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K2 Horizon 0.9B vs Phi 4 Mini

K2 Horizon 0.9B leads the LLM Stats Score 0.5 to -4.6.

Institute of Foundation Models · Microsoft · Updated for 2026

Which is better?

K2 Horizon 0.9B leads the overall LLM Stats Score 0.5 to -4.6, ranking #358 overall.

In the 1 individual benchmarks reported for both models, K2 Horizon 0.9B 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 0.9B

  • overall performance matters — it scores 0.5 and ranks #358 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 Sep 2026

Choose Phi 4 Mini

  • you are already invested in the Microsoft ecosystem

At a glance

The differences that matter most.

K2 Horizon 0.9B
Institute of Foundation Models
Phi 4 Mini
Microsoft
Core performance indexes
LLM Stats Score
0.5
#358
-4.6
#384
Reasoning
0.6
#350
-4.6
#377
Cost, coverage & limits
Benchmark wins
1 of 1
0 of 1
Input price
— / M
— / M
Output price
— / M
— / M
Context window
—
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
K2 Horizon 0.9B
Phi 4 Mini
Math
3.3#308
2.2#314
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

8 reported for K2 Horizon 0.9B · 17 for Phi 4 Mini

1 shared

K2 Horizon 0.9B outperforms in 1 benchmarks (GPQA), while Phi 4 Mini is better at 0 benchmarks.

K2 Horizon 0.9B significantly outperforms across most benchmarks.

Fri Oct 30 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Model Size

Parameter count comparison

2.9B diff

Phi 4 Mini has 2.9B more parameters than K2 Horizon 0.9B, making it 326.7% larger.

Institute of Foundation Models
K2 Horizon 0.9B
900,000,000parameters
Microsoft
Phi 4 Mini
3.8Bparameters
0.9B
K2 Horizon 0.9B
3.8B
Phi 4 Mini

License

Usage and distribution terms

K2 Horizon 0.9B is licensed under Apache 2.0, while Phi 4 Mini uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

K2 Horizon 0.9B

Apache 2.0

Open weights

Phi 4 Mini

MIT

Open weights

Release Timeline

When each model was launched

K2 Horizon 0.9B was released on 2026-09-03, while Phi 4 Mini was released on 2025-02-01.

K2 Horizon 0.9B is 19 months newer than Phi 4 Mini.

K2 Horizon 0.9B

Sep 3, 2026

1 months ago

1.6yr newer
Phi 4 Mini

Feb 1, 2025

1.7 years ago

Knowledge Cutoff

When training data ends

Phi 4 Mini has a documented knowledge cutoff of 2024-06-01, while K2 Horizon 0.9B's cutoff date is not specified.

We can confirm Phi 4 Mini's training data extends to 2024-06-01, but cannot make a direct comparison without K2 Horizon 0.9B's cutoff date.

K2 Horizon 0.9B

—

Phi 4 Mini

Jun 2024

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against K2 Horizon 0.9B and Phi 4 Mini side-by-side, then vote on the output you prefer.

K2 Horizon 0.9B
✓ Preferred
Phi 4 Mini
Open in Playground

FAQ

Common questions about K2 Horizon 0.9B vs Phi 4 Mini.

Which is better, K2 Horizon 0.9B or Phi 4 Mini?

K2 Horizon 0.9B leads the LLM Stats Score 0.5 to -4.6. K2 Horizon 0.9B is made by Institute of Foundation Models and Phi 4 Mini is made by Microsoft. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does K2 Horizon 0.9B compare to Phi 4 Mini in benchmarks?

K2 Horizon 0.9B scores HumanEval+: 79.9%, MBPP+: 68.0%, AIME 2026: 48.5%, AIME 2025: 41.7%, LiveCodeBench v6: 37.4%. Phi 4 Mini scores GSM8k: 88.6%, ARC-C: 83.7%, BoolQ: 81.2%, OpenBookQA: 79.2%, PIQA: 77.6%.

What are the main differences between K2 Horizon 0.9B and Phi 4 Mini?

Key differences include LLM Stats Score (0.5 vs -4.6), licensing (Apache 2.0 vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes K2 Horizon 0.9B and Phi 4 Mini?

K2 Horizon 0.9B is developed by Institute of Foundation Models and Phi 4 Mini is developed by Microsoft.

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