Agreed! OpenAI even bought TBPN [1], who many have equated to ESPN for business. I think that even if Karpathy didn't add any new ideas to Anthropic (unlikely), adding him to the team is an interesting message to give to the market

[1] https://openai.com/index/openai-acquires-tbpn/

Maybe he adds some semblance of stability? Anthropic probably is trying to sell it itself as the sane alternative to OpenAI with their IPO coming up choose us we are responsible.