I agree with this. Interestingly, I’ve been using Deepseek v4 Flash a lot these days but I definitely have to constrain it a lot with tests. Fortunately, I can have it write the tests. It’s extremely cost effective. Still trying to figure out whether the latest update last week that made it smarter actually translates into something I can see in the output. It’s not dumber, but it’s still an open question as to whether it’s “real world smarter.”