Gemini 3.1 Flash 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 Flash and Nano Banana (Gemini 2.5 Flash Image).
Gemini 3.1 Flash
Gemini 3.1 Flash is Google's high-speed, cost-efficient multimodal model in the 3.1 generation, purpose-built for high-volume content synthesis, classification, and intelligent routing at scale. Featuring a 1-million-token context window, it can process large batches of documents, customer data, or multimedia content in a single inference pass, dramatically reducing pipeline complexity. At just $0.25/MTok for input, it is one of the most affordable routes to Google-caliber multimodal AI, making it an ideal backbone for production pipelines, data enrichment workflows, and high-frequency API integrations.
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 Flash | Nano Banana (Gemini 2.5 Flash Image) |
|---|---|---|
| Provider | ||
| Context Window | 1,000,000 tokens | 32,768 tokens |
| Agent Suitability | 86/100 | N/A |
| Time to First Token (TTFT) | 150 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 Flash
$0.25
Nano Banana (Gemini 2.5 Flash Image)
$0.30
Output Price per Million Tokens
Gemini 3.1 Flash
$1.50
Nano Banana (Gemini 2.5 Flash Image)
$2.50
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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 Flash Quirks & Gotchas
- ▸Most cost-effective Google model — ideal for high-volume pipelines
- ▸Context caching available via Vertex AI for repeated document processing
Nano Banana (Gemini 2.5 Flash Image) Quirks & Gotchas
No developer gotchas reported.