MODEL SIGNAL · REFLECTION AI · NEW
Beam
Beam is Reflection’s first open-weight, sparse Mixture-of-Experts model with 501 billion total parameters and 23 billion active parameters, built for coding, reasoning, and agentic workloads.
CATEGORYGeneral
CONTEXT256000
RELEASEDOctober 5, 2026
Key Features
- Open-weight model
- Sparse Mixture-of-Experts architecture
- 501 billion total parameters
- 23 billion active parameters
- Built for coding, reasoning, and agentic workloads
- 256K maximum context length
- Apache 2.0 weights planned
Read the Model Signal report →
The designed Model Signal report for Beam is still in review. It will publish here after the fact and quality gates clear.