Gemini-3.1-flash-image (codename Nano Banana 2) is Google’s official lightweight image generation/editing model released in May 2026. Built on the Gemini 3.1 Flash architecture, it prioritizes ultra-fast response and cost efficiency, supporting up to 4K resolution, accurate text rendering, and conversational multi-turn editing. It is ideal for high-volume use cases like bulk content creation, marketing assets, and creative prototyping.