Claude Haiku 4.5 API cost calculator
Claude Haiku 4.5 (Anthropic) is priced at $1 per million input tokens, $0.1 for cached input, and $5 per million output tokens — half that through the Batch API. Verified 2026-09-17 against Anthropic's pricing page.
What Claude Haiku 4.5 costs for common workloads
| Workload | Per request | Per day | Per month |
|---|---|---|---|
| Support chatbotShort turns with a reused system prompt — 3k in, 400 out, 60% cached. | $0.0034 | $16.90 | $507 |
| RAG over documentsRetrieved context dominates — 12k in, 500 out, 30% cached. | $0.011 | $16.89 | $507 |
| Coding agentGrowing context every turn — 20k in, 1.5k out, 80% cached. | $0.013 | $39.30 | $1,179 |
| Batch classificationTiny prompts at volume through the Batch API — 800 in, 20 out. | $0.0005 | $90.00 | $2,700 |
Its blast radius when an agent loops
The coding-agent workload above at 30 requests a minute — $23.58 an hour — priced at each point a team usually finds out:
Hourly alert
$23.58
Next morning
$566
After a weekend
$1,415
Monthly invoice
$16,978