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Multi-Agent (Orchestrator-Workers)

Supervisor + workers. Context duplication at every handoff.

API Calls per Conversation

Low

4

Mid

8

High

15

Best Use Cases

Complex workflow orchestrationSpecialized agent teamsManager-worker task decompositionCross-domain problem solving

Cost Drivers

  • Context duplication at every handoff (1.2x per additional agent)
  • Orchestrator overhead (routing, evaluation, synthesis)
  • Measured 4.8x total cost multiplier with 4 agents in our Day 4 experiment
  • More agents = diminishing quality returns but linear cost increase

Monthly Cost Scenarios

100/day

Sonnet orchestrator + Haiku workers

$900-2,700/mo

500/day

Sonnet orchestrator + Haiku workers

$4,500-13,500/mo

1,000/day

Sonnet + Sonnet

$13,500-40,000/mo

Optimization Tips

  • Minimize handoff context — only pass what each worker needs
  • Use cheap models (Haiku) for worker agents, Sonnet for the orchestrator
  • Limit to 2-3 agents unless you have a clear quality justification for more
  • Cache shared context with prompt caching to reduce duplication cost

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