What is MITRE ATLAS and how does it differ from MITRE ATT&CK?

MITRE ATT&CK — adversary tactics + techniques for traditional IT systems (initial access, execution, persistence, etc). Released 2013, widely-adopted. MITRE ATLAS (Adversarial Threat Landscape for AI Systems) — equivalent for AI/ML systems. Released 2021, 14 tactic categories specific to ML lifecycle: ML model access, evasion, model extraction, poisoning, etc. Use ATLAS for: AI red team planning, defensive coverage assessment, incident classification when AI systems are attacked. SOC analysts must be ATLAS-fluent for AI security roles in 2026 — most JDs explicitly ask for ATLAS familiarity.