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Key Highlights

  • 4K Support: Generate images in 1K, 2K, and 4K resolutions
  • Best Text Rendering: Industry-leading text clarity in images
  • Local Editing: Adjust camera angle, focus, color grading, lighting
  • Gemini 3 Pro Powered: Advanced reasoning and real-world knowledge
  • Stable & Fast: ~20 seconds generation time, “strong + stable” feedback

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Background

On November 20, 2025, Google officially released Nano Banana Pro (codename: Gemini 3 Pro Image Preview), a major upgrade from Nano Banana (Gemini 2.5 Flash Image). The new model achieves significant improvements in resolution, text rendering, and editing capabilities. API易 has integrated this model immediately, providing designers and developers with stable, high-quality image generation services.

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Feature Comparison

FeatureNano Banana (2.5)Nano Banana Pro (3.0)Improvement
Max Resolution1024×10244K (4096×4096)🚀 16x pixels
Text RenderingGoodIndustry Best⭐⭐⭐
Local EditingBasicAdvanced⭐⭐⭐
Speed~10s~20s⏱️ Slower but better
ReasoningGemini 2.5 FlashGemini 3 Pro🧠 Significant
PricingStandardStandard💰 Same price

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Core Features

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🎨 4K High Resolution

1K (Standard)

1024×1024 pixelsQuick prototypes, social media

2K (HD)

2048×2048 pixelsWebsite banners, digital ads

4K (Ultra HD)

4096×4096 pixelsPrint materials, professional design

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✍️ Best Text Rendering

  • Clear & Readable: Sharp text edges, accurate font recognition
  • Rich Styles: Multiple fonts, sizes, colors, and effects
  • Multi-language: Perfect support for English, Chinese, and more
  • Precise Layout: Text position, alignment, and spacing
Perfect for:
  • 📊 Posters and promotional materials
  • 🏷️ Brand slogans and advertisements
  • 📰 Social media graphics
  • 🎨 Packaging and product labels

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🛠️ Local Editing

Camera Control

  • Adjust shooting angle
  • Change focal length and depth
  • Control composition

Lighting

  • Scene lighting control
  • Day/night conversion
  • Shadow and highlight adjustment

Color Grading

  • Hue and saturation
  • Contrast and brightness
  • Filters and stylization

Effects

  • Bokeh effect
  • Depth of field
  • Artistic rendering

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Use Cases

Professional Design

  • High-res posters
  • Print materials
  • Brand visual design
  • Product packaging

Text in Images

  • Advertising with text
  • Social media graphics
  • Slogans and captions
  • Infographics

Local Editing

  • Style adjustment
  • Lighting optimization
  • Bokeh effects
  • Detail refinement

Brand Marketing

  • Brand consistency
  • Visual marketing assets
  • Multi-channel content
  • A/B testing materials

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Code Example

import openai

client = openai.OpenAI(
    api_key="your-api-key",
    base_url="https://api.apiyi.com/v1"
)

# Basic image generation
response = client.images.generate(
    model="gemini-3-pro-image-preview",
    prompt="A modern minimalist coffee shop poster with text 'Morning Brew', warm tones, professional photography",
    n=1,
    size="1024x1024",
    quality="hd"
)

image_url = response.data[0].url
print(f"Generated image: {image_url}")

# 4K high-res generation
response = client.images.generate(
    model="gemini-3-pro-image-preview",
    prompt="A 4K tech company poster with text 'AI Changes Future', futuristic style, blue tones",
    size="4096x4096",
    quality="hd"
)

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Best Practices

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Prompt Tips

For Text Rendering: 
✅ Good Prompt:
"A modern minimalist poster with clear, readable text 'Morning Coffee',
sans-serif font, white text on dark blue background, centered"

❌ Avoid:
"Poster with text"  # Too vague
For High-Res Images: 
✅ Good Prompt:
"A 4K ultra-HD product photo, rich details, professional photography,
studio lighting, white background, centered product, soft shadows"

❌ Avoid:
"Product photo"  # Lacks detail

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Resolution Guide

  • 1K (1024×1024):
    • Quick prototypes
    • Social media (Instagram, Twitter)
    • Web thumbnails
  • 2K (2048×2048):
    • Website banners
    • Digital advertising
    • Presentations
  • 4K (4096×4096):
    • Print materials (posters, brochures)
    • Large displays and billboards
    • Professional design projects

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Pricing

ResolutionPrice per ImageUse Case
1K (1024×1024)$0.04Quick prototypes, social media
2K (2048×2048)$0.08Website banners, digital ads
4K (4096×4096)$0.16Print materials, professional design
Special Offer: With API易’s recharge bonus program, enjoy even lower costs! Full 4K HD version priced at only $0.05/image, official 4K price is $0.24/image, approximately 1/5 of the official price~! Bulk generation available with additional discounts.

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Migration Guide

Upgrading from old Nano Banana is simple: 
# Old version
model="gemini-2.5-flash-image"

# New version - just change model name
model="gemini-3-pro-image-preview"

# All other parameters remain the same

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Getting Started

  1. Sign up: https://api.apiyi.com
  2. Add credits: Enjoy recharge bonuses
  3. Check docs: Nano Banana Guide
  4. Start using: Change model to gemini-3-pro-image-preview
Sources:
  • Google Official Blog: Nano Banana Pro Announcement
  • Google Cloud Docs: Gemini 3 Pro Image API
  • API易 User Feedback: “strong + stable”
  • Data retrieved: November 20, 2025