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)→
More from Models
- Datalab claims parsing accuracy second only to Gemini at 1/37 the cost and 6x speed — VikParuchuri · 2026-11-12
- Datalab fast-mode OCR beats Opus 5.5 and GPT-6.1 Sol at 1/4 to 1/68 the price — VikParuchuri · 2026-11-12
- Claude's world knowledge impresses: model guesses user identity from one prompt — adonis_singh · 2026-11-12
- Gemini 4 Carbon opens to all at $2/$10, price doubling to $4/$20 on Dec 1 — socialwithaayan · 2026-11-12
- Ten wild Gemini 4 Carbon demos in 24 hours: CUDA meadows, V8 engines, mech stomps — socialwithaayan · 2026-11-12
- How to cut Fable 5.2 token costs by 90%: Arc routing plus a lean CLAUDE.md — EXM7777 · 2026-11-12