OpenAI
Leading AI research laboratory developing state-of-the-art foundation models like GPT-4.
5 Rounds
~21 Days
Very Hard
The Interview Loop
Recruiter Screen (30 min)
Standard fit check, behavioral questions, and resume overview.
Technical Loop (3-4 Rounds)
Deep dive into domain knowledge, coding, and system design.
Interview Question Bank
Data Scientist
•
Technical
•
hard
We are A/B testing a new UI feature on ChatGPT that allows users to share interactive conversation snippets. How would you design the experiment to account for network effects and spillover?
#A/B Testing
#Network Effects
#Experiment Design
Data Scientist
•
Technical
•
hard
How do you determine the required sample size for a prompt-variation A/B test when the primary evaluation metric is subjective human preference (e.g., Elo rating)?
#Power Analysis
#Elo Ratings
#Variance Estimation
Data Scientist
•
Technical
•
hard
How would you design an A/B test to evaluate a new model routing algorithm (e.g., dynamically routing between GPT-4o and GPT-4-turbo) where the primary metric is perceived user latency?
#Experiment Design
#Latency Metrics
#Trade-offs
Data Scientist
•
Technical
•
hard
ChatGPT responses are highly non-deterministic. How do you measure the statistical significance of a system prompt change on overall response quality?
#Variance Reduction
#LLM Evaluation
#Hypothesis Testing
Data Scientist
•
Technical
•
hard
Explain how you would handle network effects in an A/B test for a new collaborative workspace feature in ChatGPT Enterprise.
#Network Effects
#Cluster Randomization
#Enterprise Analytics
Data Scientist
•
Technical
•
medium
You run an A/B test on a new moderation endpoint. The false positive rate drops by 2%, but latency increases by 50ms. How do you decide whether to ship it?
#Trade-offs
#Decision Making
#Safety
Data Scientist
•
Technical
•
hard
How would you estimate the cannibalization effect of releasing a cheaper, faster model (like GPT-4o mini) on our flagship model's API revenue?
#Causal Inference
#Cannibalization
#Forecasting
Difficulty Radar
Based on recent AI-sourced data.
Meet Your Interviewers
The "Standard" Interviewer
Senior EngineerFocuses on core competencies, system constraints, and clear communication.
SimulateUnwritten Rules
Think Out Loud
Always explain your thought process before writing code or drawing architecture.