K2 Horizon: Frontier Performance, Radically Open

IFM released the K2 Horizon fleet, comprising six models (0.9B, 3.7B, 7B, 32B, 36B-A4B, 375B-A23B) that achieve world-leading results in their size classes on mathematics, reasoning, coding, and agentic benchmarks, with the 36B-A4B model using a Mixture-of-Value-Attention mechanism to outperform larger rivals. All models are fully open-source under Apache 2.0, with training checkpoints, data recipes, code, configurations, logs, and final weights released, enabling reproducibility and adaptation across edge to enterprise deployments.