Anthropic Economic Index report: Economic primitives

## Executive summary This Anthropic Economic Index report (Nov 2025 sample) analyzes one million Claude.ai conversations and one million first-party API records to introduce and validate five "economic primitives" that measure task complexity, human/AI skills, use case (work/coursework/personal), AI autonomy, and task success; it documents concentrated task usage (notably coding), geographic and within-US adoption patterns, tradeoffs between task complexity, speedup and reliability, and revised estimates of occupational exposure and aggregate productivity gains when accounting for success rates and task complementarity.