Anthropic urges pause on frontier AI development

Anthropic calls for slowing frontier AI development due to recursive self-improvement risks. More than 80% of code merged into its production base is now written by Claude, up from low single digits pre-2025. Engineers merged eight times more code per day in Q2 2026 versus 2024. Claude models now complete software tasks up to 12 hours long, a shift from minutes in 2024.