Arena, the Berkeley-born startup behind one of the most widely watched crowdsourced AI model leaderboards, told TechCrunch it has reached $100 million in annualized run-rate revenue roughly eight months after launching its commercial evaluation product. The milestone suggests that AI benchmarking and post-training feedback are becoming a business in their own right, not just a research exercise, though the company says its revenue is consumption-based rather than contracted recurring ARR.