K2 HorizonFrontier performance. Radical openness.
Meet K2 Horizon: The largest fully open-source model launch in AI history, spanning six models that give you greater choice in capabilities, scale and deployment options, along with open access to training code and data.
Our enterprise-ready flagship model, built to compete with leading open-weight models on coding and agentic work.
With complete visibility into model training and evaluations, advanced agentic capabilities, and an efficient cost per task, our newest K2 generation gives researchers and builders the right-size foundation for dependable, long-context, agentic applications at every scale.
Well-rounded capabilities
-
Agentic tasks and complex problem-solving
Across coding and agentic tasks, K2 Horizon delivers top-tier performance in every size class.
-
Fully open for customization
For every model, we release final weights, training code, checkpoints, and data-construction recipes or training data, so you can inspect, reproduce, fine-tune, and extend it.
-
One connected fleet
The models share core architectural decisions, training methodology, and deployment tooling. This consistency makes it easier to move between sizes, route workloads across the fleet, and study capability and efficiency across scales.
K2 Horizon Performance Evaluation
A glass box, not a black box
Verifiable AI requires going beyond open weights. We offer granular transparency into our training code, training data composition, and evaluations. Inspect how K2 Horizon was built, reproduce it, then modify it.
-
Training data We provide the full pre-training corpus.
-
Training code We make both our pre-training and post-training code available so you can rerun or modify the training pipeline.
Get started
Deploy
- Hugging Face
- vLLM
- SGLang
-
Ollama
Flexing across everyday use-cases
-
RFP Review without the grind Procurement
-
Your Handbook, Answered Instantly People & HR
-
Your Data, Dashboard-Ready Data
-
RFP Review without the grind Procurement
-
Spot Billing errors every invoice line Finance
Unlocking future breakthroughs across industries
K2 isn't the easy summit. It's the one that proves what's possible.
-
Amber
Dec 2023 -
K2 Think
Sep 2025 -
K2 V2
Dec 2025 -
K2 Think V2
Jan 2026 -
K2 Horizon
SEP 2026
K2 is a critical part of IFM’s mission to make foundational AI a shared resource. We release some of the most transparent models in the world so that researchers and builders can advance on top of them.
IFM is developing AI as a shared resource for everyone.
-
K2 Horizon A family of radically open frontier foundation models
- Jais Gen 2 State-of-the-art open-source Arabic LLM for 400 million speakers worldwide.
- PAN Next-gen foundation model for embodied reasoning and physical-world simulation
Get in touch with the Institute of Foundation Models Contact us