Claude Opus 5.5 API cost calculator
Claude Opus 5.5 (Anthropic) is priced at $4 per million input tokens, $0.2 for cached input, and $20 per million output tokens — half that through the Batch API. Verified 2026-10-01 against Anthropic's pricing page.
Priced below Opus 5 ($4/$20 vs $5/$25 per million tokens), with cache reads at 5% of the input price ($0.20/M) instead of the usual 10%.
What Claude Opus 5.5 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. | $0.013 | $65.80 | $1,974 |
| RAG over documentsRetrieved context dominates — 12k in, 500 out, 30% cached. | $0.044 | $66.48 | $1,994 |
| Coding agentGrowing context every turn — 20k in, 1.5k out, 80% cached. | $0.049 | $148 | $4,428 |
| Batch classificationTiny prompts at volume through the Batch API — 800 in, 20 out. | $0.0018 | $360 | $10,800 |
Its blast radius when an agent loops
The coding-agent workload above at 30 requests a minute — $88.56 an hour — priced at each point a team usually finds out:
Hourly alert
$88.56
Next morning
$2,125
After a weekend
$5,314
Monthly invoice
$63,763