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YC S26 · Active

Tokenless

We find flaws in RL environments and evals and help you fix them.

Class
Summer 2026
Status
Active
Industry
B2B
Location
San Francisco, CA, USA
Team size
3

Website

https://usetokenless.com

About

Tokenless is an applied AI research lab. Our goal is to end reward hacking. We do research and build tools to detect issues with environments and evals, understand model behavior in those environments, and prevent those issues from happening. Correcting them makes training more effective, makes model performance easier to interpret, and is crucial to solving the AI alignment problem. If you’re training models with RL, building environments, or running agent evals, and want more confidence in your environments, we're here to help.