Anthropic adds dynamic workflows to Claude Managed Agents

On October 9, 2026, Anthropic launched dynamic workflows for Claude Managed Agents in beta: the agent writes a program that runs many agents in phases. Limits are 64 concurrent threads and up to 1,000 agents per run, with model requests billed to the session budget.

• Dynamic workflows ship in beta under the managed-agents-2026-04-01 header
• Up to 64 concurrent threads and 1,000 agents over a run's life
• A run has no separate price; model requests count toward the session budget
• Claude Haiku 5.5 launched October 7, about 75% cheaper than Haiku 4.5