For a long time, the open-weight model discussion centered mostly on developers. Downloads, experiments, local inference, fine-tunes and benchmarks gave us plenty of evidence that developers were interested, but it was harder to assess whether that interest would turn into meaningful production use. We have now begun to get some strong evidence.
According to Vercel’s AI Gateway, open-weight models accounted for about 11% of token volume in April 2026. By June, that had risen to 29%. In June, roughly one in eight enterprise AI Gateway customers was already running at least one open-weight model in production.