Gemini 3.1 Pro vs Nano Banana (Gemini 2.5 Flash Image)
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 (Gemini 2.5 Flash Image).
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 (Gemini 2.5 Flash Image)
Gemini 2.5 Flash Image, a.k.a. "Nano Banana," is now generally available. It is a state of the art image generation model with contextual understanding. It is capable of image generation,...
Technical Specifications
| Specification | Gemini 3.1 Pro | Nano Banana (Gemini 2.5 Flash Image) |
|---|---|---|
| Provider | ||
| Context Window | 2,000,000 tokens | 32,768 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 | 2025-10-07 |
API Pricing Comparison
Input Price per Million Tokens
Gemini 3.1 Pro
$2.00
Nano Banana (Gemini 2.5 Flash Image)
$0.30
Output Price per Million Tokens
Gemini 3.1 Pro
$12.00
Nano Banana (Gemini 2.5 Flash Image)
$2.50
Want to test both models live?
Run side-by-side prompt prompts in our dynamic Sandbox. Check execution speeds, latency metrics, and compute actual costs in real-time.
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 (Gemini 2.5 Flash Image) Quirks & Gotchas
No developer gotchas reported.