Nano Banana Pro (Gemini 3 Pro Image Preview)
google/gemini-3-pro-image-preview
Nano Banana Pro is Google’s most advanced image-generation and editing model, built on Gemini 3 Pro.
Key facts
- Input price
- $2.00 / 1M tokens
- Output price
- $12.00 / 1M tokens
- Context window
- 66K tokens
- Max output
- 33K tokens
- Accepts
- Text, Images
- Returns
- Text, Images
Example: 1,000 requests with 1,000 input and 500 output tokens each would cost about $8.00 (1M input tokens × $2.00 + 0.5M output tokens × $12.00). Estimate your own usage.
Prices are the provider’s own per-token rates with zero markup, from our price list as of Oct 18, 2026. If a call has extra provider charges (images, audio, web search, cached prompts), you pay the reported cost.
Call it from your code
curl https://api.tokenctr.com/v1/chat/completions \
-H "Authorization: Bearer $TOKENCENTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model": "google/gemini-3-pro-image-preview", "messages": [{"role": "user", "content": "Hello!"}]}'Works with any OpenAI-compatible SDK: set the base URL to https://api.tokenctr.com/v1. Quickstart
Benchmarks
Design Arena
| Category | Rank | Elo | Win rate |
|---|---|---|---|
| Models: Image editing | 3 | 1252 | 66% |
| Models: Graphic design | 5 | 1251 | 65.8% |
| Models: Image | 5 | 1244 | 62.1% |
| Models: Logo | 6 | 1240 | 61% |
Source: Artificial Analysis indexes and Design Arena results as published in OpenRouter’s model data, fetched Oct 15, 2026. Higher is better. Not measured by TokenCenter. See all rankings.