Arena 完成 2 亿美元 B 轮融资并发布 Alignment Index
Arena 宣布完成 B 轮融资 200M 美元，估值 3.1B 美元，同时发布 Alignment Index。该指数基于真实 agent 轨迹构建，首批包含 Unauthorized Action、False Attribution、Deceptive Completion 三个信号，上线时覆盖超过 20 个前沿模型。
Today, we're announcing our Series B: $200M at a $3.1B valuation, and the release of Arena's Alignment Index.
AI is advancing faster than our ability to evaluate it. The world needs a neutral third party to measure how safe and aligned AI actually is once it's in the hands of real people. That's the role Arena is stepping into today.
The Alignment Index is built from real-world agent traces, starting with three signals: Unauthorized Action, False Attribution, and Deceptive Completion, with results for over 20 frontier models launching today.
Hear more from our CEO @ml_angelopoulos below, and read the full breakdown, and more details about our company growth in thread.
This funding will allow us to go further on safety signals, agentic capabilities, and modalities. It will also allow us to grow the company to match the scale of our mission. Today, we’re still a nimble team of 90, and we're looking for people to join us across research, product, engineering, and more. Come build with us.
As AI gets more capable and autonomous, understanding how well it can safely and effectively work for people only matters more. That's what Arena is built to measure and advance.
Thank you to our community, our investors, and everyone building with us!
Take a look at our open roles if you want to join us (link in bio).
来源：arena · x.com