Last Year 42% of Harvard's Faculty Said AI Hurt Their Courses. Now It's Two-Thirds.

Harvard professors spent the spring filling out a survey about artificial intelligence, and the single most uncomfortable number in it has nothing to do with how they feel about the technology.

Nearly nine in ten faculty reported receiving student work they knew or believed was produced using AI. Only 64 percent said they felt confident distinguishing AI-generated work from student-created work, and just 12 percent referred a case of unauthorized AI use for discipline.

So: almost everyone is getting it. Most are not sure they can spot it. Almost nobody is acting on it.

That is the most resourced undergraduate institution in America, with honor codes, registrars, teaching fellows and in-person exam halls. Now apply the same test to a $997 online course where the proof of value is a progress bar.

The 22-point swing

Sixty-four percent of Harvard Faculty of Arts and Sciences respondents now say AI has had a "somewhat negative" or "very negative" effect on their courses, up from 42 percent a year earlier, according to The Harvard Crimson's annual FAS survey published September 14. That 22-point shift in twelve months is the sharpest single-year move the survey has recorded.

The survey ran from April 29 through May 22, 2026, and drew 463 responses from more than 1,400 faculty across FAS and the engineering school — 292 complete, 171 partial.

The policy response was immediate and defensive. Only 3.5 percent of faculty now report having no explicit AI policy, down from 10 percent the prior year. Full bans rose to 25 percent, up from 20, while fully permissive policies dropped to 4 percent from 8.

Teaching is being rewritten around the assumption that take-home work no longer tells you anything.

The dean said the quiet part

Harvard's leadership is pulling the other way. President Alan M. Garber and College dean David Deming have urged faculty and students to embrace the technology, and in his Memorial Church address on the first day of classes Garber said he was "convinced" that AI would accelerate advances in knowledge faster than at any time in human existence.

Deming, the same day, went at the assessment problem directly. "Take-home exams and problem sets are no longer a sustainable way to assess mastery, and when coupled with unenforceable AI bans they create a difficult dilemma for students who don't want to cheat but also fear falling behind to their classmates," he wrote. He added: "We would all benefit from getting out of the AI-detection business because it damages trust between faculty and students."

His proposed fix was a shift away from take-home exams and problem sets toward proctored exams. Humanities and social science faculty pushed back hard on the rest of it, particularly his suggestion of "AI acceptance or even encouragement" in writing-intensive courses.

What this does to the certificate business

Read Deming's sentence again and swap the nouns. Asynchronous assignment becomes take-home exam. Course completion becomes assessed mastery.

Every signal the online course industry sells as proof — modules completed, worksheets submitted, final project uploaded, certificate issued — is a take-home exam. It was always weak evidence. It is now close to zero evidence, and the people with proctors and honor councils are the ones saying so out loud.

This matters commercially, not philosophically. A certificate is worth what the person receiving it believes it screens for. When an employer, a licensing board or a client assumes any submitted artifact could have been generated in ninety seconds, the credential stops being a filter and becomes a receipt.

The defensible formats are the expensive ones. Live cohorts. Oral assessment. Recorded skill demonstrations. Work reviewed by a human who asks follow-up questions. All of them cost delivery hours, which is exactly what the evergreen model was built to eliminate.

That is the trade sitting in front of anyone currently selling "certification" as the upsell. Harvard is choosing to spend the hours. The question for a solo creator with 4,000 students and no teaching assistants is whether the certificate was ever doing the selling, or whether it just looked good on the sales page.