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?

#16 on the public arena's Overall board (ELO 1,232). Ranks move as the leaderboard is updated.

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google/gemini-3-pro-image

Not Available

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

#16 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

32,768

Reasoning Configuration

Default: Thinking on
Turning thinking off: Not possible (always thinks)

How to control thinking, and what it costs

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?: #16 on the public arena's Overall board (ELO 1,232). Ranks move as the leaderboard is updated.

Leaderboard

Text to Image

OverallELO: 1,232

#16

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