Sub Agent Model

Sub-Agent Model

Each sub-agent runs on an optimized model for its task type:

Model	Usage	Examples
opus	Complex reasoning, architecture	Code review, design analysis
sonnet	General tasks (default)	Agent creation, code generation
haiku	Fast, simple operations	File search, validation

Parallel Execution

Claude Code selects the appropriate model and parallelizes independent tasks (up to 4 concurrent sub-agents):

/create-agent
  |-- mgr-creator:sonnet       - agent scaffolding
  +-- mgr-supplier:haiku       - dependency check

/code-review
  |-- lang-golang-expert:sonnet - Go implementation
  |-- lang-python-expert:sonnet - Python implementation
  +-- qa-engineer:sonnet        - test generation

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See also: Customization | Agents