Reflection AI Opens Beam, a 501B1-Parameter MoE Model
Reflection AI posted Beam's weights under Apache 2.0; it scores 80.1 on Terminal-Bench v2.1, below GLM-5.2 (81.0) and Kimi K3 (88.3).
Why it mattersBecause Beam's weights are under Apache 2.0, teams can self-host and fine-tune it commercially, though agentic coding work that demands the best Terminal-Bench v2.1 results still favors Kimi K3.
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