Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows.
function_calling| Model | Context | Max out | Pricing |
|---|---|---|---|
| Google: Gemini 3.1 Flash Lite (batch) | 1.0M | 66K | $0.13$0.75 |
| Google: Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) | 66K | 59K | $0.25$1.5 |
| Google: Gemini 3.1 Flash Lite Preview | 1.0M | 66K | $0.25$1.5 |
| Google: Gemini 3.1 Flash Lite | 1.0M | 66K | $0.25$1.5 |
| Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) | 66K | 59K | $0.5$3 |
| Google: Nano Banana 2 (Gemini 3.1 Flash Image) | 131K | 33K | $0.5$3 |
| Google: Gemini 3.1 Pro Preview (batch) | 1.0M | 66K | $1$6 |
| Google: Gemini 3.1 Pro Preview Custom Tools | 1.0M | 66K | $2$12 |
| Google: Gemini 3.1 Pro Preview | 1.0M | 66K | $2$12 |
/v1/models/openrouter/google/gemini-3.1-pro-previewGemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows.