Describe subagent delegation in Claude Opus 5?

Subagent delegation refers to Claude Opus 5's tendency, during agentic work, to hand off portions of a task to subagents more readily than earlier Opus models did.

This is one of the behavioral shifts Anthropic's own prompting guidance calls out as worth checking when moving a workflow from Opus 4.8 to Opus 5, alongside longer default response length and more frequent narration.

Because this changes how a multi-step agentic task actually gets broken up and executed, teams with agent orchestration logic tuned around Opus 4.8's delegation patterns may need to review and adjust that logic against Opus 5's more willing delegation behavior.

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