In terms of using experience, I found Grok 4.5 to be way more pleasant to use than GPT 5.6 Sol and Claude 4.8/5. It just gets to the point, and is super fast and concise, no yapping. That's how AI agents should be imo. None of the weird "Claude ipsum" jargon like "load-bearing" and "stale folklore" or GPT 5.6-isms like "focused regression" and "provenance".
I’m not doing any coding with AI, so I’m the odd one out. Mostly use it for research: information retrieval and grokking technical concepts for exam prep. Does that fall within “knowledge work”?
Anywho - I switched to Opus last week and felt torn. It’s displayed somewhat higher competency in some responses, and the artifacts (diagrams) are splendid, but I despise its writing style. Grok is indeed fact/truth oriented, direct, and less personable (which I vastly prefer). Maybe I’ll switch back to Grok.