I've been using grok 4.5 with grok build soon after it came out and dropped claude. primarily for personal code. It communicates better. While that might not sound like a big deal it is. It doesn't give me a wall of text, tells me what I need to know and I'll make the actual decisions. It is very quick as well which means the sessions are far more interactive, I'll be steering it more. I sometimes cross check with codex and sol, but the daily driver is grok for me.
I found it has improved my productivity and output over claude where it felt like claude was giving me work to do. furthermore with the recent claude watermarking thing, I'd rather use grok or openai.
If anyone is curious download grok cli and throw a couple of prompts at it. you'll be surprised.