Anthropic API Cost Calculator
How much does the Anthropic API cost per month?
Across Anthropic's 11 priced models at 200K calls/month, the cheapest is Claude Haiku 4.5 at $830 per month, verbosity-adjusted rather than list price. The most expensive, Claude Opus 4.1, runs $12,450 per month for the identical call shape.
Verified 2026-08-08
Raw dataset: data.json. Data as of August 2026.
Ranked cost — 200K calls/month
| Model | Provider | List monthly | Effective monthly | Verbosity | Rank Δ |
|---|---|---|---|---|---|
| Claude Haiku 4.5mid | Anthropic | $830 | $700 | — | — |
| Claude Sonnet 4.6mid | Anthropic | $2,490 | $2,101 | — | — |
| Claude Sonnet 4.5midlegacy | Anthropic | $2,490 | $2,101 | — | — |
| Claude Sonnet 4midlegacy | Anthropic | $2,490 | $2,101 | — | — |
| Claude Opus 4.8mid | Anthropic | $4,150 | $3,432 | 0.96× | — |
| Claude Opus 4.7midlegacy | Anthropic | $4,150 | $3,502 | — | — |
| Claude Opus 4.6midlegacy | Anthropic | $4,150 | $3,502 | — | — |
| Claude Opus 4.5midlegacy | Anthropic | $4,150 | $3,502 | — | — |
| Claude Fable 5frontier | Anthropic | $8,300 | $7,004 | — | — |
| Claude Opus 4.1frontierlegacy | Anthropic | $12,450 | $10,506 | — | — |
| Claude Opus 4frontierlegacy | Anthropic | $12,450 | $10,506 | — | — |
Levers live on Anthropic
Prompt caching — available, guide coming soon
Batch API: up to 50% →Model verbosity: up to 94% →Context trimming: up to 47% →The billing gotcha
Claude's prompt caching writes and reads are billed separately: the first call that writes a cache entry costs more than an uncached call, and only the reuses after it are discounted. A workload that caches a prefix but calls it once per session pays the write premium every time and never reaches the saving this calculator assumes at the default cache toggle.