OpenAI · Product manager · Technical / AI Depth

What's the difference between GPT-3.5 and GPT-4?

Build a defensible answer, then pressure-test it in the same workspace where you can save the attempt.

See this question in OfferHack Browse the question first. Premium opens the complete worked answer and coaching when you need them.
Independent practice preview

This is a constructed rehearsal, not an official company answer or a prediction of what an interviewer will ask.

Start with a position

Give the interviewer your decision before the framework.

I would compare GPT generations through user-visible capability, reliability, context handling, modalities, latency, cost, and safety—not a model-name checklist.

Preview the reasoning

Three moves to make the answer concrete.

01

Plain-language answer

  • Define the concept in one sentence without hiding behind jargon.
  • Use one analogy, then state where the analogy breaks.
02

How it works

  • Input: user intent, context, permissions, and task constraints.
  • System: model, retrieval or tools, policy controls, and orchestration.
03

Product boundary

  • Choose assistive, review-first, or autonomous behavior based on consequence.
  • Expose the state a user needs to verify the output.

Measurement check

A metric is useful only when it changes the decision.

North star
Weekly successful user outcomesMeasures whether a user with a repeated, meaningful job rather than a one-time curiosity receives repeatable value.
Quality
Correction-free completion rateMakes trust and usability visible.
Guardrail
Severe failure and abandonment rateProtects against confusing activity, stakeholder enthusiasm, or model novelty with durable user value.

Interviewer pressure test

Do not stop when the first answer sounds polished.

  1. Why prioritize a user with a repeated, meaningful job rather than a one-time curiosity before an adjacent segment?
  2. What evidence would make you reject the thesis: “I would compare GPT generations through user-visible capability, reliability, context handling, modalities, latency, cost, and safety—not a model-name checklist.”?
  3. How would you test “a narrow experience that produces evidence before the product surface expands” with two weeks and a small team?

Turn reading into retrieval

Close the guide. Give the answer in your own words.

Use the free scratchpad and timer, then decide whether you need the complete worked answer and coaching.
See this question in OfferHack