Reflection Beam AI Prompts: 60+ Powerful Open-Weight AI Prompts for Coding, Reasoning, Agents and Local AI in 2026 Reflection Beam is one of the newest AI model launches of October 2026, and it is already attracting attention because it takes a different approach from many mainstream closed AI models. On October 5, 2026, Reflection AI introduced Beam , its first open-weight model. Reflection describes Beam as a sparse Mixture-of-Experts model with 501 billion total parameters and 23 billion active parameters , designed specifically around coding, reasoning, and agentic workloads. The company says Beam was trained on 23.8 trillion curated tokens and underwent a large-scale reinforcement-learning process involving more than 100 million rollouts. Reflection also says Beam is competitive with larger open models on coding and agentic benchmarks while requiring substantially less inference compute. These are company-reported results and should be treated as such until independent evalu...