Reflection AI, a U.S. startup backed by Nvidia, has launched Beam, a 501-billion-parameter sparse mixture-of-experts open-weight AI model. This model, specialized in coding, reasoning, and agentic tasks, reportedly rivals Chinese models like GLM-5.2 and approaches Qwen3.8-Max on specific tasks. The announcement has prompted market participants to reassess Anthropic’s competitive position, with market data suggesting a notable reduction in the probability of Anthropic maintaining the best AI model status by November 2026. Independent verification of Beam’s performance remains pending as public weights and technical reports have yet to be released.
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