Definition
Plain language
An open RL training pipeline for reasoning models used as a comparison baseline.
As stated in the literature
An open-source GRPO-based RL post-training recipe for reasoning models on math problems, used as a cost baseline against ReasonMaxxer.
Why it matters: Open, reproducible RL pipelines provide the cost baseline that new methods have to beat to claim real efficiency gains.
For example, when reporting cost savings from a new training trick, researchers compare against SimpleRL-Zoo's GRPO recipe on the same math benchmarks.
Heard on the show
“… At seven billion parameters, against a baseline called SimpleRL-Zoo that uses GRPO on roughly eight thousand math problems and costs in the hundreds to low thousands …”Episode 026 — What RL Actually Does to Language Models, at the Token Level