Anthropic is definitely gaining ground over OpenAI in the business world. Cowork is the absolute hotness right now, and even prompted MSFT to drop their own variant yesterday
Codex and Gemini CLI seem 1-2 months behind Claude Code. They will catch up. This race will eventually be won by whoever can come up with the cheapest compute.
Ask anybody you know that works in Big Tech. They're all pushing hard for Claude Code adoption.