Re: [chrome-ai-dev-preview-discuss] How to get context window size & other model properties

[Kenji Baheux]

Hi Colin,

The API has changed and it looks like various AI models have yet to catch up on the latest version.

See this article for the latest. 

It should be possible to tell your AI model to refer to this article either by URL, or by copy pasting its content.

On Sat, Dec 27, 2025 at 6:37 AM Colin Mummery <colin....@gmail.com> wrote:

I have Nano working consistently well in my SPA using the Prompt and Rewriter APIs. What seems to have changed is the capabilities function which doesn't seem to exist anymore, even Gemini 3.0 seems to have no clue how to find out the properties and values that the capabilities function used to return. Is there still a way to do this or are these properties now hidden? Some example code is always welcome.

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Kenji BAHEUX (my how-to)

Product Manager - Chrome

Google Japan

[Sumeet Singh]

Hi Kenji,

Thanks for sharing the article! I'll take a look. Does the new documentation explicitly cover how to check for model properties like the context window size?

Thanks,
Sumeet 

To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/chrome-ai-dev-preview-discuss/CADWWn7Uk9Wxx74Rr-APnAuwcPo1uDTZkTXXS%2B6eQS_4zUbb8Kg%40mail.gmail.com.

[Kenji Baheux]

Hi Sumeet,

Yes it's covered and there is a link for further details on session management.