Introducing Beam: Reflection’s 501B open-weight model
Beam is a sparse Mixture-of-Experts model with 501 billion total parameters, 23 billion active, built for coding, reasoning, and agentic workloads.
Reflection AI
Beam
Beam is a sparse Mixture-of-Experts model with 501 billion total parameters, 23 billion active, built for coding, reasoning, and agentic workloads.
Specs
Model
- Family
- Beam
- Weights
- Proprietary
Limits
- Context
- 1,000,000 tokens
Modalities
- Input
- Text
- Output
- Text
Dates
- Announced
- 5 Oct 2026
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