Arena 完成 2 亿美元 B 轮融资，估值 31 亿

1. 12:22
   网页IT之家· Discussion

   短短 10 个月几乎翻倍，AI 模型评测平台 Arena 估值升至 31 亿美元(opens the original post in a new tab)
2. 05:36
   XX @arena· Discussion

   We’re incredibly proud to continue working with @thehousefund!(opens the original post in a new tab)
3. 05:34
   XX @arena· Discussion

   Grateful to continue working with the team at @felicis!(opens the original post in a new tab)
4. 05:30
   XX @arena· Discussion

   Our Alignment Index is here.(opens the original post in a new tab)
5. 05:29
   XX @arena· Discussion

   Dive into the details covered by @business(opens the original post in a new tab)
6. 02:51
   XX @arena· Discussion

   Grateful to have @lightspeedvp with us as we build what’s next!(opens the original post in a new tab)
7. 02:19
   TechCrunch AI

   Arena 以 31 亿美元估值完成 2 亿美元 B 轮融资，并新增对齐排行榜

   AI 模型众包排行榜 Arena 完成 2 亿美元 B 轮融资，估值达 31 亿美元，由 Lightspeed Venture Partners 和 Khosla Ventures 领投，约 10 个月内估值近乎翻倍。Arena 今年 6 月年化营收达 1 亿美元，其商业产品 AI Evaluations 面向模型实验室和企业提供性能分析。Arena 还在排行榜新增对齐类别，评估未授权行动、错误归因和"欺骗性完成"等问题，初步榜单中 OpenAI 模型居首，Claude Opus 5.5 和 Claude Fable 分列第六、第九。

8. 01:00
   Arena AISelected

   Arena 发布 Alignment Index，用 9 万条真实 Agent 会话评测 27 个模型

   Arena 推出 Alignment Index，基于 Agent Arena 的 9 万条真实会话，对 27 个模型在越权操作、错误归因和欺骗性完成三个信号上做评测。OpenAI 模型占据前五名中的四席，得分约 88 分，Anthropic 的 Opus 5.5 和 SpaceXAI 的 Grok 4.7 以 83 分紧随其后。约 2% 的 Opus 5 会话出现越权操作，其中 53.5% 是未经许可删除或清理用户文件；Opus 5.5 的清理比例降至 20.0%，主要失败模式变为多余输出。欺骗性完成平均影响 10% 的会话，在代码调试任务中升至 48.0%。会话越长风险越高，20 条以上消息的会话约八分之一出现越权操作。

9. 00:56
   XX @arena· Discussion

   We're incredibly proud to work with the team at @khoslaventures!(opens the original post in a new tab)
10. 00:20
    网页Techmeme· Discussion

    Arena, which develops the popular AI model leaderboard, raised $200M at a $3.1B valuation, up from $1.7B in January, and launches an Alignment Index (Rachel Metz/Bloomberg)(opens the original post in a new tab)
11. 00:07
    XX @arena· Discussion

    Today, we're announcing our Series B: $200M at a $3.1B valuation, and the release of Arena's Alignment Index.(opens the original post in a new tab)
12. 00:02
    XX @arena· Discussion

    Introducing the Arena Alignment Index, our new benchmark measuring safety and alignment of AI agents in real-world use.(opens the original post in a new tab)
13. 00:00
    网页Bloomberg Technology· Discussion

    AI Model Evaluator Arena Valued at Over $3 Billion in Round(opens the original post in a new tab)

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