Johannes Hagemann
Co-founder and CTO of Prime Intellect; co-author of the INTELLECT-1, INTELLECT-2 and INTELLECT-3 reports
- Co-founder and Chief Technology Officer, Prime Intellect12
Johannes Hagemann is a co-founder and the chief technology officer of Prime Intellect, which builds infrastructure for training and deploying open AI models. Hagemann's site describes earlier work at Aleph Alpha on a distributed training framework, and Hagemann is a co-author of the technical reports for Prime Intellect's INTELLECT-1, INTELLECT-2 and INTELLECT-3 models.12345
Career
Hagemann joined Aleph Alpha in early 2022 to help build a distributed training framework. At the end of 2023, Hagemann and Vincent Weisser committed to building Prime Intellect, which Hagemann describes as a stack for open AI, from agentic models to the infrastructure used to train, fine-tune and deploy them. Hagemann's GitHub profile lists the role of co-founder and CTO.12
Research
Hagemann co-authored OpenDiLoCo (2024), an open-source framework for distributed training with low communication between sites, and the INTELLECT-1 technical report (2024) on a model trained across distributed infrastructure. Later reports include INTELLECT-2 (2025), a reasoning model trained through globally decentralized reinforcement learning, and INTELLECT-3 (2025).6345
Hagemann is also a co-author of TOPLOC (2025), a locality-sensitive hashing scheme for verifiable inference, and of METAGENE-1 (2025), a metagenomic foundation model for pandemic monitoring.78
Work
INTELLECT model seriesOpen weights
Co-author of the INTELLECT-1 (2024) and INTELLECT-2 (2025) technical reports, which describe Prime Intellect's models trained on globally distributed compute.34
INTELLECT-3Open weights
Co-author of the INTELLECT-3 technical report (2025), which describes a mixture-of-experts model post-trained with large-scale reinforcement learning.5
OpenDiLoCo (external site: arxiv.org)Published research
Co-author, with Sami Jaghouar and Jack Min Ong, of OpenDiLoCo, an open-source framework for globally distributed low-communication training.6
Career timeline
2022
Joined Aleph Alpha to help build a distributed training framework.1
2023
Committed with Vincent Weisser to building Prime Intellect at the end of the year.1
Jul 2024
Co-authored OpenDiLoCo, a framework for globally distributed low-communication training.6
Dec 2024
Co-authored the INTELLECT-1 technical report.3
Jan 2025
May 2025
Co-authored the INTELLECT-2 technical report on decentralized reinforcement learning.4
Dec 2025
Co-authored the INTELLECT-3 technical report.5
Other documented roles
Roles the sources document but that are not confirmed as current.
- Worked on a distributed training framework, from early 2022, Aleph Alpha1
Related people
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