Reflection AI's Beam-1.0-501B-A23B debuts at #6 among US labs on Agent Arena

arena · x · 2026-10-17

Agent Arena announces that Reflection AI's Beam-1.0-501B-A23B (501B total params, 23B active) has landed on the leaderboard, ranking #6 among US labs and #13 overall — placing Reflection AI in the top 15 labs. The release is also positioned as a contribution to the open-source ecosystem.

Related event: Reflection AI debuts open-weight Beam-1.0-501B, ranking among top US open models(5 posts)→

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