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Notes from the build

The Blog

Build logs, prompt breakdowns and hard-won lessons from shipping production AI software with Claude.

2 articles tagged Claude Opus 5

Most people are overpaying for the wrong AI model tier.
AI models
2 min readThe AI University

Most people are overpaying for the wrong AI model tier.

Not every AI model labelled flagship is actually best in class. Five tiers, mapped end to end — and the one where most teams quietly overpay.

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Claude Code Prompt Caching: The 20x Rule That Decides Your Bill
prompt caching
1 min readThe AI University

Claude Code Prompt Caching: The 20x Rule That Decides Your Bill

Claude Code prompt caching decides if your next message costs cents or dollars. Here's the 20x math, the one-hour clock, and three ways to reset clean.

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