{"slug": "reflection-ai-introduces-beam-a-501b-open-weight-moe-model-with-23b-active-for", "title": "Reflection AI Introduces Beam: A 501B Open-Weight MoE Model With 23B Active Parameters for Coding and Agentic Workloads", "summary": "Reflection AI introduced Beam, its first open-weight model, a 501B sparse Mixture-of-Experts model with 23B active parameters built for coding and agentic workloads. Reflection AI says Beam matches GLM-5.2 on reasoning using 3 to 4x less inference compute, with Apache 2.0 weights due later in October 2026.", "body_md": "Reflection AI has introduced Beam, its first open-weight model. It is a 501B sparse Mixture-of-Experts model with 23B active parameters, built for coding and agentic work. Reflection says it matches GLM-5.2 on reasoning with 3 to 4x less inference compute. Apache 2.0 weights are due later in October 2026.\n\nThe post [Reflection AI Introduces Beam: A 501B Open-Weight MoE Model With 23B Active Parameters for Coding and Agentic Workloads](https://www.marktechpost.com/2026/10/05/reflection-ai-introduces-beam-a-501b-open-weight-moe-model-with-23b-active-parameters-for-coding-and-agentic-workloads/) appeared first on [MarkTechPost](https://www.marktechpost.com).", "url": "https://wpnews.pro/news/reflection-ai-introduces-beam-a-501b-open-weight-moe-model-with-23b-active-for", "canonical_source": "https://www.marktechpost.com/2026/10/05/reflection-ai-introduces-beam-a-501b-open-weight-moe-model-with-23b-active-parameters-for-coding-and-agentic-workloads/", "published_at": "2026-10-05 21:04:20+00:00", "updated_at": "2026-10-05 22:16:10.283718+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "ai-research", "ai-agents", "ai-products"], "entities": ["Reflection AI", "Beam", "GLM-5.2", "Apache 2.0"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/reflection-ai-introduces-beam-a-501b-open-weight-moe-model-with-23b-active-for", "markdown": "https://wpnews.pro/news/reflection-ai-introduces-beam-a-501b-open-weight-moe-model-with-23b-active-for.md", "text": "https://wpnews.pro/news/reflection-ai-introduces-beam-a-501b-open-weight-moe-model-with-23b-active-for.txt", "jsonld": "https://wpnews.pro/news/reflection-ai-introduces-beam-a-501b-open-weight-moe-model-with-23b-active-for.jsonld"}}