Nano Banana Antigravity (Gemini 3 Pro Image via OAuth) Generate images using Nano Banana Pro (Gemini 3 Pro Image) via your existing Google Antigravity OAuth credentials. No separate API key needed! Uses the same OAuth tokens as your OpenClaw Antigravity provider. Generate Image Generate with Options Edit/Composite Images Multi-image Composition Options - (required): Image description or edit instructions - (required): Output filename - : Input image(s) for editing (can be repeated) - : 1:1 (default), 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9 - : 1K (default), 2K, 4K Authentication Uses e…