In my sphere of colleagues, it seems like at least 90% are using Claude exclusively and the remaining 10% are using some amount of Codex. Granted, my work only pays for Claude, but even so, nobody is talking favorably about Grok or begging our work to pay for it.
In my private life, the only people I know using Grok for non-work items are, frankly, conservatives who took the Elon pill. They see it as more truthful than ChatGPT. But they're pretty much using it for answers and not to produce anything.