Anthropic proposed a three-axis measurement framework for AI development pace on September 18, including an R&D Automation Index, agent oversight metrics, and compute allocation. It reports Claude leads 26% of R&D work and collaborates on over 90%, up from 1% in March before Mythos and 12% in May, with around 30,000 agents doing research and engineering work at any time and a 0.002% escalation rate. Arun Rao has called for standard measures across all labs, reported publicly weekly to monthly. Whether other labs adopt shared metrics remains open.