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Differences Between the Three Nano Banana Image Models

Differences Between the Three Nano Banana Image Models

Google’s guide compares three Nano Banana image models: the original Nano Banana, Nano Banana 2 (Gemini 3.1 Flash Image), and Nano Banana Pro. Choosing the right one helps you write better nanobanana prompts and pick the right nanobanana entry for nanobanana2.

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Three Nano Banana models

Summary table

ModelRoleNotes
Nano Banana (v1)Fastest, lowest costLegacy choice; Google suggests new projects default to NB2
Nano Banana 2Default for most work~95% of Pro capability at much lower price; Flash speed + strong quality
Nano Banana ProFlagshipBest image quality; use for the hardest multi-layer prompts

Nano Banana 2 highlights

  • Image grounding: Can use web search to ground real-world objects (landmarks, species); not for people’s likeness.
  • Resolutions: 512px through 4K; extreme ratios like 1:8 and 1:4 for banners and scroll layouts.
  • Batch workflow: Generate many 512px variants cheaply, then upscale winners to 1K–4K.

Thinking mode

Google suggests leaving “thinking” off for normal generation; turn on only for nonsense outputs, very complex diagrams, or deep grounding + spatial reasoning.

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