1-hour cache write cost undercounted by 37.5%: Claude

Quick fix

Update Claude Code to a version containing this fix so 1-hour cache writes are billed at 1.6 times the 5-minute cache write rate.

Symptom

Error outputCopy

全部写入都按定价表的缓存写入单价计费：1000 × $6.25/M = **$0.00625**。内置 Claude 定价行填的是 5 分钟价，所以 1h 写入少算 37.5%。

English translation

All writes are billed at the cache write rate in the pricing table: 1000 × $6.25/M = **$0.00625**. The built-in Claude pricing row uses the 5-minute rate, so 1-hour writes are undercounted by 37.5%.

Cause

Claude responses and session imports read only the aggregate field `cache_creation_input_tokens` and do not distinguish between `ephemeral_5m_input_tokens` and `ephemeral_1h_input_tokens` in `usage.cache_creation`. As a result, cost calculations bill all cache writes at the 5-minute cache write rate, while 1-hour cache writes should be calculated at 1.6 times that rate.

Fix

1. 1

   Use a CC Switch version containing this fix; the issue says only that the fix and regression tests were written, and does not provide a released version number.

Affected Versions

ToolClaude Code

Version3.20.2（报告版本；issue 指出 main @ f2537fdf、v3.20.4 之后仍有问题）

PlatformsmacOS

Source Issues

This page is distilled from 1 real issues

• #7652[Bug][Claude] 1 小时缓存写入按 5 分钟价计费：1h 缓存写入成本少算 37.5%

FAQ

(No FAQ yet)

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