Claude Code hits 95.4% cache hit-rate vs Codex's 86.4% across 7,565 agentic coding trials

zainhas · x · 2026-08-25

Across 7,565 agentic coding trials, the author measured average cache hit-rates for various harnesses: Claude Code reached 95.4% while Codex sat at 86.4%, a gap of nearly 9 percentage points.

Cache hit-rate directly affects real API costs since cached tokens are billed at steep discounts — a useful cost-side data point when picking a coding agent tool.

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