Codeium is free and it lives in VS Code, here is what it actually does

I was skeptical when someone told me there was a free AI coding assistant as good as the paid ones. Spent a few weeks with Codeium in VS Code and here is what I found.

The core pitch is that it is like having ChatGPT built into your editor. There is a chat panel on the side where you can ask questions about your code without switching to a browser. You can highlight a function, ask it to explain what it does, and get a plain English breakdown. For jumping into unfamiliar codebases that alone saves a lot of time.

The code modification flow works like this: select the code you want to change, hit Ctrl+I, type what you want done. "Clean up this code," "add error handling," "convert this to async," whatever. It shows you the proposed changes with green for additions and red for removals. You accept or reject. It does not always get it perfect so you need to read what it suggests, but it gets you most of the way there quickly.

The autocomplete is context-aware in a way that impressed me. It reads your whole script, not just the line you are on. So it knows about variables you defined 200 lines ago and will suggest them. If you name a variable something like listOf10TeamNames it will actually generate appropriate placeholder content for it. Small thing but it shows the context awareness is real.

Automated commenting is useful for documentation work. Ask it to describe a function in a single line and it inserts the comment for you.

The free tier is genuinely full-featured, not a crippled trial. Worth installing just to try it.