Beam

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1. 2d
   Reflection AI debuts Beam, a 501B open-weight model aimed at Chinese rivals

   Reflection AI, the Nvidia-backed US startup founded by ex-DeepMind researchers, unveiled Beam — its first open-weight model — a text-only mixture-of-experts system with 501B total and 23B active parameters, pretrained on 23.8T tokens with a 1M-token context window. The company says Beam matches Z.ai's GLM-5.2 on reasoning, coding and agentic benchmarks while using 3–4x less inference compute, and approaches Qwen 3.8-Max; the claims have not been independently verified. Full weights are promised this month under an Apache 2.0 license.

   IT之家 AI · 🔥 13

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