Anthropic adds dynamic workflows letting Claude orchestrate up to 1,000 parallel agents

Anthropic is adding dynamic workflows to Claude Managed Agents, letting a lead agent plan tasks, distribute them to up to 1,000 parallel sub-agents, and merge their results.

In Anthropic's test, a 116,000-line codebase with 70 hidden bugs saw a single agent catch 14 to 27 per run, while the dynamic workflow consistently caught 66.

To activate it, users select the "multiagent_20261001" agent type, and Anthropic recommends starting small because the workflows can use a lot of tokens.