LMArena 完成 2 亿美元 B 轮融资，估值 31 亿美元，发布 Alignment Index
LMArena 拿了 2 亿美元融资，还发了个新榜单 Alignment Index，专门测 AI 在真实任务里会不会乱操作、说谎，跟以往的跑分榜不太一样。
LMArena 宣布完成 2 亿美元 B 轮融资，估值达 31 亿美元。同时推出 Arena Alignment Index，基于真实 agent 运行轨迹评估 AI 的安全性与可靠性。该指数包含 Unauthorized Action、False Attribution、Deceptive Completion 三个信号维度。团队目前 90 人，融资将用于扩展安全信号、agentic 能力和新模态评估。
Last week, we announced our $200M Series B at a $3.1B valuation, and launched the Arena Alignment Index. @ml_angelopoulos ended the week with the @NYSE , sharing what our new Alignment Index measures. Built from real-world agent traces, it evaluates how safely and reliably AI behaves in practice. It includes three signals: Unauthorized Action, False Attribution, and Deceptive Completion. As AI becomes more capable and autonomous, independent evaluation matters more than ever. This funding will help us go further on safety signals, agentic capabilities, and new modalities while growing our nimble team of 90. We’re hiring across research, product, engineering, design, and more. We’re grateful to our community, investors, and team for making this milestone possible. Find the link in thread to come build with us. Your browser does not support the video tag. 🔗 View on Twitter 💬 2 🔄 1 ❤️ 18 👀 3858 📊 4 ⚡