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Reflection launches its US-trained Beam open model

latent.space 11 min read Editor score 6/10

Reflection says Beam was trained from scratch in the US, while the roundup reports that several leading models are ahead of it. The launch adds another option to the open-model ecosystem, though the excerpt offers little technical detail.

What

Reflection announced Beam, a text-only mixture-of-experts model with 501B total parameters and 23B active, trained from scratch.

How

The team cites 23.8T pretraining tokens, while the roundup says several leading models are generally ahead of Beam.

Why it matters

Beam adds a US-trained open-weight option, though engineers should weigh the reported comparisons when evaluating it.

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