just floating randomly but are logically connected.

[Case Study 2: Complex Spatial Logic]

Prompt: “(Set Thinking Level: Advanced) A detailed macro shot of a Steampunk clockwork heart. Every brass gear and copper wire must be logically connected to a central glowing core. Show the internal mechanical movement with metallic textures and realistic shadows in 4K quality.” Visual Expectation: A mechanically plausible object where the physics of the gears look “correct” rather than abstract.

The Ultimate Guide to Character Consistency: Keeping 5 Characters Identical Across Scenes

Nano Banana 2 solved the biggest problem in AI art: Subject Consistency. By using the Character Naming Protocol, you can name a person (e.g., “Subject Alpha”) and the AI will remember their face, hair, and clothes across different prompts. You can now keep up to 5 characters perfectly identical in a single project.

This makes it the best tool for Sequential Storytelling or creating graphic novels. You no longer need to use external “face swap” tools because the consistency is built into the Gemini 3.1 architecture.

[Case Study 3: Sequential Storytelling]

Prompt 1: “Character: Explorer Mia (young woman, red braid, green tactical vest). Mia standing in a sunlit jungle, looking at an ancient stone map. 4K, realistic style.” Prompt 2: “Character: Explorer Mia (same appearance). Mia is now inside a dark cave, holding a torch that lights up her face. The red braid and green vest must remain identical to the previous scene.” Visual Expectation: Two different scenes where the protagonist looks like the exact same person.

Nano Banana 2 vs. Midjourney v7 vs. Nano Banana Pro: Which One Should You Choose?

When comparing Nano Banana 2 to Midjourney v7, the clear winner for speed is NB2. However, Midjourney still holds an edge in artistic “stylization.” If you need Text Rendering, Nano Banana 2 is far superior, as it can write perfect English and Chinese characters without the typical AI typos.

GlobalGPT allows you to switch between these models with one click. In the middle of your project, you can use Nano Banana 2 for fast drafting and then use Midjourney for a specific artistic filter, all within the same dashboard.

[Case Study 4: Multi-Language Text Rendering]

Prompt: A professional graphic design for a minimalist Tech Conference poster. At the top, the primary text reads ‘AI FUTURE 2026’ in a bold, clean white sans-serif typeface. Centered directly below it, the secondary text ‘UNLEASHING THE NEXT ERA’ is rendered in a smaller, elegant silver font. The background consists of a high-contrast deep navy blue with soft volumetric lighting and intricate digital network patterns. Captured in 4K解像度 with perfect typographic alignment and zero artifacts.

What are the Usage Limits for Nano Banana 2 in 2026?

Official Google 制限 can be frustrating. Free users only get 100 images per day, and paid users are capped at 1,000. If you are a professional designer, you will hit these limits quickly.

GlobalGPT solves this. By using our platform, you can access Nano Banana 2 without the strict regional blocks or payment issues of the official Gemini App. Our Pro Plan ($10.8) is specifically designed for high-volume creators who need constant access to Nano Banana 2, Flux, and Midjourney.

Advanced Workflow on GlobalGPT: Converting Nano Banana 2 4K Static Images into Videos

The real magic happens when you combine Nano Banana 2 with Veo 3.1. Because NB2 produces 4K static assets with high subject consistency, these images serve as perfect “Keyframes” for AI video generation.

On GlobalGPT, you can create your character in Nano Banana 2 and immediately send that 4K image to Veo 3.1 or Sora 2 Flash. This “End-to-End” cycle saves hours of manual editing.

[End-to-End Case Study]

Step 1 (Sription): Scripting: Use ChatGPT 5.2 to write a detailed storyboard.

Step 2 (Visuals): 用途 Midjourney or Nano Banana Pro to create high-quality images of your characters.

Step 3 (Video): Generate Clean 4K Clips with the top models on GlobalGPT

People Also Ask: Frequently Asked Questions about Nano Banana 2

Is Nano Banana 2 無料でご利用いただけます? Official access offers a free tier of 100 images per day. For unlimited professional use and 4K features, the GlobalGPT Pro Plan is the recommended choice.

Can Nano Banana 2 render Chinese text accurately? Yes. Unlike older AI models, Nano Banana 2 (Gemini 3.1) is trained on massive multilingual datasets and can render complex Chinese characters with over 95% accuracy in 4K.

How to fix “Blurry Backgrounds” in NB2 Prompts? If your background is too blurry, adjust your prompt to include “F/8 aperture” or “Deep depth of field.” This tells the AI to keep both the foreground and background in sharp focus.

Does GlobalGPT support the Thinking Mode for Nano Banana 2? Absolutely. GlobalGPT provides full control over the Thinking Level (Default, Advanced, Dynamic) so you can optimize for either speed or complex logic.