Reflection AI open-sources Beam: a 501B-A23B MoE trained on 10K GB300s, Apache 2.0
AI4Code · x · 2026-10-16
Reflection AI has released the weights of Beam, its first open model: a text-only 501B-A23B MoE for coding, reasoning and agentic tasks, under Apache 2.0. The team scaled a production RL/OPD stack over the past year, running a stable job on 10K GB300s that produced 100M+ rollouts across 1M tasks, which they say significantly improved final performance. Weights are on Hugging Face alongside a model card, safety report, playground and API access.
Related event: Reflection Open-Sources Beam-1.0, a 501B-Parameter MoE with 1M Context(20 posts)→
More from Models
- Thrive Holdings benchmarks AI on real tax and IT work across 75+ firms — BorisMPower · 2026-10-16
- A Little Encouragement Makes a Small Local Model Draw a Stunning Pelican SVG — Fancy-Snow7 · 2026-10-16
- Rapid-MLX 0.16.2 brings NVIDIA Nemotron 3.5 up to 120B to Apple Silicon Macs — kuchaev · 2026-10-16
- "End of Chinese OSS" claim pushed back: open models get license almost automatically — eliebakouch · 2026-10-16
- Opus 5.5 still leads a month later, but open-weight decision models are closing in — airesearch12 · 2026-10-16
- Google restricts Gemini Pro access for Google Plus subscribers, matching free tier — EmergencyLess8861 · 2026-10-16