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As a curious person, I started exploring Google Chrome's `LanguageModel` Prompt API that ships with Google Chrome Beta. I built a stupid harness that sends a system prompt and allows it to eval any JS code it wants. It was fun to play around until I asked what is my user agent...

6/5/26, 7:38 pm0 reposts4 likes

Wes Souza

@wes.dev

6 May

I wanted it to query navigator.userAgent and read it back to me. Something VERY ODD happened. It did a broken tool call, sent the navigator.userAgent as a generic code and then...

Wes Souza

@wes.dev

6 May

And then I asked "what model are you based on?" It said > I am based on the GPT-3.5 architecture. Funny.

Wes Souza

@wes.dev

7 May

It is kinda sad sometimes, I asked it to "add a chat box ui" and it spiralled failing to produce proper JavaScript DOM manipulations and ended up extremely ashamed.