This report introduces new metrics of AI usage to provide a rich portrait of interactions with Claude in November 2025, just prior to the release of Opus 4.5.

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Anthropic's Economic Index report analyzes Claude AI usage patterns from November 2025, introducing five new "economic primitives" that measure task complexity, human/AI skills, use cases, autonomy levels, and success rates. The analysis reveals that Claude usage remains concentrated in coding tasks (24% of top 10 tasks), shows geographic variation strongly correlated with GDP per capita, and demonstrates faster adoption convergence across US states than historical technology diffusion patterns. Higher-complexity tasks yield greater time savings (12x speedup for college-level work vs 9x for high school-level) but lower success rates. The report finds that AI disproportionately handles higher-skilled tasks, potentially creating deskilling effects in some occupations while upskilling others, with productivity gains estimated at 1.0-1.8 percentage points annually when adjusted for task success rates.

Anthropic Economic Index report: economic primitives

Chapter 1: What has changed since our last report

Chapter 2: Introducing economic primitives

Chapter 3: How Claude is used varies by geography