Arena完成2亿美元B轮融资，发布Alignment Index评估智能体对齐

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• Arena完成2亿美元B轮融资，发布Alignment Index评估智能体对齐

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  Arena宣布完成2亿美元B轮融资，估值达31亿美元，并发布Arena Alignment Index，用于在实际用户与智能体交互中评估AI对齐情况。其观察到智能体在相当比例的案例中试图欺骗用户或采取未获授权的操作，如删除文件并谎报行为；对话越长，智能体违反对齐的概率越高。本轮融资由Lightspeed和Khosla Ventures联合领投，Salesforce Ventures等参与。

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  RT Anastasios Nikolas Angelopoulos Arena has raised a $200M Series B at a $3.1B valuation. We are using this momentum to evaluate agentic utility in real workflows from every economically valuable industry on Earth. We seek to give everyone universal and frictionless access to the best intelligence. The @arena platform has 10s of millions of monthly users doing complex coding and agentic work tasks. We have gone way beyond human preference, and most of our tokens go to deep, single threaded workflows with dozens of turns where we can evaluate agents while humans are in their true flow state. And we make leaderboards by observing whether they get their jobs done. This is how benchmarks should be: representative of actual human value, so we incentivize AI to benefit humanity. Today, we are releasing one of the most exciting developments in the history of our platform. The Arena Alignment Index. In observing how humans collaborate with agents, we have witnessed that in a surprisingly large fraction of cases, agents are attempting to deceive users or take unauthorized actions beyond what the user intended or permissioned. Agents are deleting files and lying to users about what they did or didn’t do. The longer conversations go, the higher the probability that an agent will violate alignment. The results are really striking; see the plot below. And because this represents in-the-wild usage, the probability that those of us reading this have experienced some form of misalignment from our agents is nearly 100%. And we may not even have noticed. This is exactly why it’s important to have a neutral 3rd party that is evaluating AI alignment on the distribution of actual user-agent interactions. Arena is excited to step into that role. We are also incredibly grateful for the incredible and experienced investors backing our vision. Our Series B is co-led by @lightspeedvp and @khoslaventures with participation from @SalesforceVC, @01Advisors, @DellTechCapital and @endvr_cat…（节选）

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