Vercel AI Gateway: open-weights hit 78.4% of tokens in one-day snapshot
Guillermo Rauch’s Sept 19 Vercel AI Gateway snapshot put open-weight models at 78.4% of token volume (closed at 21.6%), with Moonshot and DeepSeek high on spend that day. That is a single-day peak above Vercel’s August monthly figure of 56% open-weight tokens and ~14% of spend.