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Grok-1.5 vs Phi 4 Mini

Grok-1.5 and Phi 4 Mini are closely matched at -2.6 and -4.1 on the LLM Stats Score.

xAI · Microsoft · Updated for 2026

Which is better?

Grok-1.5 and Phi 4 Mini are closely matched on the overall LLM Stats Score at -2.6 and -4.1.

In the 5 individual benchmarks reported for both models, Grok-1.5 wins 3; 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 Grok-1.5

  • you value its reported benchmark strengths — it wins 3 of 5 exact shared results

Choose Phi 4 Mini

  • you want the most recent training data — it shipped Feb 2025
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Grok-1.5
xAI
Phi 4 Mini
Microsoft
Core performance indexes
LLM Stats Score
-2.6
#348
-4.1
#355
Reasoning
-2.2
#338
-4.2
#348
Cost, coverage & limits
Benchmark wins
3 of 5
2 of 5
Input price
— / M
— / M
Output price
— / M
— / M
Context window
—
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Grok-1.5
Phi 4 Mini
Math
4.9#278
2.3#295
Finance
4.7#174
1.1#192
Legal
4.7#160
1.1#181
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

9 reported for Grok-1.5 · 17 for Phi 4 Mini

5 shared

Grok-1.5 outperforms in 3 benchmarks (GPQA, GSM8k, MMLU), while Phi 4 Mini is better at 2 benchmarks (MATH, MMLU-Pro).

Grok-1.5 has a slight edge in benchmark performance.

Thu Oct 01 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

License

Usage and distribution terms

Grok-1.5 is licensed under a proprietary license, while Phi 4 Mini uses MIT.

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

Grok-1.5

Proprietary

Closed source

Phi 4 Mini

MIT

Open weights

Release Timeline

When each model was launched

Grok-1.5 was released on 2024-03-28, while Phi 4 Mini was released on 2025-02-01.

Phi 4 Mini is 10 months newer than Grok-1.5.

Grok-1.5

Mar 28, 2024

2.5 years ago

Phi 4 Mini

Feb 1, 2025

1.7 years ago

10mo newer

Knowledge Cutoff

When training data ends

Phi 4 Mini has a documented knowledge cutoff of 2024-06-01, while Grok-1.5'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 Grok-1.5's cutoff date.

Grok-1.5

—

Phi 4 Mini

Jun 2024

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Grok-1.5 and Phi 4 Mini side-by-side, then vote on the output you prefer.

Grok-1.5
✓ Preferred
Phi 4 Mini
Open in Playground

FAQ

Common questions about Grok-1.5 vs Phi 4 Mini.

Which is better, Grok-1.5 or Phi 4 Mini?

Grok-1.5 and Phi 4 Mini are closely matched on the LLM Stats Score at -2.6 and -4.1. Grok-1.5 is made by xAI 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 Grok-1.5 compare to Phi 4 Mini in benchmarks?

Grok-1.5 scores GSM8k: 90.0%, DocVQA: 85.6%, MMLU: 81.3%, HumanEval: 74.1%, MMMU: 53.6%. 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 Grok-1.5 and Phi 4 Mini?

Key differences include LLM Stats Score (-2.6 vs -4.1), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok-1.5 and Phi 4 Mini?

Grok-1.5 is developed by xAI and Phi 4 Mini is developed by Microsoft.

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