Today IFM is releasing K2 Horizon, a connected fleet of six models: 375B-A23B, 36B-A4B, 32B, 7B, 3.7B, and 0.9B. Across reasoning, mathematics, coding, agentic tasks, and general capabilities, K2 Horizon delivers top-tier performance in every size class—with the 0.9B, 3.7B, and 7B models setting new state of the art at their respective scales.
We are releasing intermediate checkpoints, training data or detailed data-construction recipes, open architecture, mixture compositions, training code, configurations, fine-grained logs, evaluation results, and final weights.
The models and code are released under the Apache 2.0 license. Datasets are released under their applicable licenses, such as ODC-BY; We disclose how the data was constructed and mixed when redistribution is not possible.
Is this the first actually open source model?
So sounds like some data is unreleased, I wonder how much.
My guess is they don’t really have the rights to release data copyrighted by others.
There is the Swiss project Apertus AI, and I think I’ve read about others but don’t remember the names.
That being said, if the benchmarks translate to real utility, it is the first competitive open source model, I’d say.
There is Olmo, that is fully open source
But the quality is not as good