In this episode of No Priors, Ben Mann, a co-founder of Anthropic and former early engineer at OpenAI, discusses the Claude 4 release and Anthropic's approach to AI model development, safety, and deployment. Mann explains the art behind version releases, highlighting improvements in coding capabilities, agentic tasks, and tool use, while also addressing the challenges of reward hacking. The conversation explores the potential for AI in coding, data analysis, and research, including the concept of recursive self-improvement and the timeline for achieving superhuman AI. Mann also delves into Anthropic's focus on AI safety, discussing the Responsible Scaling Policy and the use of Reinforcement Learning From AI Feedback (RLAIF) and Constitutional AI. The episode concludes with a discussion on the Model Context Protocol (MCP) and Anthropic's vision for fostering an open ecosystem for AI model integration.