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The Math That’s Killing Your AI Agent

Towards Data Science / 3/21/2026

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Key Points

  • An 85% accurate AI agent can still fail on 4 out of 5 attempts on a 10-step task due to compounding errors across steps.
  • The article explains the compound probability math that drives production failures in multi-step AI tasks.
  • It presents a four-check pre-deployment framework designed to reduce live production failures.
  • It emphasizes end-to-end evaluation over per-step accuracy to ensure reliability before deployment.

An 85% accurate AI agent fails 4 out of 5 times on a 10-step task. Learn the compound probability math behind production failures (and the 4-check pre-deployment framework to fix it).

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