I asked Grok to calculate inflation based on the above post:
A simple average of the 146 listed year-over-year price changes is about 5.8%.
That figure is not the inflation rate. Official CPI inflation for July 2025–July 2026 was 3.4% (core inflation excluding food and energy was 2.5%). CPI is a weighted average that uses each item’s share of typical household spending. The post’s list is an unweighted collection of mostly rising categories and omits items that fell (used vehicles, some medical goods, etc.), so the 5.8% average overstates overall price change.
Grok’s mistakes:
It did not average them based on any weights. It also assumes that the government’s inflation rate is correct.
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