# Where is Physical RSI capability from? An Observational Scaling Law of LLM-as-policy > Source: > Published: 2026-10-20 08:00:02+00:00 In this paper, we systematically investigate the mechanisms, scaling behavior, and generalization of physical Recursive self-improvement. We introduce PhysRSI-eval to quantify physical RSI through a five-axis metric: First-Attempt Performance, Efficiency, Success, Budget and Improvement from failure