Frontier safety frameworks: cross-lab matrix axis Anthropic RSP v3.0 Feb 2026 OpenAI PF v2 Apr 15, 2025 DeepMind FSF v3.0 Sep 2025 tier structure ASL-1..5+ Low/Med/High/Crit per capability CCL per domain CBRN ASL-3 activated May 2025 High bio; "on the cusp" Bioweapon CCL AI R&D AI R&D-2 + AI R&D-4 High; Critical pending ML R&D CCL adjustment clause yes (peer-ship) yes (Leadership) yes (added 2025) safety case (three-pillar): monitoring (can we detect?), illegibility (can U execute a plan?), incapability (does U have the capability?). external: UK AISI (renamed Feb 2025), US CAISI (renamed June 2025), EU AI Office + GPAI Code of Practice (Aug 2025). cross-lab terminology varies ("ASL" vs "High" vs "CCL"); structural alignment: three-tier capability bars.