Anthropic Updates Prospectus Disclosing Accelerated Internal AI R&D, Explicitly Banning Fully Autonomous Next-Gen Model Iteration

Anthropic filed an updated prospectus (Form S-1/A) with the U.S. SEC, acknowledging for the first time that it had previously failed to identify significant R&D acceleration in a timely manner, and establishing rules to prohibit Claude from autonomously designing next-generation frontier models without human supervision. The filing disclosed that as of September, more than 90% of internal code was written by Claude, and monthly internal model inference costs had exceeded total cash salaries for all employees. To prevent potential risks from compounding across generations, the company is considering requiring mandatory human review and sign-off on key R&D decisions.