Why You Keep Hitting Your Claude Code Limit

Every message you send in Claude Code carries your whole conversation with it, and every round of tool calls sends it again. Prompt caching makes that cheap, until something breaks the cache. This video draws what one message really sends, why the cache usually saves you, the three things that quietly break it (a long break, switching models, fast mode), the spenders that run while you're away, and the math: at list prices, the same message after a break can cost 40 times as much. Then 5 habits that keep your usage down. Product details as documented on 10 October 2026. Sources • Claude Code docs — Manage costs effectively (why usage climbs in a long session): https://code.claude.com/docs/en/costs • Claude Code docs — How Claude Code uses prompt caching: https://code.claude.com/docs/en/promp... • Anthropic — Pricing: https://platform.claude.com/docs/en/a... • Claude blog — Lessons from building Claude Code: Prompt caching is everything (Apr 2026): https://claude.com/blog/lessons-from-... • Claude Help Center — Using Claude Code with your Pro or Max plan: https://support.claude.com/en/article... • Claude Code docs — Errors (usage limits): https://code.claude.com/docs/en/errors Chapters 0:00 One question, the whole conversation 0:27 What one message really sends 1:06 Prompt caching: the bookmark 2:01 3 cache breakers 2:53 Hidden spenders 4:04 The math: one break, 40x 5:02 5 habits that keep usage down Previous video, on what fills your context window in the first place:    • Claude Code Context Window: Why It Forgets   And on prompt caching itself:    • Why prompt caching can cost you more   Credits: the host is an AI-generated presenter (Google Flow); narration is an AI voice (Google Gemini text-to-speech, voice "Charon") reading a script written for this channel; animation built with HyperFrames (open source, HeyGen); documentation screenshots quoted briefly for commentary, sources above. How long do your Claude Code sessions run before you clear them? #ClaudeCode #AICoding #PromptCaching