Trevor Khangi

Canisius ‘21 • UPenn ‘25

[Curtis G. Northcutt @cgnorthcutt]

Today we establish that AI is as good as expert human tutors for immediate GRE learning gains (p=.015, n=2,383 students, study conducted July-Sep 2026).

One hour with an expert GRE tutor: $75.
One equivalent hour with an AI tutor: 7 cents .
918x cheaper, equivalent learning (p=.044, n = 140).

In 5 of 7 academic topics, the top AI tutor beat the expert human tutors on average.

How we measured it: pre-test -> 1 hour with (AI or human or no) tutor -> post-test.
There are no LLM judges. Learning gains are post-pre. Everything is real students.

Why we did this:
> 1 trillion USD is being spent per year on machines making machines better. StudentBench shows us how to shift these resources so machines also make humans better.

Why I did this:
I grew up in rural Kentucky. My dad, grandad, and great grandad were all mailmen. Getting into a good college changed my life. Now we have done a rigorous study to help AI labs evaluate LLMs and help show how bright AI can be for students of all incomes.

I believe in good science that leads to the democratization of opportunity.

The research paper behind StudentBench: https://t.co/JfkDDllP4i
Data, code, details: in this thread

If you're wondering what I'm selling, sorry to disappoint: we released all study data for free on Hugging Face, and made https://t.co/5G9L8yAxrt free to use. Enjoy.

lots more in the video / thread!!

[Buffalo Bills @BuffaloBills]

We weren't worried, darling.

#BUFvsLAR | #BillsMafia

[Canisius High School @CanisiusHS]

Congrats to Scholar-Athlete award winners:
🎳Michael Dobrasz '21
🏀Eric Geisler '21
🏒Trevor Khangi '21
And honorable mentions:
🏊🏽‍♂️Sean Grace '21
🏒Matt Usinski '21
Nice work, gentlemen!
https://t.co/MQfd2TrAP2

#pursueexcellence

[Canisius High School @CanisiusHS]

Congratulations to our seniors! They're earning acceptance at many excellent colleges and universities. Just a few are spotlighted in this tweet. See the full list of colleges where Canisius seniors have been accepted: https://t.co/TvX8rSgm6E

#pursueexcellence #WhyCHS

[Buffalo Bills @BuffaloBills]

It's been a long time coming...

Your Buffalo Bills are AFC East Champions.

[Josh Allen @JoshAllenQB]

Ya Digg?

[Buffalo Bills @BuffaloBills]

WE'RE IN.

#GoBills

[Big Cat @BarstoolBigCat]

The Bills are officially in the playoffs

[Canisius HS Football @CanisiusHSFB]

Final:

Canisius 25
Cardinal Hayes 24

Facing adversity and a halftime deficit, Canisius fought back! On the final play of the game with no time remaining, your young Crusaders score and go for two, clinching their third state title! What a game! What a season!

#PrepTalkLive

[Canisius HS Football @CanisiusHSFB]

FINAL:

CANISIUS 27
St. Francis 21

A resilient group that began the season as a young, inexperienced group had themselves a night! Your Crusaders are back on top as the 2019 @MonsignorMartin Champions!

[Tiger Tracker @OGTigerTracker]

CHAOS.