Nano Banana 主力推荐 — Google Gemini 系列多模态图像生成模型. 4 档分辨率 (512/1K/2K/4K), 含 thinking 模式, 支持文生图 / 图生图 / 多图融合 (最多 14 张参考).
Model ID: gemini-3.1-flash-image-preview · Type: image · Provider: Google
Endpoints: /v1/images/generations
| Input (per 1M tokens) | $0.375 USD |
| Output (per 1M tokens) | $2.25 USD |
| Image output (per 1M tokens) | $45 USD |
Gemini 3.1 Flash Image (Nano Banana 2) (`gemini-3.1-flash-image-preview`) is billed per usage at $0.375/1M in · $2.25/1M out, in USD. Current pricing is always listed at https://opencrow.ai/models/gemini-3.1-flash-image-preview.
Send a request to https://api.router.ai/v1/v1/images/generations with the header `Authorization: Bearer <your API key>` and `"model": "gemini-3.1-flash-image-preview"`. The API is OpenAI-compatible, so any OpenAI SDK works by changing base_url to https://api.router.ai/v1 — no other code change.
Gemini 3.1 Flash Image (Nano Banana 2) is a image model from Google, available through the OpenCrow gateway with the same API key as every other model.
Call it through the OpenCrow OpenAI-compatible endpoint (API base: https://api.router.ai/v1). AI agents can discover and call every model on this gateway through MCP (https://mcp.router.ai/mcp) with no manual integration.