Nano Banana 2 (Gemini 3.1 Flash Image) - Faster, lower-cost image generation & editing

Generate new images or edit existing ones using Nano Banana 2 (gemini-3.1-flash-image-preview), Google’s newer image family that targets faster iterative generation and stronger price/performance balance while staying in the same image-editing workflow.

Why Nano Banana 2 (Gemini 3.1 Flash Image)

• Newer release path: Gemini 3.1 Flash Image is documented as the 26 Feb 2026 Flash-image family release (vs. Nano Banana Pro’s 20 Nov 2025 release date for image preview).
• Faster iteration: Google docs position Gemini 3.1 Flash Image as optimized for image understanding/generation with a balance of price and performance.
• Cost focus: It is marketed for lower-cost, faster iterative image generation workflows compared with older Pro-first quality-first defaults.
• Strong baseline quality: It remains suitable for professional generation/editing and supports multi-image editing/multi-turn workflows in the same API flow.

Use this as the default for drafts and quick turns; use higher-cost variants when you need a specific quality edge on a non-time-critical final pass.

Usage

Run the script using absolute path (do NOT cd to skill directory first):