Google’s image generation ecosystem in 2026 is more powerful — and more confusing — than ever. Between the Nano Banana models (Gemini’s native image generation), Imagen 4 (the standalone image model), and legacy options, choosing the right model for your budget requires a clear pricing map.
🧮 Calculate your exact multimodal costs: Use our AI API Pricing Calculator to estimate image, text, audio, and video costs across all major providers instantly.
What is “Nano Banana”?
If you’ve seen the banana emoji next to some Gemini models in Google AI Studio, you’ve found the Nano Banana family. These are Gemini’s native image generation models — they can understand text, reason about it, AND generate images natively in one model.
There are two main variants:
| Model | Powered By | Model ID | Best For |
|---|---|---|---|
| Nano Banana 2 | Gemini 3.1 Flash Image | gemini-3.1-flash-image-preview |
Fast, affordable native image generation |
| Nano Banana Pro | Gemini 3 Pro Image | gemini-3-pro-image-preview |
High-fidelity, professional-grade output |
Nano Banana 2 (Gemini 3.1 Flash Image) Pricing
Image output is priced at $60.00 per million output tokens. Since different resolutions use different token counts, the per-image price varies:
| Resolution | Pixels | Tokens Used | Price per Image | Batch API (50% Off) |
|---|---|---|---|---|
| 0.5K | 512×512 | 747 | $0.045 | $0.022 |
| 1K | 1024×1024 | 1,120 | $0.067 | $0.034 |
| 2K | 2048×2048 | 1,680 | $0.101 | $0.050 |
| 4K | 4096×4096 | 2,520 | $0.151 | $0.076 |
Cost comparison: At $0.067 per 1K image, Nano Banana 2 is 3x cheaper than Nano Banana Pro. Use it for social media content, thumbnail mockups, and rapid prototyping.
Free Tier in AI Studio
Nano Banana 2 is available in the free tier of Google AI Studio with standard rate limits — perfect for testing before committing to paid usage.
Nano Banana Pro (Gemini 3 Pro Image) Pricing
Image output is priced at $120.00 per million output tokens — 2× the cost of Nano Banana 2, but with significantly higher quality and adherence to complex text prompts.
| Resolution | Pixels | Tokens Used | Price per Image | Batch API (50% Off) |
|---|---|---|---|---|
| 1K | 1024×1024 | 1,120 | $0.134 | $0.067 |
| 2K | 2048×2048 | 1,120 | $0.134 | $0.067 |
| 4K | 4096×4096 | 2,000 | $0.240 | $0.120 |
When to use Pro: Marketing campaigns, hero images, product photography, or any case where visual quality directly impacts conversions.
Imagen 4 Pricing — The Standalone Powerhouse
Imagen 4 is Google’s dedicated image generation model — separate from Gemini. It’s optimized for the highest quality output, excellent text rendering, and photorealism.
| Model Tier | Model ID | Price per Image | Best For |
|---|---|---|---|
| Imagen 4 Fast | imagen-4.0-fast-generate-001 |
$0.02 | High-volume generation, drafts, social mockups |
| Imagen 4 Standard | imagen-4.0-generate-001 |
$0.04 | Balanced quality and cost |
| Imagen 4 Ultra | imagen-4.0-ultra-generate-001 |
$0.06 | Hero images, commercial-grade photography |
Additional Imagen 4 Costs
- Image Editing (Inpainting): ~$0.02 per edit
- Upscaling: ~$0.06 per image
Best deal alert: Imagen 4 Fast at $0.02/image is the cheapest high-quality image generation API on the market. It is 3x cheaper than DALL-E 3 and Midjourney API options.
Nano Banana vs. Imagen 4: Comparison Matrix
| Feature | Nano Banana 2 | Nano Banana Pro | Imagen 4 Fast | Imagen 4 Ultra |
|---|---|---|---|---|
| Price (1K image) | $0.067 | $0.134 | $0.020 | $0.060 |
| Text rendering | Good | Better | Best | Best |
| Multimodal I/O | Native | Native | Image only | Image only |
| Editing/Inpainting | Native | Native | Dedicated API | Dedicated API |
| Free tier | Yes | Limited | Paid only | Paid only |
Real-World Cost Comparison
Scenario: Generate 10,000 marketing images at 1K resolution:
| Model | Total Cost | Time / Speed |
|---|---|---|
| Imagen 4 Fast | $200.00 | Ultra-Fast |
| Imagen 4 Ultra | $600.00 | Fast |
| Nano Banana 2 | $670.00 | Fast |
| Nano Banana Pro | $1,340.00 | Moderate |
| Nano Banana 2 (Batch) | $335.00 | 24-hour turnaround |
Key Takeaways
- Imagen 4 Fast ($0.02/image) is the cheapest option for pure image generation.
- Nano Banana 2 is the best choice when you need text understanding + image output in one model.
- Nano Banana Pro delivers the highest quality but at 2× the cost.
- Batch API saves 50% on Nano Banana models — use it for non-urgent workloads.
Related Guides
- 📘 Google Gemini API Pricing Guide
- 📗 OpenAI API Pricing Guide
- 📊 AI Model Comparison 2026
- 🧮 AI API Pricing Calculator
Prices are current as of May 2026. Always verify with Google’s official documentation before production deployment.
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