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Prompt Chaining

Fixed sequential steps. Predictable cost.

API Calls per Conversation

Low

2

Mid

3

High

5

Best Use Cases

Document processing pipelinesMulti-step content creationData extraction + validationSequential reasoning tasks

Cost Drivers

  • Number of chain steps (2-5 typically)
  • Context passed between steps — each step's output becomes the next step's input
  • Failure in any step may require restarting the chain

Monthly Cost Scenarios

100/day

Haiku 4.5

$90-180/mo

100/day

Sonnet 4.5

$270-540/mo

1,000/day

Sonnet 4.5

$2,700-5,400/mo

Optimization Tips

  • Minimize context passed between steps — only forward what the next step needs
  • Use cheaper models for intermediate steps (e.g., Haiku for extraction, Sonnet for final synthesis)
  • Add validation between steps to fail fast and avoid wasting tokens on bad intermediate results

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