Anthropic’s own cost math, not a coupon rumor

Confirmed on Anthropic: cache reads drop 75% to $0.25 / MTok; typical workloads ~25% cheaper, highly agentic up to ~45%. Base input/output list prices stay $10 / $50.

1 Sep 2026 · anthropic.com

• Anthropic says Fable 5.1 cache reads cost 75% less — $0.25 per million tokens — wherever usage is billed by token.
• Anthropic estimates about 25% lower cost for typical workloads versus Fable 5, and up to about 45% for complex coding / highly agentic tasks; other list prices remain $10 input / $50 output per million tokens.

Why it mattersAgentic workloads are cache-read heavy; this is a billable change, not just a benchmark chart.