AI Daily Digest, October 18, 2026: Reflection Opens Beam 501B, Anthropic Replaces Git

Reflection released the full weights of its 501B-parameter Beam model under Apache 2.0, Anthropic detailed Scion, its in-house replacement for Git, and Perplexity open-sourced its SPACE agent sandbox. The digest rounds up these and other AI stories from the past day.

• Beam: 501B total parameters, 23B active, 1M-token context, Apache 2.0
• Anthropic: 30,000 daily merges; Scion uses 200x less CPU and memory
• Perplexity's SPACE: 118 escape attempts by nine models, none succeeded
• Beam's NVFP4 build shrinks ~1TB of weights to ~280GB, fitting four B200s