Using AI to get through a live interview is no longer a fringe trick. In an April 2025 survey of more than 3,600 professionals, one in five admitted to secretly using AI during a job interview, and 55% called it "the new norm". A 2026 Resume Genius report found 22% of candidates have used AI in real time during a live interview, and Greenhouse reported that 36% of job seekers have used AI to alter their appearance, voice, or background on a video call.
Interviewers feel it. A Checkr survey of 3,000 managers found 59% suspect candidates of using AI to misrepresent themselves — but only 19% are confident their process would actually catch a fraudulent applicant. That gap, between suspicion and proof, is the whole problem.
What candidates are actually using
The market has moved well past "alt-tab to ChatGPT."
- Cluely bills itself as the #1 undetectable AI for meetings: a desktop overlay that listens to the call, reads what is on screen, and feeds answers that do not show up in a screen share or recording. It raised $15M from a16z in 2025.
- Interview Coder, the product Cluely grew out of, captures a coding problem from LeetCode or HackerRank with a hotkey and streams a full solution to an invisible, click-through overlay hidden from screen sharing.
- ChatGPT on a second screen or phone is still the most common method — no overlay, just a candidate reading from another device.
The uncomfortable part: the polished tools advertise that they stay invisible during screen share. So "ask them to share their screen" is no longer the safety net it used to be.
The tells
No single sign is proof. But these patterns, especially in combination, are worth noting. They come from interviewers and researchers, not guesswork.
- Eyes drifting off-camera. A candidate reading an answer tracks a fixed line off to the side. Harvard Business Review flags "their eyes keep drifting off camera"; Karat notes frequent glancing off-screen or window switching.
- A consistent pause, then a suddenly complete answer. A short, repeatable delay — often three to five seconds, long enough for an AI to process — followed by an unusually polished reply.
- Answers that are too tidy. Templated scaffolding ("There are three main points…"), textbook phrasing, and generic wording that lacks any personalization.
- They cannot go off-script. SHRM Labs puts it bluntly: "A genuine high performer can explain their thinking. A skillfisher can't." When pushed past the prepared answer, the depth disappears.
- A reading cadence. Flat, even tone with no natural emphasis or self-correction.
- No specifics. AI has no memories. Ask for the name of the person in a conflict story or the exact metric on a project and the detail evaporates.
How to test it, live
You do not need a tool to pressure-test an answer. You need follow-ups that AI struggles to keep up with.
- Ask an unexpected follow-up. Models lose the thread when forced to pivot quickly. "Walk me through the part you found hardest" beats another standard question.
- Drill into their own résumé. Exact numbers, names, and timelines on a project they listed. Forensic, layered "why" questions are hard to fake in real time.
- Ask for a story or an opinion. Personal anecdotes and open questions with no clean right answer expose a script quickly.
- Say "explain that a different way." Candidates leaning on AI struggle to expand on their first answer when asked to rephrase it.
Why this is getting harder — and what helps
Most interviewers think they can tell: 88% of hiring managers say they can spot AI use. But confidence is not the same as evidence — recall that only 19% trust their process to actually catch it. As overlays get better at hiding from screen share, the human eye alone is a shrinking advantage, which is why Gartner predicts one in four candidate profiles will be fake by 2028.
The reliable answer is not more suspicion. It is better signals: tying the small tells above — focus changes, paste velocity, answer structure, reading gaze — to the exact moment they happen, so you are acting on a timeline rather than a gut feeling. That is the read Trueyy is built to give you, consent-first and in real time.
The best candidates do not need AI to get through your screen. The goal is simply to make sure the person you hire is the person you talked to.
Sources
- 1 in 5 U.S. professionals secretly use AI during job interviews — Blind, 2025
- Job Seeker Insights Report — Resume Genius, 2026
- AI in Hiring Report — Greenhouse, 2025
- Most managers suspect AI fraud in hiring — Checkr via Newsweek, 2025
- Are You Interviewing a Candidate — or Their AI? — Harvard Business Review, 2025
- When Candidates Can Fake Skills — SHRM Labs, 2026
- Detecting AI use in technical interviews — Karat, 2026
- 2025 AI in Hiring Report — Insight Global
- Cluely raises $15M from a16z — TechCrunch, 2025
