Overview
- Tool name: Nano Banana Pro (Gemini 3 Pro Image)
- Developer: Google DeepMind
- Official announcement: https://blog.google/technology/ai/nano-banana-pro/
- Official pricing page: https://cloud.google.com/vertex-ai/generative-ai/pricing
- Category: AI image models
Nano Banana Pro is Google DeepMind's flagship image generation and editing model built on Gemini 3 Pro, and the high-fidelity successor to Nano Banana (Gemini 2.5 Flash Image). Google's positioning is specific: use Gemini's reasoning and real-world knowledge to make *information visualization* actually usable - not just produce attractive pictures.
Core capabilities:
- Up to 4K output (2K and 4K) across multiple aspect ratios, positioned for social and print-ready assets
- In-image text rendering: Google calls it the best model for correctly rendered, legible text, from short taglines to long paragraphs, in multiple languages; it can also translate text already inside an image while leaving everything else untouched
- Google Search grounding: draws on the search knowledge base for recipe diagrams, live weather, sports and other fact-sensitive visuals
- Up to 14 reference images (per the Google Cloud enterprise announcement), letting you load logos, color palettes, character turnarounds and product shots at once, with consistency for up to five people or characters
- Granular creative control: localized transformations, camera angle, aspect ratio, lighting, focus, color grading, day-to-night conversion
- SynthID watermarking on every generated asset, verifiable in the Gemini app; copyright indemnification at general availability
API pricing (official Vertex AI pricing page, global region, standard on-demand)
- Text / image input: $2.00 per million tokens
- Cached input: $0.20 per million tokens
- Text output (answers and reasoning): $12.00 per million tokens
- Image output: $120.00 per million tokens
- Per generated image: 1K and 2K both consume 1120 output tokens = $0.134 per image; 4K consumes 2000 output tokens = $0.24 per image
- Input images are billed at 560 tokens each (about $0.00112 per image at standard rates)
- Flex / Batch is 50% off: roughly $0.067 at 1K/2K and $0.12 at 4K
- Priority tier is 1.8x standard
Pricing verified against the official Vertex AI pricing page at cloud.google.com (October 2026). There is no free API quota for this model; the Gemini app's free tier includes a limited number of generations before falling back to the 2.5 Flash Image version.
Same-family comparison (same official pricing page)
| Model | Input / 1M tokens | Image output / 1M tokens | Per image (1K / 2K / 4K) |
|---|---|---|---|
| Nano Banana Pro (gemini-3-pro-image) | $2.00 | $120 | $0.134 / $0.134 / $0.24 |
| Nano Banana 2 (gemini-3.1-flash-image) | $0.50 | $60 | 0.5K $0.045 / 1K $0.067 / 2K $0.101 / 4K $0.15 |
| Nano Banana 2 Lite (gemini-3.1-flash-lite-image) | $0.25 | $30 | 1K $0.034 |
Google's own guidance: start with Nano Banana for high-velocity ideation, then move to Nano Banana Pro when you need the highest fidelity for production-ready assets.
Who it is for
- Infographics and diagrams: turn data, notes and processes into deliverable visuals
- Multilingual localized assets: swap the language on a poster while keeping type style and placement
- Commercial work with strict brand consistency: 14 references plus character consistency
- Visuals that need real-world facts: maps, technical diagrams, training-manual illustrations
- Teams already in the Google ecosystem: available in the Gemini app, Google Ads, Workspace, NotebookLM and Vertex AI
Limitations
- Closed source, no weights, no self-hosting
- Token-based billing is more expensive at batch volumes than open-weight tiers such as FLUX 3 Klein (from $0.009 per image), though Flex/Batch halves it
- Published comparisons are Google's own (on Ideogram 4.5's official page, Nano Banana Pro appears as one of the comparison targets)
- Free-tier allowance is limited and falls back to a different model version
Frequently asked questions
What model is Nano Banana Pro?
Google DeepMind's Gemini 3 Pro Image - the high-fidelity successor to Nano Banana (Gemini 2.5 Flash Image), described by Google as its state-of-the-art image generation and editing model.
How much per image?
Official pricing: $0.134 per image at both 1K and 2K, and $0.24 at 4K; Flex/Batch halves that to roughly $0.067 and $0.12.
How many reference images can I use?
The Google Cloud enterprise announcement states up to 14 input images, maintaining consistency for up to five people or characters.
Nano Banana Pro or Nano Banana 2?
Pro for maximum fidelity and complex typography; Nano Banana 2 for cheap, fast iteration ($0.067 per 1K image). Google recommends pairing them across a workflow.
Does it handle multilingual text?
Yes - it is a headline capability. It renders text in multiple languages and can translate text already inside an image while leaving the remaining pixels unchanged.
*This page is not affiliated with Google. Pricing verified as of October 2026 (official cloud.google.com pricing page); confirm current figures on the official site.*