Anthropic and OpenAI's Calls to Slow AI Development Spook Customers, Redirect Venture Capital

Anthropic and OpenAI CEOs have rattled the AI industry with high-profile calls to deliberately slow the pace of frontier model development, citing security risks and alignment challenges—a move that is already making startup customers wary of their vendor strategies and potentially steering venture capital toward AI security and infrastructure startups. Anthropic CEO Dario Amodei published an essay on September 12, 2026, arguing that AI labs need to throttle capability improvements to give safety research time to catch up. OpenAI CEO Sam Altman agreed within hours, and other leaders including Elon Musk and Google DeepMind chair Demis Hassabis voiced support.