LaunchAI ModelsOctober 5, 2026

Reflection debuts Beam, a 501B open-weight MoE model

Read original source →reflection.ai

Beam is a sparse MoE with 501B total and 23B active parameters, pretrained on 23.8T tokens in under four weeks on 6,144 Nvidia GB300 GPUs. Reflection claims 80.9 on SWE-bench Verified and 3-4x the inference efficiency of GLM 5.2, with Apache 2.0 weights due this month.

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