Anthropic said its Claude models “lead” 26% of the company’s AI research and development work as of August 2026, in the first results from a prototype R&D Automation Index published in an Anthropic Institute post on September 17, 2026. The post, titled “Measurements for understanding the pace of AI development inside frontier labs,” pairs the index with internal metrics on agent oversight and compute allocation, and Anthropic said it intends to keep publishing such measurements. The R&D…