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Nano Banana Pro (Gemini 3 Pro Image)
Nano Banana Pro is Google’s most advanced image-generation and editing model, built on Gemini 3 Pro. It extends the original Nano Banana with significantly improved multimodal reasoning, real-world grounding, and...
6/18/2026
131,072 tokens
#18 Text to Image (Overall)
Specifications
Modalities
Input
image
text
Output
image
text
Supported Parameters
include_reasoning
max_tokens
reasoning
response_format
seed
stop
structured_outputs
temperature
tool_choice
tools
top_p
Max Output Tokens
32,768Reasoning Configuration
- Default
- Thinking on
- Turning thinking off
- Not possible (always thinks)
Data policy
- Prompt retention
- Unknown — we could not confirm
- Training
- Unknown — not declared
"Unknown" does not mean "safe". It means we could not confirm it.
Whether a provider trains on prompts is a declared value from our terms with them. Retention is determined from the upstream listing for every host this model can reach. Neither is guessed.
Frequently asked questions
- Is Nano Banana Pro (Gemini 3 Pro Image) available on FastMetal?
- Not at the moment. GLM 5.3 Flash, from the same lab, is available on the FastMetal API today.
- What is the context window of Nano Banana Pro (Gemini 3 Pro Image)?
- 131,072 tokens, shared between the prompt and the response.
- How does Nano Banana Pro (Gemini 3 Pro Image) rank?
- #18 on the public arena's Overall board (ELO 1,234). Ranks move as the leaderboard is updated.
Leaderboard
Text to Image
OverallELO: 1,234
#18Rankings: LMArena leaderboard dataset (lmarena-ai/leaderboard-dataset), CC BY 4.0, snapshot 2026-10-07; category names mapped and ratings rounded by FastMetal.