K2 Horizon

K2 Horizon

Institute of Foundation Models
+
+

Related Products

  • Gemini Enterprise Agent Platform
    999 Ratings
    Visit Website
  • Google AI Studio
    30 Ratings
    Visit Website
  • LM-Kit.NET
    29 Ratings
    Visit Website
  • LTX
    182 Ratings
    Visit Website
  • Concord
    237 Ratings
    Visit Website
  • RentGuruz
    8 Ratings
    Visit Website
  • RouteGenie
    49 Ratings
    Visit Website
  • Descartes Fleet Performance Management
    28 Ratings
    Visit Website
  • Planview AdaptiveWork
    714 Ratings
    Visit Website
  • ManageEngine Endpoint Central
    3,286 Ratings
    Visit Website

About

K2 Horizon is a connected fleet of six open models spanning 375B-A23B, 36B-A4B, 32B, 7B, 3.7B, and 0.9B, designed to deliver strong performance across reasoning, mathematics, coding, agentic tasks, and general capabilities. The models share core architecture, vocabulary, training methodology, interfaces, evaluation infrastructure, and deployment tooling, making it easier to move between sizes and route workloads dynamically. The 375B-A23B model is the fleet’s most capable option for complex reasoning, software engineering, research, and long-horizon agentic work, while the 32B and 36B-A4B models target powerful local deployment. The 36B-A4B model introduces Mixture-of-Value Attention, combining sparse attention with Mixture-of-Experts layers to activate about 4 billion parameters per token while approaching the performance of the dense 32B model.

About

Trinity Large Thinking is a frontier open source reasoning model developed by Arcee AI, designed specifically for complex, multi-step problem solving and autonomous agent workflows that require long-horizon planning and tool use. Built on a sparse Mixture-of-Experts architecture with roughly 400 billion total parameters but only about 13 billion active per token, the model achieves high efficiency while maintaining strong reasoning performance across tasks such as mathematical problem solving, code generation, and multi-step analysis. It introduces extended chain-of-thought reasoning capabilities, allowing the model to generate intermediate “thinking traces” before producing final answers, which improves accuracy and reliability in complex scenarios. Trinity Large Thinking supports a very large context window of up to 262K tokens, enabling it to process long documents, maintain state across extended interactions, and operate effectively in continuous agent loops.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

AI researchers, developers, and organizations searching for open models for reasoning, coding, tool use, agentic workflows, and deployments

Audience

Developers and enterprises building autonomous AI agents that need a high-performance, open-source reasoning model for complex, multi-step workflows

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

No information available.
Free Version
Free Trial

Pricing

Free
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Institute of Foundation Models
Founded: 2025
United States
ifm.ai/blog/k2/

Company Information

Arcee AI
Founded: 2023
United States
www.arcee.ai/blog/trinity-large-thinking

Alternatives

LongCat-2.0

LongCat-2.0

LongCat

Alternatives

Kimi K2 Thinking

Kimi K2 Thinking

Moonshot AI
MiMo-V2.5-Pro

MiMo-V2.5-Pro

Xiaomi Technology
Ling 3.0 Flash

Ling 3.0 Flash

Ant Group
GLM-5.1

GLM-5.1

Z.ai
Command A+

Command A+

Cohere AI
Hy4

Hy4

Tencent
LongCat-2.0

LongCat-2.0

LongCat

Categories

Categories

Integrations

Claude Fable 5
Claude Fable 5.1
Claude Mythos 5
Claude Mythos 5.1
Claude Opus 4.6
Claude Opus 4.7
Claude Opus 4.8
Claude Opus 5
Claude Opus 5.2
OpenClaw
OpenRouter
Vercel AI Gateway
Visual Studio Code

Integrations

Claude Fable 5
Claude Fable 5.1
Claude Mythos 5
Claude Mythos 5.1
Claude Opus 4.6
Claude Opus 4.7
Claude Opus 4.8
Claude Opus 5
Claude Opus 5.2
OpenClaw
OpenRouter
Vercel AI Gateway
Visual Studio Code
Claim K2 Horizon and update features and information
Claim K2 Horizon and update features and information
Claim Trinity-Large-Thinking and update features and information
Claim Trinity-Large-Thinking and update features and information