Open-Source AI Models Reach Record 78.4% of Token Volume on Vercel Gateway

Open-weight AI models have reached an unprecedented 78.4% of all token volume flowing through Vercel's AI Gateway, marking a historic inflection point in developer adoption and signaling a fundamental shift in how applications consume artificial intelligence. The surge, measured from June 21 to September 18, 2026, represents a dramatic acceleration from just 11% share four months earlier in April, demonstrating how rapidly the economics of AI inference are reshaping the market.