OpenAI to Acquire Neptune.ai to Strengthen AI Training Infrastructure and Experiment Tracking

OpenAI has signed a definitive agreement to acquire neptune.ai, a company known for its advanced tooling for tracking machine learning experiments and monitoring model training workflows. The acquisition is expected to deepen OpenAI’s infrastructure for frontier research and accelerate the development of next-generation AI systems.

Neptune.ai has long focused on building tools that give researchers clear, real-time visibility into how AI models learn and evolve. Its platform allows teams to monitor experiments, analyze metrics, compare thousands of training runs, and diagnose issues that emerge during large-scale model development—all capabilities that have become increasingly essential as models grow more complex.

OpenAI said the acquisition builds on an already close working relationship. Neptune has recently collaborated with OpenAI on tools that help researchers understand model behavior across layers and surface anomalies during training. By integrating Neptune’s capabilities directly into its training stack, OpenAI expects to improve the speed, transparency and precision of its research process.

“Neptune has built a fast, precise system that allows researchers to analyze complex training workflows,” said Jakub Pachocki, Chief Scientist at OpenAI. “We plan to iterate with them to integrate their tools deep into our training stack to expand our visibility into how models learn.”

Piotr Niedźwiedź, founder and CEO of Neptune, called the acquisition an opportunity to scale the company’s mission. “We’ve always believed that good tools help researchers do their best work. Joining OpenAI gives us the chance to bring that belief to a new scale,” he said.

The move reflects OpenAI’s strategy of strengthening the internal infrastructure required to train increasingly sophisticated frontier models. With Neptune’s tooling, OpenAI aims to streamline experimentation, improve the interpretability of training behavior, and shorten the cycle from insight to model improvement.

OpenAI said it looks forward to building the next chapter of training tools together with the Neptune team, signaling that deeper integration between their engineering and research workflows is already underway.