MacGPT
The cheapest way to stop alt-tabbing to a browser tab: a hotkey, a menu bar icon, and an inline mode that answers inside the text field you are already in. It costs nothing and you bring your own OpenAI key. It is also a 2023 indie utility that has since been renamed on Gumroad, so treat it as a working tool rather than a supported product.
Pros
- Menu bar, global hotkey and inline text-field modes
- Works either through the ChatGPT web session or your own OpenAI API key
- Listed at zero cost on Gumroad, so no subscription of its own
- Free iOS companion app, GeePeeTee
- Named indie developer with a public press kit and privacy policy
Cons
- Site copyright still reads 2023 and shows no sign of active development
- The Gumroad product has been renamed MenuGPT, so branding no longer matches the site
- API mode means you pay OpenAI separately for every token
- No support commitment of any kind