MBZUAI Releases Fully Open-Source K2 Horizon, Claims Performance Par with Gemini 3.1 Pro
Profanion · reddit · 2026-09-04
MBZUAI has released K2 Horizon, a fully open-source LLM claimed to match Gemini 3.1 Pro in performance.
The transparency scope is unusually broad, going far beyond weights:
- Intermediate checkpoints, training data, and detailed data-construction recipes
- Open architecture, mixture compositions, training code, and configurations
- Fine-grained logs and evaluation results
The parity claim awaits independent verification, but the release aligns with the recent wave of fully open hero training runs.
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