An open-source collection advancing frontier agentic intelligence
LegoX is a series of open-source projects spanning agentic data pipelines, training frameworks, evaluation benchmarks and foundation models. Our mission is to connect these pieces into reproducible and extensible systems that advance frontier intelligence.
Agent-native workflows connect task curation, trajectory rollout, training, and evaluation. We also release LegoFlow-SWE, with 5,000 open-source tasks and 2,780 successful trajectories filtered from 12M PRs.
An open-source framework for harness-native reinforcement learning of coding agents. Code, data, and models are available now.
Our open models and datasets have reached a new cumulative download milestone on Hugging Face—made possible by the community using and building on them.
Collaborating institutions
Hugging Face