K2 Horizon 3.7B vs Particle-1
Particle-1 leads the LLM Stats Score 31.9 to 21.4.
Institute of Foundation Models · Particle AI · Updated for 2026
Which is better?
Particle-1 leads the overall LLM Stats Score 31.9 to 21.4, ranking #133 overall.
In the 1 individual benchmarks reported for both models, Particle-1 wins 1; this is a narrower head-to-head signal than the composite indexes.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose K2 Horizon 3.7B
- you need open weights you can self-host or fine-tune
Choose Particle-1
- overall performance matters — it scores 31.9 and ranks #133 on LLM Stats
- your work emphasizes reasoning — it leads those capability indexes
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
- you want the most recent training data — it shipped Oct 2026
At a glance
The differences that matter most.
Individual benchmarks
8 reported for K2 Horizon 3.7B · 3 for Particle-1
K2 Horizon 3.7B outperforms in 0 benchmarks, while Particle-1 is better at 1 benchmark (GPQA).
Particle-1 significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only Particle-1 specifies input context (1,048,576 tokens). Only Particle-1 specifies output context (131,072 tokens).
Input capabilities
Documented input modalities across available providers
Particle-1 supports multimodal inputs, whereas K2 Horizon 3.7B does not.
Particle-1 can handle both text and other forms of data like images, making it suitable for multimodal applications.
K2 Horizon 3.7B
Particle-1
License
Usage and distribution terms
K2 Horizon 3.7B is licensed under Apache 2.0, while Particle-1 uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
Apache 2.0
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
K2 Horizon 3.7B was released on 2026-09-03, while Particle-1 was released on 2026-10-28.
Particle-1 is 2 months newer than K2 Horizon 3.7B.
Sep 3, 2026
1 months ago
Oct 28, 2026
-1 days ago
1mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Outputs Comparison
Judge for yourself.
Run your own prompts against K2 Horizon 3.7B and Particle-1 side-by-side, then vote on the output you prefer.
FAQ
Common questions about K2 Horizon 3.7B vs Particle-1.