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Physix Frontier · News Briefing Card (Hacker News · Oct 16, 2026)

Reflection AI Releases First Open-Weight Model Beam on Hugging Face

KEY FACTS

  • Reflection AI has released Beam, its first open-weight model, targeting coding, reasoning, and agentic tasks.
  • The model is now live on Hugging Face, with multiple versions available for download.
  • The main version has 501B parameters, with 23B active parameters.
  • An FP8 quantized version is also offered, with the same 501B parameter scale.
  • There is also an NVFP4 version, listed at 255B parameters.

KEY DATA

501BMain model parameters
23BActive parameters
255BNVFP4 version parameters

PHYSIX OBSERVATION

Reflection previously presented itself as closed-source, and now opening the weights of a flagship-class model amounts to stepping directly onto the front line of open-source large models. With 501B total parameters paired with 23B active, it takes a sparse, efficient route, making it a genuinely practical option for teams that want self-deployment. But whether open weights can buy an ecosystem still depends on whether follow-up fine-tuning and tooling can keep up.

Source: Hacker News report