Missing from here is the marketing position. Claude _very_ rapidly gained traction in the business/enterprise space earlier this year with Claude Cowork leading that drive. So successful it was, it lead to Microsoft licensing the Claude Cowork IP and white labelling it as Copilot Cowork (has anything like that ever happened before?!). ChatGPT Work was, imo, largely driven by a panic at OpenAI that they were haemorrhaging market intrigue and LinkedIn zeitgeist and headspace to Anthropic. ChatGPT had been the de facto, almost the Generic Trademark in business, and they got comfortable. Claude Cowork was eating their lunch. The way Anthropic targeted finance teams, legal teams, sales teams, with their positioning was absolute product marketing genius.
ChatGPT Work is trying to reclaim some of that magic that Claude Cowork affords its users that is so hard to explain succinctly.