Generate a single image with Nano Banana (Gemini image models). Models: nano=fast/1K, flash=best all-around/up to 4K (default), pro=professional/4K/thinking/grounding. Use cases: illustrations, product photography, logos, posters, photorealistic scenes, stickers, mockups. Output format follows the file extension: .png (default) or .jpg (flash/pro only — nano always returns PNG). Set use_search to ground in real-time data (weather, news, scores). Returns interaction_id — pass it to edit_image to iterate. Prompt tip: describe subject + setting + lighting + camera/lens + mood in full sentences; narrative beats keyword soup.

Edit or iterate on an image with a follow-up prompt. Pass previous_interaction_id from a prior generate_image/edit_image call for conversational multi-turn editing (recommended way to iterate). Or pass reference_images from disk (up to 14) for: virtual try-on, product placement in scenes, combining/compositing images, style transfer, photo restoration, attribute replacement (colors/materials), 2D-to-3D mockups. Returns a new interaction_id for further iteration. Prompt tip: describe subject + setting + lighting + camera/lens + mood in full sentences; narrative beats keyword soup.

Generate interleaved text + images from one prompt: storyboards, comics, recipes with step photos, illustrated explainers, tutorials. Saves numbered images to a directory and returns the narrative as markdown with image paths inline.

Generate a set of style-consistent icons via multi-turn interactions — each icon chains off the previous to keep the same visual style. Files are named after each prompt (icon-shopping-cart.png). Use for app icon sets, UI glyphs, feature illustrations.

Generate an image from a public YouTube video URL (flash model only). Analyzes the video and generates an image from it — thumbnails, posters, infographics, key-moment art.