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Nano Banana 2 Lite
Use nano-banana-2-lite for a single 1K result. This fixed-price route uses the Lite Ext engine and disables the variable token-billed official fallback. It does not substitute another model when the selected channel is unavailable. A request accepts up to 7,000 prompt characters, up to fourteen public image references and n: 1. Resolution is 1K only. size can be auto, 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 5:4, 4:5 or 21:9.
For image editing, add image_urls, such as ["https://your-cdn.example/reference.png"]. official_fallback: true is rejected. Send a unique Idempotency-Key and Prefer: respond-async, then poll the returned Task ID. The current launch price is $0.03 per image; confirm it with the live Catalog.