Beamcast

As browser AI assistants go, Beamcast is the kind that works on the page you already have open instead of pulling you into a separate chat window.

Beamcast is a browser extension that runs AI commands, including custom prompts, on any website using OpenAI and Gemini models.

You get a set of built-in commands and can write your own, which suits repeated jobs like rewriting text, explaining code or translating a passage.

Cloud sync keeps those commands available across your devices, so a command you build once does not need to be recreated on another machine.

Beamcast is free to start, but credits are needed to run AI commands once you pass the free tier.

Results depend on the OpenAI and Gemini models behind it, so quality follows what those providers deliver.

Because it lives in the browser, you need the extension installed and running.

That is a good fit if you want quick AI access without switching tabs, and a poor one if you would rather have a standalone app.