Gemini 3.1 Pro vs Nano Banana 2 (Gemini 3.1 Flash Image Preview)
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Gemini 3.1 Pro and Nano Banana 2 (Gemini 3.1 Flash Image Preview).
Gemini 3.1 Pro
Google's premiere multi-modal model featuring a massive 2 million token context window. Engineered for deep code analysis, video indexing, and long-context reasoning.
Nano Banana 2 (Gemini 3.1 Flash Image Preview)
Gemini 3.1 Flash Image Preview, a.k.a. "Nano Banana 2," is Google’s latest state of the art image generation and editing model, delivering Pro-level visual quality at Flash speed. It combines...
Technical Specifications
| Specification | Gemini 3.1 Pro | Nano Banana 2 (Gemini 3.1 Flash Image Preview) |
|---|---|---|
| Provider | ||
| Context Window | 2,000,000 tokens | 131,072 tokens |
| Agent Suitability | 93/100 | N/A |
| Time to First Token (TTFT) | 420 ms | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | stable | stable |
| API Available | Yes | Yes |
| Released Date | 2026-04-20 | 2026-02-26 |
API Pricing Comparison
Input Price per Million Tokens
Gemini 3.1 Pro
$2.00
Nano Banana 2 (Gemini 3.1 Flash Image Preview)
$0.50
Output Price per Million Tokens
Gemini 3.1 Pro
$12.00
Nano Banana 2 (Gemini 3.1 Flash Image Preview)
$3.00
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
Gemini 3.1 Pro Quirks & Gotchas
- ▸Best model for massive context — 2M token window is class-leading
- ▸Tool calling requires explicit schema definition in Google AI Studio
Nano Banana 2 (Gemini 3.1 Flash Image Preview) Quirks & Gotchas
No developer gotchas reported.