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o4-mini vs Phi 4 Mini Reasoning

o4-mini significantly outperforms across most benchmarks.

OpenAI · Microsoft · Updated for 2026

Which is better?

o4-mini outperforms in 1 benchmarks (GPQA), while Phi 4 Mini Reasoning is better at 0 benchmarks. o4-mini significantly outperforms across most benchmarks.

Based on current benchmark, pricing, and model metadata for 2026.

Choose o4-mini

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks

Choose Phi 4 Mini Reasoning

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

At a glance

The differences that matter most.

o4-mini
OpenAI
Phi 4 Mini Reasoning
Microsoft
Benchmark wins
1 of 1
0 of 1
Input price
$1.10 / M
— / M
Output price
$4.40 / M
— / M
Context window
200,000
—
Released
Apr 2025
Apr 2025
License
Proprietary
MIT

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

o4-mini outperforms in 1 benchmarks (GPQA), while Phi 4 Mini Reasoning is better at 0 benchmarks.

o4-mini significantly outperforms across most benchmarks.

Tue Aug 25 2026 • llm-stats.com

Arena Performance

Playground indexes and blind preference scores

Context Window

Maximum input and output token capacity

Only o4-mini specifies input context (200,000 tokens). Only o4-mini specifies output context (100,000 tokens).

OpenAI
o4-mini
Input200,000 tokens
Output100,000 tokens
Microsoft
Phi 4 Mini Reasoning
Input- tokens
Output- tokens
Tue Aug 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

o4-mini supports multimodal inputs, whereas Phi 4 Mini Reasoning does not.

o4-mini can handle both text and other forms of data like images, making it suitable for multimodal applications.

o4-mini

Text
Images
Audio
Video

Phi 4 Mini Reasoning

Text
Images
Audio
Video

License

Usage and distribution terms

o4-mini is licensed under a proprietary license, while Phi 4 Mini Reasoning uses MIT.

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

o4-mini

Proprietary

Closed source

Phi 4 Mini Reasoning

MIT

Open weights

Release Timeline

When each model was launched

o4-mini was released on 2025-04-16, while Phi 4 Mini Reasoning was released on 2025-04-30.

Phi 4 Mini Reasoning is 0 month newer than o4-mini.

o4-mini

Apr 16, 2025

1.4 years ago

Phi 4 Mini Reasoning

Apr 30, 2025

1.3 years ago

2w newer

Knowledge Cutoff

When training data ends

o4-mini has a knowledge cutoff of 2024-05-31, while Phi 4 Mini Reasoning has a cutoff of 2025-02-01.

Phi 4 Mini Reasoning has more recent training data (up to 2025-02-01), making it potentially better informed about events through that date compared to o4-mini (2024-05-31).

o4-mini

May 2024

Phi 4 Mini Reasoning

Feb 2025

9 mo newer

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against o4-mini and Phi 4 Mini Reasoning side-by-side, then vote on the output you prefer.

o4-mini
✓ Preferred
Phi 4 Mini Reasoning
Open in Playground

FAQ

Common questions about o4-mini vs Phi 4 Mini Reasoning.

Which is better, o4-mini or Phi 4 Mini Reasoning?

o4-mini significantly outperforms across most benchmarks. o4-mini is made by OpenAI and Phi 4 Mini Reasoning is made by Microsoft. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does o4-mini compare to Phi 4 Mini Reasoning in benchmarks?

o4-mini scores AIME 2024: 93.4%, AIME 2025: 92.7%, MathVista: 84.3%, MMMU: 81.6%, GPQA: 81.4%. Phi 4 Mini Reasoning scores MATH-500: 94.6%, AIME: 57.5%, GPQA: 52.0%.

What are the context window sizes for o4-mini and Phi 4 Mini Reasoning?

o4-mini supports 200K tokens and Phi 4 Mini Reasoning supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between o4-mini and Phi 4 Mini Reasoning?

Key differences include multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes o4-mini and Phi 4 Mini Reasoning?

o4-mini is developed by OpenAI and Phi 4 Mini Reasoning is developed by Microsoft.

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