K2 Horizon model releases

A source-backed timeline for the K2 Horizon model family, collecting release dates, labs, access details, context windows, and major lifecycle changes.

Models

Labs

Open

Recent

All models·Latest releases·Coding models·Reasoning models·Changelog

Most recent in this set

Sep 3, 2026

K2 Horizon 375B A23B

MBZUAI

Sort

1 model

K2 Horizon 375B A23B

Available

MBZUAI (IFM)Open source

The flagship sparse-MoE checkpoint of MBZUAI/IFM's K2 Horizon family (released Sep 3, 2026). 375B total / 23B active per token with a native 512K (524,288-token) context and Apache-2.0 weights on Hugging Face (IFM/K2-Horizon-375B-A23B). Ships with k2_horizon reasoning and tool-call parsers for agentic tool use, terminal workflows, and long-horizon reasoning.

MoE375B524K ctxSep 3, 2026