Nano Banana Pro
Google's premium image generation model built on Gemini 3 Pro — industry-leading text rendering, 4K resolution support, 10 aspect ratios, and multi-image blending up to 14 references. The choice when image quality and control matter most.
Model Specs
- Released
- Nov 2025
- Aspect ratios
- 10 options
- Output formats
- PNG, JPEG, WEBP
- Pricing varies by
- resolution
- Modalities
- textvision
Image generation capabilities
Aspect ratios, output formats, and style options supported by this model.
About this model
Nano Banana Pro is Google's premium image generation model, released on November 20, 2025 and built on the Gemini 3 Pro foundation. Three things make it distinctive among image models: (1) industry-leading text rendering — the model reliably produces legible, multilingual text inside images at a level no other generator currently matches; (2) 4K resolution output — most competitors cap at 1024×1536 or similar mid-tier sizes, while Nano Banana Pro generates true 4K assets; (3) multi-image blending of up to 14 reference images, with 5-person consistency maintained across generations.
The model supports 10 aspect ratios — 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16 — covering every format from cinematic horizontal to vertical mobile content. Output formats include PNG, JPEG, and WebP. All generated images carry SynthID watermarking (Google's invisible content provenance signal), and the model can optionally use web search to ground generations in current information for an additional small fee.
On Renas AI, Nano Banana Pro is available in the AI Image tool. Reach for it when (a) the image must contain legible text — marketing creative with headlines, infographic captions, product mockups with branding; (b) you need 4K output for print, billboards, or hero campaign assets; (c) you're working with multiple reference images (style guide enforcement, character consistency across a series, brand asset libraries). For everyday image generation, Nano Banana (the cheaper variant) or GPT Image 1.5 may be more cost-efficient.
Key Strengths
Industry-leading text rendering
Generate images with legible, accurate text in multiple languages — headlines, captions, signage, infographic labels. This is widely the weakest area of competing image models and Nano Banana Pro's standout strength.
True 4K resolution support
1K, 2K, and 4K resolution tiers. Most image models cap at ~1500px output — Nano Banana Pro generates print-ready, billboard-quality 4K assets directly without upscaling.
10 aspect ratios — broadest coverage
From 21:9 ultra-wide cinematic to 9:16 vertical mobile. Generate at the exact target dimensions instead of cropping or upscaling. Useful for omnichannel content workflows.
Multi-image blending (up to 14 references)
Provide up to 14 reference images to guide the generation. Useful for style guide enforcement, brand asset consistency, character continuity across a series, or combining elements from multiple sources.
5-person consistency across generations
Google reports the model maintains visual consistency for up to 5 people across multiple generations — critical for character-driven content (illustration series, product mockups with the same talent, narrative visuals).
SynthID provenance watermarking
All Nano Banana Pro outputs carry Google's invisible SynthID watermark — useful for content provenance and AI-content disclosure compliance in regulated industries.
How it compares
Nano Banana Pro sits at the premium end of the image generation spectrum. Compare against OpenAI's GPT Image 1.5 and Black Forest's Flux 2 Pro for different strengths.
| vs. Model | Verdict | Outcome |
|---|
Pros
- Industry-leading text rendering — legible captions, headlines, signs in images
- True 4K resolution support — print-ready output without upscaling
- 10 aspect ratios from 21:9 to 9:16 — broadest coverage on Renas
- Multi-image blending up to 14 references for style/brand consistency
- 5-person visual consistency across generations
- Multiple output formats (PNG, JPEG, WebP)
- SynthID watermarking for content provenance
- Optional web search grounding for current information
Things to consider
- Premium pricing — $0.15/image standard, $0.30 for 4K
- Quality-first optimization means slower generation than budget alternatives
- Newer model = less prompt-engineering literature than Flux or DALL-E communities
- SynthID watermarking may be a constraint for workflows requiring 'unwatermarked' assets
- Photorealism on portraits often outperformed by Flux 2 Pro
Best use cases
Marketing creative with text
Hero banners with headlines and CTAs, social media visuals with captions, ad creative with brand text — all with legible, accurate text rendering. Reduces the need for post-generation text overlay.
4K hero assets and print materials
Campaign hero visuals, billboards, magazine covers, large-format print materials. 4K output means production-ready assets without upscaling artifacts.
Brand consistency across asset libraries
Use multi-image blending to keep style consistent across an entire brand library — same lighting, same color palette, same character treatment across hundreds of variations.
Infographics and explanatory visuals
Process diagrams with labels, comparison charts with text, illustrated concepts where caption legibility matters. Nano Banana Pro's text rendering shines here.
Character-driven content series
Tutorial illustrations with consistent character appearance, narrative visuals (comics, storyboards), educational content with the same instructor figure across episodes.
Multilingual marketing assets
Generate the same composition with text in different languages — particularly valuable since accurate non-English text rendering is rare among competing models.
How to use it on Renas AI
- 1
Step 1
Open the AI Image tool
Navigate to AI Image in the Renas dashboard. Pick Nano Banana Pro from the model selector — it's marked as a Google variant. The tool shows live credit cost based on resolution and any web search add-ons.
- 2
Step 2
Pick aspect ratio and resolution tier
Choose from 10 aspect ratios matching your target use case. Pick 1K for drafts, 2K for standard production, 4K for hero campaign visuals or print. Remember: 4K doubles the credit cost.
- 3
Step 3
Write a specific prompt — include text content if needed
Describe subject, style, lighting, and any text that should appear in the image. Nano Banana Pro's text rendering means you can specify exact wording in headlines, signs, or captions and trust it to render legibly. For multi-image workflows, attach reference images.
- 4
Step 4
Generate, review, refine
Generated images go to your asset library with SynthID watermarking embedded. Use Renas image tools (background removal, photo retouch) for post-edits without leaving the platform.
Pricing
Pricing on Renas AI
Pay-as-you-go credits, no API keys, no rate limits.
Frequently asked questions
Other Google models
Industry-leading text rendering + 4K AI images
Use Nano Banana Pro with your Renas AI subscription credits — no API key, no setup, no per-seat fees.
Try Nano Banana Pro