Chat API Billing

OAStripeLast reported April 2026Low Frequency
Reported
3× across candidate reports
First seen
March 2026
Last reported
April 2026
Reported outcome
mixed

Problem Overview

Given a list of user API usage records — each containing a user ID, input token count, output token count, and a pricing plan type — compute the total cost for each user. There are two pricing plans: 1. Pay-as-you-go (per-session / per-token): Charges are calculated directly based on the…

  • The rest of the problem statement — full requirements, constraints, and edge cases
  • Approach and trade-offs — what passing candidates did, and the mistakes that sink people
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Verified Source
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