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GPT-4.1 vs Phi 4 Reasoning

GPT-4.1 and Phi 4 Reasoning are closely matched at 18.0 and 12.0 on the LLM Stats Score.

OpenAI · Microsoft · Updated for 2026

Which is better?

GPT-4.1 and Phi 4 Reasoning are closely matched on the overall LLM Stats Score at 18.0 and 12.0.

The models split the 4 individual benchmarks reported for both models evenly.

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

Choose GPT-4.1

  • you want predictable pricing at $2.00/M input and $8.00/M output

Choose Phi 4 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.

GPT-4.1
OpenAI
Phi 4 Reasoning
Microsoft
Core performance indexes
LLM Stats Score
18.0
#232
12.0
#270
Reasoning
18.4
#223
12.6
#259
Coding
4.9
#218
6.3
#204
Cost, coverage & limits
Benchmark wins
2 of 4
2 of 4
Input price
$2.00 / M
— / M
Output price
$8.00 / M
— / M
Context window
1,047,576
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
GPT-4.1
Phi 4 Reasoning
Math
16.3#213
13.6#232
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

29 reported for GPT-4.1 · 11 for Phi 4 Reasoning

4 shared

GPT-4.1 outperforms in 2 benchmarks (GPQA, IFEval), while Phi 4 Reasoning is better at 2 benchmarks (AIME 2024, AIME 2025).

Both models are evenly matched across the benchmarks.

Thu Oct 08 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only GPT-4.1 specifies input context (1,047,576 tokens). Only GPT-4.1 specifies output context (32,768 tokens).

OpenAI
GPT-4.1
Input1,047,576 tokens
Output32,768 tokens
Microsoft
Phi 4 Reasoning
Input- tokens
Output- tokens
Thu Oct 08 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

GPT-4.1 supports multimodal inputs, whereas Phi 4 Reasoning does not.

GPT-4.1 can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-4.1

Text
Images
Audio
Video

Phi 4 Reasoning

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-4.1 is licensed under a proprietary license, while Phi 4 Reasoning uses MIT.

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

GPT-4.1

Proprietary

Closed source

Phi 4 Reasoning

MIT

Open weights

Release Timeline

When each model was launched

GPT-4.1 was released on 2025-04-14, while Phi 4 Reasoning was released on 2025-04-30.

Phi 4 Reasoning is 1 month newer than GPT-4.1.

GPT-4.1

Apr 14, 2025

1.5 years ago

Phi 4 Reasoning

Apr 30, 2025

1.4 years ago

2w newer

Knowledge Cutoff

When training data ends

GPT-4.1 has a knowledge cutoff of 2024-06-01, while Phi 4 Reasoning has a cutoff of 2025-03-01.

Phi 4 Reasoning has more recent training data (up to 2025-03-01), making it potentially better informed about events through that date compared to GPT-4.1 (2024-06-01).

GPT-4.1

Jun 2024

Phi 4 Reasoning

Mar 2025

9 mo newer

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against GPT-4.1 and Phi 4 Reasoning side-by-side, then vote on the output you prefer.

GPT-4.1
✓ Preferred
Phi 4 Reasoning
Open in Playground

FAQ

Common questions about GPT-4.1 vs Phi 4 Reasoning.

Which is better, GPT-4.1 or Phi 4 Reasoning?

GPT-4.1 and Phi 4 Reasoning are closely matched on the LLM Stats Score at 18.0 and 12.0. GPT-4.1 is made by OpenAI and Phi 4 Reasoning is made by Microsoft. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does GPT-4.1 compare to Phi 4 Reasoning in benchmarks?

GPT-4.1 scores MMLU: 90.2%, CharXiv-D: 87.9%, IFEval: 87.4%, MMMLU: 87.3%, MMMU: 74.8%. Phi 4 Reasoning scores FlenQA: 97.7%, HumanEval+: 92.9%, IFEval: 83.4%, OmniMath: 76.6%, AIME 2024: 75.3%.

What are the context window sizes for GPT-4.1 and Phi 4 Reasoning?

GPT-4.1 supports 1.0M tokens and Phi 4 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 GPT-4.1 and Phi 4 Reasoning?

Key differences include LLM Stats Score (18.0 vs 12.0), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-4.1 and Phi 4 Reasoning?

GPT-4.1 is developed by OpenAI and Phi 4 Reasoning is developed by Microsoft.

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