Arena (formerly LMArena)
Arena, formerly LMArena, operates the Chatbot Arena, a public leaderboard that ranks AI models using crowdsourced human preference votes. The project began in 2023 as an academic effort at UC Berkeley under the LMSYS research organization, was incorporated as a company in April 2025, and was rebranded as Arena in January 2026. Anastasios Angelopoulos is […]
Reflection AI
Reflection AI is a New York-based AI lab founded in 2024 by Misha Laskin, its CEO, and Ioannis Antonoglou, its CTO. It positions itself as an American open frontier lab, an alternative to closed model developers, with a plan to release model weights publicly while keeping datasets and training pipelines proprietary. Laskin previously led reward […]