Is Nano Banana (Gemini 2.5 Flash 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 (Gemini 2.5 Flash Image)?

32,768 tokens, shared between the prompt and the response.

google/gemini-2-5-flash-image

Not Available

Nano Banana (Gemini 2.5 Flash Image)

Gemini 2.5 Flash Image, a.k.a. "Nano Banana," is now generally available. It is a state of the art image generation model with contextual understanding. It is capable of image generation, edits, and multi-turn conversations. Aspect ratios can be controlled with the [image_config API Parameter](https://openrouter.ai/docs/features/multimodal/image-generation#image-aspect-ratio-configuration)

10/7/2025

32,768 tokens

Specifications

Modalities

Input

image

text

Output

image

text

Supported Parameters

max_tokens

response_format

seed

stop

structured_outputs

temperature

top_p

Max Output Tokens

32,768

Frequently asked questions

Is Nano Banana (Gemini 2.5 Flash 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 (Gemini 2.5 Flash Image)?: 32,768 tokens, shared between the prompt and the response.

Models you can use on FastMetal