Alex Cohen said 90% of his AI usage is with Claude. Bloomberg via Getty Images/Alex Cohen Alex Cohen, CEO of Xander Marketing, switched to primarily using Claude over ChatGPT for work. He said Claude challenges him more, but he keeps ChatGPT as a backup due to Claude's outages. ChatGPT's parent company, OpenAI, has missed revenue and user growth goals, according to reports. This as-told-to essay is based on a conversation with Alex Cohen, a 42-year-old CEO and founder of Xander Marketing, based in Kent, UK. This story has been edited for length and clarity. I started using ChatGPT in December 2022. When I tried Claude about 10 months later, it was mostly out of curiosity. Even early on, there was a clear difference. Claude has always been a better writer, in my opinion. I run a small marketing firm , and we write a lot of content for brands. When I gave both systems the same prompt with context, Claude got it closer to what I envisioned the first time. That started to change how we work.…