Gemini 3.1 Flash Image

Gemini 3.1 Flash Image (gemini-3.1-flash-image, Nano Banana 2) is Google's faster image model for interactive generation. It takes text and image input and returns an image. Standard paid rates: text and image input $0.50 per 1M tokens; text and thinking output $3 per 1M tokens; image output $60 per 1M tokens. A 1024×1024 image uses 1,120 tokens, about $0.067. Rough per-image equivalents are $0.045 at 0.5K, $0.101 at 2K, and $0.151 at 4K.