AI for Frontend Developers Quiz Practice
Active Recall Drill Session
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hardAI for Frontend Developers
A system prompt interpolates `new Date().toISOString()` at its very start, followed by a large stable instruction block with a cache_control breakpoint at the end. What will response.usage.cache_read_input_tokens show across repeated requests?
code
system: `Time: ${new Date().toISOString()}\n${LARGE_STABLE_TEXT}`