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K2 Horizon 7B vs Particle-1

Particle-1 leads the LLM Stats Score 31.9 to 25.7.

Institute of Foundation Models · Particle AI · Updated for 2026

Which is better?

Particle-1 leads the overall LLM Stats Score 31.9 to 25.7, ranking #133 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose K2 Horizon 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 want the most recent training data — it shipped Oct 2026

At a glance

The differences that matter most.

K2 Horizon 7B
Institute of Foundation Models
Particle-1
Particle AI
Core performance indexes
LLM Stats Score
25.7
#184
31.9
#133
Reasoning
25.6
#181
31.2
#135
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$0.25 / M
Output price
— / M
$1.00 / M
Context window
—
1,048,576

Individual benchmarks

8 reported for K2 Horizon 7B · 3 for Particle-1

No common benchmarks found

K2 Horizon 7B and Particle-1don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

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).

Institute of Foundation Models
K2 Horizon 7B
Input- tokens
Output- tokens
Particle AI
Particle-1
Input1,048,576 tokens
Output131,072 tokens
Fri Oct 30 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Particle-1 supports multimodal inputs, whereas K2 Horizon 7B does not.

Particle-1 can handle both text and other forms of data like images, making it suitable for multimodal applications.

K2 Horizon 7B

Text
Images
Audio
Video

Particle-1

Text
Images
Audio
Video

License

Usage and distribution terms

K2 Horizon 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.

K2 Horizon 7B

Apache 2.0

Open weights

Particle-1

Proprietary

Closed source

Release Timeline

When each model was launched

K2 Horizon 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 7B.

K2 Horizon 7B

Sep 3, 2026

1 months ago

Particle-1

Oct 28, 2026

1 days ago

1mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against K2 Horizon 7B and Particle-1 side-by-side, then vote on the output you prefer.

K2 Horizon 7B
✓ Preferred
Particle-1
Open in Playground

FAQ

Common questions about K2 Horizon 7B vs Particle-1.

Which is better, K2 Horizon 7B or Particle-1?

Particle-1 leads the LLM Stats Score 31.9 to 25.7. K2 Horizon 7B is made by Institute of Foundation Models and Particle-1 is made by Particle AI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does K2 Horizon 7B compare to Particle-1 in benchmarks?

K2 Horizon 7B scores HMMT Feb 26: 73.3%, SWE-Bench Verified: 70.6%, AA-LCR: 68.0%, BrowseComp: 59.0%, Terminal-Bench 2.1: 39.1%. Particle-1 scores GPQA: 90.4%, BabyVision: 89.2%, MMLU: 86.1%.

What are the context window sizes for K2 Horizon 7B and Particle-1?

K2 Horizon 7B supports an unknown number of tokens and Particle-1 supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between K2 Horizon 7B and Particle-1?

Key differences include LLM Stats Score (25.7 vs 31.9), multimodal support (no vs yes), licensing (Apache 2.0 vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes K2 Horizon 7B and Particle-1?

K2 Horizon 7B is developed by Institute of Foundation Models and Particle-1 is developed by Particle AI.

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