Nano Banana is an online AI image generation and photo-editing platform that leverages Google’s Gemini image models (Gemini 2.5 Flash Image and Gemini 3 Pro Image) to create and edit images via natural-language prompts. It supports text-to-image and image-to-image workflows, prompt-based local edits, multi-image fusion, and preserves character identity across edits. Users can produce high-resolution outputs up to 4K, select model quality levels (Nano Banana or Nano Banana Pro), and manage usage through credits, subscriptions, or one-time credit packs for flexible workflows.