Model Comparison

GPT-4.1 vs Phi 4 Reasoning

Both models are evenly matched across the benchmarks.

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Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

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.

Tue May 26 2026 • llm-stats.com

Arena Performance

Human preference votes

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
Tue May 26 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

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

1.1 years ago

Phi 4 Reasoning

Apr 30, 2025

1.1 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

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Key Takeaways

OpenAI
Larger context window (1,047,576 tokens)
Supports multimodal inputs
Higher GPQA score (66.3% vs 65.8%)
Higher IFEval score (87.4% vs 83.4%)
Microsoft
Has open weights
Higher AIME 2024 score (75.3% vs 48.1%)
Higher AIME 2025 score (62.9% vs 46.4%)
OpenAIGPT-4.1
MicrosoftPhi 4 Reasoning
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-4.1
Microsoft
Phi 4 Reasoning

FAQ

Common questions about GPT-4.1 vs Phi 4 Reasoning.

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

Both models are evenly matched across the benchmarks. 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 benchmark scores, pricing, and capabilities 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 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.