Provider
Anthropic API models and prices
Claude models bill the full million-token window at one rate and discount cache reads heavily, which suits long agent loops. The newest models reject forced tool choice, so agents should send tool_choice auto with strict tool schemas.
| Claude Fable 5.1 | $10 | $0.25 | $50 | 1M | 2026-09-01 |
| Claude Opus 5.5 | $4 | $0.20 | $20 | 1M | 2026-09-22 |
| Claude Sonnet 5.5 | $2 | $0.20 | $10 | 1M | 2026-09-28 |
| Claude Haiku 4.5 | $1 | $0.10 | $5 | 200K | — |
Official price page ↗Compare in the calculator