Remember explaining o3 was much smarter than 4o, while users thought the bigger number meant upgraded

JeremyNguyenPhD · x · 2026-09-25

The author recalls the communication pain caused by OpenAI's confusing model naming: telling colleagues and clients that o3 was far smarter than 4o, only for them to see the "o" and the numbers and conclude that since they were paying for ChatGPT they must already be on the upgraded model — 4, not 3. A well-known example of counterintuitive AI model naming.

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