OpenGCM

About

OpenGCM is an independent, open-source AI research organization. Our main focus is Hydrion — a series of language models we're pretraining from scratch, aimed at understanding what small models can do when you build them yourself instead of just fine-tuning someone else's.

We also maintain GCM, a line of code-focused chat models built by fine-tuning existing open-weight models.

Everything we release — weights, training data, and methods — is public.

Hydrion

Our pretrained model series, trained from the ground up rather than fine-tuned.

GCM

Code-focused chat models, fine-tuned on top of existing open-weight base models.

GCM Mark II scores 74.4% pass@1 on HumanEval and 62.2% pass@1 on MBPP.

Vision

We believe AI should be:

• Open — transparent training data, weights, and methods
• Efficient — capable models that don't require massive infrastructure
• Customizable — built to be fine-tuned, extended, and adapted
• Accessible — usable by anyone, not gatekept behind closed systems

Research

Current focus areas:

• Small language model pretraining from scratch (Hydrion)
• Efficient fine-tuning of existing models (GCM)
• Model evaluation and benchmarking
• Local AI deployment

Follow along in our Research space.

Team

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