Reflection launches Beam 1.0: open-weight 501B/23B model with 1M context under Apache 2.0

bhutanisanyam1 · x · 2026-10-16

Reflection.AI released Beam 1.0, its first open-weight model for coding, reasoning and agentic tasks: 501B total params, 23B active, 1M context, Apache 2.0 licensed. The release ships with optimized inference support, quantized weights, a coding harness, fine-tuning support and a verifier library; the official Hugging Face org is live.

Related event: Reflection Open-Sources Beam-1.0: 501B MoE Model with Apache 2.0 and 40+ Partners(20 posts)→

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