Gemini 3.1 Pro Preview Custom Tools vs Nano Banana 2 Lite (Gemini 3.1 Flash Lite 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 Preview Custom Tools and Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image).
Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools is a variant of Gemini 3.1 Pro that improves tool selection behavior by preventing overuse of a general bash tool when more efficient third-party...
Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)
Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is Google's fastest, most cost-efficient Gemini image model, built for high-velocity developer pipelines and rapid-fire visual exploration. It delivers text-to-image generation...
Technical Specifications
| Specification | Gemini 3.1 Pro Preview Custom Tools | Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) |
|---|---|---|
| Provider | ||
| Context Window | 1,048,756 tokens | 65,536 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | beta | stable |
| API Available | Yes | Yes |
| Released Date | 2026-02-25 | 2026-06-30 |
API Pricing Comparison
Input Price per Million Tokens
Gemini 3.1 Pro Preview Custom Tools
$2.00
Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)
$0.25
Output Price per Million Tokens
Gemini 3.1 Pro Preview Custom Tools
$12.00
Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)
$1.50
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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 Preview Custom Tools Quirks & Gotchas
No developer gotchas reported.
Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) Quirks & Gotchas
No developer gotchas reported.