Is Nano Banana 2.1 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 2.1?

65,536 tokens, shared between the prompt and the response.

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Google

google/gemini-nano-banana-2-1

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Nano Banana 2.1

Nano Banana 2.1 (Gemini Nano Banana 2.1) is Google's image generation and editing model on the Flash tier, succeeding Nano Banana 2 and Nano Banana Pro. It improves product recontextualization,...

10/6/2026

65,536 tokens

Specifications

Modalities

Input

image

text

Output

image

text

Supported Parameters

include_reasoning

max_tokens

reasoning

reasoning_effort

response_format

seed

structured_outputs

temperature

tool_choice

tools

top_p

Max Output Tokens

58,982

Reasoning Configuration

Default: Thinking on (effort: minimal)
Selectable effort levels: high
minimal
Turning thinking off: Possible (reasoning.enabled: false)

How to control thinking, and what it costs

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 2.1 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 2.1?: 65,536 tokens, shared between the prompt and the response.

Models you can use on FastMetal