by Amit Shekhar · 18 May 2026
Group Relative Policy Optimization (GRPO)
In this blog, we are going to learn about Group Relative Policy Optimization (GRPO). We will also see how GRPO works step-by-step and when to use it based on our use case.
Read on Outcome School ↗then come back to lock it in
Before you read, guessWhat algorithm trains LLMs by comparing answer groups and pushing toward better ones?
Ten seconds, a guess, then read — a wrong guess still makes the answer stick.
What this article covers
- What is GRPO?
- Why Do We Need GRPO?
- The Problem with PPO
- How Does GRPO Work?
- Step-by-Step Example
- The GRPO Objective in Simple Words
- Advantages of GRPO
- Practical Things to Keep in Mind
- When to Use GRPO
The article lives on outcomeschool.com. Read it there, then come back: the tutor in the margin has read it and will answer questions, and the questions below check what stayed.