Reflection AI unveils Beam: a 501B-parameter open model with 23B active, weights out this month
bigblueboo · x · 2026-10-06
Reflection AI introduced Beam, a 501B-total/23B-active open model built from scratch, excelling at coding, agentic, and scientific workloads. The team claims the largest openly documented RL run; full weights ship this month under Apache 2.0 with FP8/NVFP4 quantizations, after final red-teaming. CEO Misha Laskin shared his personal journey from physics to AI.
Related event: Reflection AI Debuts Beam, a 501B-Parameter Open-Weight Model(19 posts)→
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