LMArena

Timeline

1. Oct 8, 2026 · Funding / M&A · 1 source
   Popular AI leaderboard Arena nearly doubles valuation to $3.1B valuation in 10 months
   The company behind the popular LMArena leaderboard has raised $200 million led by Lightspeed and Khosla, and is now measuring AI models on alignment issues such as lying.
2. Oct 6, 2026 · Research paper · 1 source
   Certified Corruption Budgets: Anytime-Valid Leaderboard Claims under Adaptive Rigging
   Public leaderboards for AI models are read continuously, and attackers can see every published standing.