Claude Fable 5.1 Cuts Cache Costs by 75%, Boosting Coding Agent Efficiency
mark_k · x · 2026-09-02
One of the most underrated improvements in Claude Fable 5.1 is the pricing of cached tokens. Cache reads have dropped from $1.00 to $0.25 per million tokens, a massive 75% reduction, while input and output prices remain unchanged.
This significantly impacts coding agents and other long-running workloads where large context portions are reused. Anthropic estimates a 25% cost reduction for typical workloads and up to 45% for highly agentic tasks.
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