Optimizely CMS 13: What Actually Changed and Why It Matters

Optimizely CMS 13 launched on 31 March 2026 as the most significant release since CMS 12. Key changes include Visual Builder becoming the default editing experience, Optimizely Graph becoming mandatory (replacing Search and Navigation), and the introduction of GEO (Generative Engine Optimisation) for AI-driven content discoverability. The Opal AI agent layer adds context-aware automation including a Content Model Agent, FAQ Creation Agent, and Content Refresh Agent. The platform is built on .NET 10 with an embedded DAM, Graph-powered semantic search, and a JavaScript SDK. Upgrade planning requires attention to GDPR compliance, Opti ID SSO setup, deployment model limitations (on-premise vs PaaS/SaaS), and Commerce 15 migration for commerce customers. CMS 11 support ends and CMS 12 will receive only annual major updates.