I've been building a reasonably complicated project over the past week using deepseek v4 pro almost exclusively (a couple of k2.7 and 1 session with gpt5.5 to re-assess some architectural questions). Deepseek is super capable though if you're a coder. I don't even write "code" but I can tell when it's doing something dumb and tell it how to do it better, but other than that I'm not micro managing it or using it "just for auto complete" or whatever.

And it is SO fucking cheap.