Reflection has released Beam, an open-source mixture-of-experts (MoE) model with 501 billion total parameters and 23 billion active parameters. Beam supports a 1 million token context window and is designed for token-efficient reasoning, software engineering tasks, and agentic tool use. The model is available in BF16, FP8, and NVFP4 numerics and has demonstrated strong performance on coding benchmarks, including SWE Bench Pro. AI
IMPACT This release offers a powerful open-source alternative for complex reasoning and agentic tasks, potentially accelerating development in software engineering and long-context applications.
RANK_REASON Frontier-lab model release with system card. [lever_c_demoted from frontier_release: ic=2 ai=1.0]
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