Anthropic secures new London office space for 800 people, days after OpenAI started leasing its first London office; Anthropic currently has 200+ London staff (Kai Nicol-Schwarz/CNBC)

Kai Nicol-Schwarz / CNBC: Anthropic secures new London office space for 800 people, days after OpenAI started leasing its first London office; Anthropic currently has 200+ London staff — Anthropic said Thursday it's expanding its presence in London with new office space for 800 people, days after rival OpenAI unveiled plans …