--- title: Why 86% of Claude Code Bill Has Nothing to Do With Your... description: A detailed breakdown of where Claude Code token costs actually come from, based on a 30-day trace across a 45-person engineering team. Only 14% of input tokens... canonical: https://daily.dev/posts/why-86-of-claude-code-bill-has-nothing-to-do-with-your-prompts-x7bul1gei twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Why 86% of Claude Code Bill Has Nothing to Do With Your Prompts | daily.dev og:description: A detailed breakdown of where Claude Code token costs actually come from, based on a 30-day trace across a 45-person engineering team. Only 14% of input tokens... og:url: https://daily.dev/posts/why-86-of-claude-code-bill-has-nothing-to-do-with-your-prompts-x7bul1gei og:image: https://api.daily.dev/og/posts/x7BUl1GeI.png og:image:alt: Why 86% of Claude Code Bill Has Nothing to Do With Your Prompts og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Why 86% of Claude Code Bill Has Nothing to Do With Your Prompts **[Daily Dose of Data Science \| Avi Chawla \| Substack](https://daily.dev/sources/dailydoseofds)** · 12 min read · 0 upvotes · 0 comments ## Summary A detailed breakdown of where Claude Code token costs actually come from, based on a 30-day trace across a 45-person engineering team. Only 14% of input tokens are actual user prompts — the rest comes from static overhead, MCP server schemas, CLAUDE.md files, tool results, prior assistant context, and thinking tokens. The post explains each cost category, highlights the visibility gap in existing tools, and introduces Comet's Opik Cost Intelligence plugin as a solution. Practical audit steps are also provided: removing unused MCP servers, shrinking CLAUDE.md, switching to medium thinking effort, keeping sessions short, and defaulting to Sonnet over Opus for routine work. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#mcp](https://daily.dev/tags/mcp), [#claude-code](https://daily.dev/tags/claude-code), [#context-engineering](https://daily.dev/tags/context-engineering) [View this post on daily.dev](https://daily.dev/posts/why-86-of-claude-code-bill-has-nothing-to-do-with-your-prompts-x7bul1gei) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Why 86% of Claude Code Bill Has Nothing to Do With Your Prompts","url":"https://daily.dev/posts/why-86-of-claude-code-bill-has-nothing-to-do-with-your-prompts-x7bul1gei","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/why-86-of-claude-code-bill-has-nothing-to-do-with-your-prompts-x7bul1gei"},"datePublished":"2026-07-30T22:50:15.705Z","dateModified":"2026-07-31T14:38:09.197Z","description":"A detailed breakdown of where Claude Code token costs actually come from, based on a 30-day trace across a 45-person engineering team. Only 14% of input tokens...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/c691c6a263e745225de1c3cc9cc4beba?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/c691c6a263e745225de1c3cc9cc4beba?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Daily Dose of Data Science | Avi Chawla | Substack","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Daily Dose of Data Science | Avi Chawla | Substack","logo":"https://media.daily.dev/image/upload/s--4IHQgTOw--/f_auto/v1710503712/logos/dailydoseofds","url":"https://daily.dev/sources/dailydoseofds"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/why-86-of-claude-code-bill-has-nothing-to-do-with-your-prompts-x7bul1gei","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"mcp,claude-code,context-engineering","timeRequired":"PT12M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Daily Dose of Data Science | Avi Chawla | Substack","item":"https://daily.dev/sources/dailydoseofds"},{"@type":"ListItem","position":3,"name":"Why 86% of Claude Code Bill Has Nothing to Do With Your Prompts"}]} ```