RL Data Infrastructure

RL data that makes models think harder

We build high-quality reinforcement learning datasets — from code reasoning and competitive programming to multimodal tasks. Every sample is verifiable, every reward signal is grounded.

What we deliver

End-to-end RL data pipelines — from problem curation to verified reward signals.

Code RL & OJ Datasets

Competitive programming problems with verified test cases, automated judging, and outcome-based reward signals. Built on our own online judge infrastructure.

Reasoning & Math

Chain-of-thought datasets for mathematical reasoning, proof generation, and logical deduction. Ground-truth verifiable outputs for reliable reward modeling.

Multimodal & Embodied

Vision-language pairs, spatial reasoning tasks, and embodied action sequences. Expanding into robotics and real-world interaction data.

RLHF & Preference Data

Human preference rankings, comparison pairs, and reward model training sets. Scalable annotation pipelines with expert labelers.

Data domains

Currently focused on code & reasoning. Expanding across every modality.

Code RL Competitive Programming Math Olympiad Reasoning Chains RLHF Preference Instruction Tuning Multimodal Embodied Intelligence Multilingual

Let's talk data

Whether you need 10K samples or 10M, we'll scope a pipeline that fits your model's appetite.

contact@delean.ai