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Claude AI's 'TodoWrite' tool may cause massive token consumption bug

By PulseAugur Editorial · [1 sources] ·

A user on Reddit's ClaudeAI subreddit has identified a potential bug in Anthropic's Claude model that causes rapid token consumption. The issue appears to stem from the 'TodoWrite' tool, which, when used to manage tasks, causes Claude to repeatedly rewrite its entire conversation cache. This occurs because updating the to-do list invalidates the cache, forcing a full re-computation of the context for each update, leading to massive token usage, with one user reporting 16.7 million tokens consumed in just 13 minutes. AI

IMPACT This bug could significantly impact user experience and costs for Claude users who rely on task management features.

RANK_REASON User-reported bug in a specific tool within a commercial AI product.

Read on r/ClaudeAI →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Claude AI's 'TodoWrite' tool may cause massive token consumption bug

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User-reported bug in a specific tool within a commercial AI product.
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120 days old
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COVERAGE [1]

  1. r/ClaudeAI TIER_2 English(EN) · /u/Adventurous_Two9033 ·

    The reason your 5-hour window evaporates in minutes: Claude rewrites its whole memory to cache every time it checks a to-do box (16.7M tokens proof)

    <!-- SC_OFF --><div class="md"><p>If you've been on this sub lately you've seen the divide: half of us posting screenshots of the 5-hour window getting eaten alive in a single message, the other half saying &quot;works fine for me, usage is generous.&quot; I was firmly in the fir…

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