Anthropic releases free one-hour crash course on building AI agents with Opus 5.5

Anthropic engineers have released a free crash course on building AI agents with Claude Opus 5.5. The whole thing runs about one hour. The timing is deliberate. Opus 5.5 is only weeks old, and Anthropic now needs developers who know how to use it. What’s in the course The crash course was made public in mid-October 2026. It covers Claude Managed Agents, agent architecture, and a concept Anthropic calls agent dreaming. The video is split into four timestamped segments, so viewers can jump to what they need. The introduction starts at 00:00. Agent architecture begins at 07:45, which covers how an agent is structured: what it knows, what tools it can reach, and how it decides what to do next. Skill-building starts at 23:40 and takes up the biggest chunk of the runtime. The final segment, dreaming and orchestration, kicks off at 54:00. The model behind the lesson Claude Opus 5.5 launched on September 22, 2026. Its main selling point is cost efficiency. Opus 5.5 performs at a level comparable to its predecessor, Opus 5. It does so at roughly 40% lower cost on typical workloads, at about $4 per million tokens compared to $20 for Opus 5. Price matters more for agents than for regular chat...