Tier Sub-Agent Models by Depth: Opus at the Root, Haiku at the Leaves

Keeps deep agent trees from billing flagship rates at every frame; biggest impact on recursive jobs that fan out several levels Advanced 2 min read

Claude Code sub-agents can now spawn their own sub-agents up to 5 levels deep. If every frame inherits your flagship model, a deep tree multiplies Opus-priced tokens. Make the model cheaper as depth increases.

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