While you can't easily set ChatGPT Search as a default search engine in most browsers (which you maybe shouldn't do, anyway), you can still create shortcuts to quickly and easily search anything ...

Find out how to replace Google with ChatGPT search as the default search engine in Chrome, Edge and other web browsers.

But you can also set ChatGPT as the default search engine in your browser, so you receive ChatGPT's response to your query instead of Google search results.

Set ChatGPT as the default search engine in Chrome and Edge ChatGPT has a search extension that you can install on Chrome and Edge or other similar Chromium-based browsers.