Arena's Series B: $200M at $3.1B, and a New Way to Measure AI Alignment

https://arena.ai/agent Arena has announced a $200M Series B at a $3.1B valuation, and is releasing the Alignment Index, an independent measure of AI-human alignment built from traces of real-world tasks. Alignment Index: https://arena.ai/blog/ai-alignment-index Series B announcement: https://arena.ai/blog/series-b 0:00 Series B: $200M at a $3.1B valuation 0:33 Arena's growth: sessions, votes, and Agent Arena 0:58 Introducing the Alignment Index 1:32 The three safety signals