Show HN: ART – a new open-source RL framework for training agents

Hey HN, I wanted to share a new project we've been working on for the last couple of months called ART (https://github.com/OpenPipe/ART).

ART is a new open-source framework for training agents using reinforcement learning (RL). RL allows you to train an agent to perform better at any task whose outcome can be measured and quantified.

There are many excellent projects focused on training LLMs with RL, such as GRPOTrainer (

Show HN: 1.2 users a day to keep the 9–5 away

In my long career as an “almost digital entrepreneur” (a fancy way to say I’ve tried a thousand things online without making a single cent), I never really felt that “this is it, I’m so close, I’ll finally quit everything and update my passport: job title? SaaS founder.”

(Small detail: I don’t even have a passport. But I like to imagine that if I did, I’d want something cooler than “unemployed creative” written on it).

For years, I collected side projects, hobbies, half-dead MVPs, and ra


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