开源快追上闭源了，WebDev 差距只剩 10 分，Muse Spark 1.2 还要放权重。
Arena.ai 在 Code Arena: WebDev 上公布，闭源与开源模型的前沿分差已从 2025 年底的约 150 分压缩到约 10 分。在 Code Arena: Frontend 赛道，闭源领先优势曾扩大约 100 分，2026 年春季后收窄至约 40 分。开源阵营中，Muse Spark 1.2 预计将发布权重，Glimmer 也被视为影响排名的重要模型。官方完整分数会在 Arena.ai 放出。
The performance gap between proprietary and open source models has reached its narrowest point yet. ...
The performance gap between proprietary and open source models has reached its narrowest point yet. In Code Arena: WebDev, the frontier gap between proprietary and open has compressed from ~150 pts since late 2025, to just ~10 pts today. Muse Spark 1.2 is expected to release their weights. Stay tuned to see how that and other open models like Glimmer impact the frontier. Official scores coming soon. Arena.ai @arena Code Arena: Frontend is a tighter race. The history is shorter, and the gap has moved faster: the proprietary lead rose +100 points, then compressed sharply through spring 2026. Today, the lead is around +40 points. 🔗 View Quoted Tweet 💬 8 🔄 16 ❤️ 160 👀 13294 📊 23 ⚡