Nano Banana (Original)
Underlying model
Gemini 2.5 Flash Image
Speed
Fast (a few seconds)
Max resolution
~1K (1 megapixel)
Text rendering
Basic
Thinking step
No
Prompt adherence
Basic
Status
Replaced by Nano Banana 2
Nano Banana Pro
Underlying model
Gemini 3 Pro Image
Speed
Slow (20s to 60s+)
Max resolution
Up to 4K (4096x4096)
Text rendering
Excellent
Thinking step
Yes (mandatory)
Prompt adherence
Strong
Status
Available via regenerate menu
Nano Banana 2
Underlying model
Gemini 3.1 Flash Image
Speed
Very fast (under 3 seconds)
Max resolution
512px to 4K (4096x4096)
Text rendering
Excellent
Thinking step
Configurable (Minimal/High/Dynamic)
Prompt adherence
Strong
Status
Default model everywhere
0 sec
Generation time (under)
0%
Latency reduction vs Pro
0+ countries
Available in Google Search
What are thinking levels?
When generating images, the AI can spend extra time reasoning about composition, text placement, and prompt details before creating the image. Minimal thinking is the fastest (default for Nano Banana 2). High thinking produces better results for complex prompts but takes longer. Dynamic lets the model decide how much reasoning each prompt needs. Most users will never need to change this; it is mainly useful for developers fine tuning the API.