Mozilla report: open-weight AI models now just four months behind the closed frontier
mark_k · x · 2026-09-20
A new Mozilla report finds open-weight AI models are now only about four months behind the closed frontier.
Key data points:
- Kimi K3 nearly matches Sol on Terminal-Bench
- GLM-5.2 approaches Claude Opus performance at less than one-fifth the cost
- Eight of the ten largest models on OpenRouter by token volume are now open-weight
Closed models still lead on the hardest tasks, but the gap has become surprisingly small.
Related event: Report: Open-Weight Models Now Just 4 Months Behind Closed Frontier(4 posts)→
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