Unverified50% confidenceFactExact time
Every time a message is sent, Claude Code resends the entire conversation, including the tool list, system instructions, CLAUDE.md file, skills, and all prior exchanges—even replying with a single 'OK' sends approximately 16,500 tokens.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/11/2026
First Seen
Valid until: 1/9/2027
Sources
Related Entities
Related Claims
UnverifiedClaude Code ships with built-in system instructions and tool definitions at startup, consuming over 20,000 tokens before the user inputs anything, and these are carried with every message74% similarUnverifiedIn multi-turn conversations, Claude Code cumulatively passes historical messages into the model, and after extended operation, the input tokens for a single request may accumulate to tens of thousands or even hundreds of thousands.74% similarUnverifiedIn Claude Code, by default all operations occur within the same loop and the same conversation, with each tool call result and user message appended to the underlying messages array.72% similar
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