It's one of those marketing stunts where they take a dig at another company, then a year or so later find themselves doing the same thing.

Think of the Samsung headphone jack commercial.

Discussion:

Claude Is a Space to Think

https://news.ycombinator.com/item?id=46884883

Sam Altman responds to Anthropic's "Ads are coming to AI. But not to Claude" ads

https://news.ycombinator.com/item?id=46894151