Insights · The Last Mile of AI · 01

Your AI agent is 90% right at every step. So why does it finish only 2 out of 3 tasks?

Chihoon Shin (CEO, MSSJ · Ph.D. in Computer Science) · September 23, 2026 · 1 min read

Your AI agent can be 90% right at every step and still finish only 2 out of 3 tasks.

We saw this in our own small AI engine: 90.7% right screen by screen, but only 8 of 12 tasks finished.

Then we asked two separate reviewers to argue against us. They made good points: mistakes are linked, step tests show where things break, and checking everything costs time.

So we changed the question. Not "steps or tasks?" but "where can a mistake still be undone?"

Every job has a few points of no return: submit, pay, delete, send. Check there. Test steps on real screens before that. And give the agent a way back.

Where are the points of no return in your work?

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Sources

  • LangChain, State of AI Agents (1,340 responses, surveyed Nov 18 to Dec 2, 2025; published Jun 12, 2026).

First published on LinkedIn.

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