Model Comparison

GPT-5 mini vs Phi 4

GPT-5 mini significantly outperforms across most benchmarks. Phi 4 is 7.9x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

GPT-5 mini outperforms in 1 benchmarks (GPQA), while Phi 4 is better at 0 benchmarks.

GPT-5 mini significantly outperforms across most benchmarks.

Tue May 26 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Phi 4 costs less

For input processing, GPT-5 mini ($0.25/1M tokens) is 3.6x more expensive than Phi 4 ($0.07/1M tokens).

For output processing, GPT-5 mini ($2.00/1M tokens) is 14.3x more expensive than Phi 4 ($0.14/1M tokens).

In conclusion, GPT-5 mini is more expensive than Phi 4.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Tue May 26 2026 • llm-stats.com
OpenAI
GPT-5 mini
Input tokens$0.25
Output tokens$2.00
Best providerOpenAI
Microsoft
Phi 4
Input tokens$0.07
Output tokens$0.14
Best providerDeepinfra
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Context Window

Maximum input and output token capacity

GPT-5 mini accepts 400,000 input tokens compared to Phi 4's 16,000 tokens. GPT-5 mini can generate longer responses up to 128,000 tokens, while Phi 4 is limited to 16,000 tokens.

OpenAI
GPT-5 mini
Input400,000 tokens
Output128,000 tokens
Microsoft
Phi 4
Input16,000 tokens
Output16,000 tokens
Tue May 26 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-5 mini supports multimodal inputs, whereas Phi 4 does not.

GPT-5 mini can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-5 mini

Text
Images
Audio
Video

Phi 4

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5 mini is licensed under a proprietary license, while Phi 4 uses MIT.

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

GPT-5 mini

Proprietary

Closed source

Phi 4

MIT

Open weights

Release Timeline

When each model was launched

GPT-5 mini was released on 2025-08-07, while Phi 4 was released on 2024-12-12.

GPT-5 mini is 8 months newer than Phi 4.

GPT-5 mini

Aug 7, 2025

9 months ago

7mo newer
Phi 4

Dec 12, 2024

1.5 years ago

Knowledge Cutoff

When training data ends

GPT-5 mini has a knowledge cutoff of 2024-05-30, while Phi 4 has a cutoff of 2024-06-01.

Phi 4 has more recent training data (up to 2024-06-01), making it potentially better informed about events through that date compared to GPT-5 mini (2024-05-30).

GPT-5 mini

May 2024

Phi 4

Jun 2024

1 mo newer

Provider Availability

GPT-5 mini is available from OpenAI. Phi 4 is available from DeepInfra.

GPT-5 mini

openai logo
OpenAI
Input Price:Input: $0.25/1MOutput Price:Output: $2.00/1M

Phi 4

deepinfra logo
Deepinfra
Input Price:Input: $0.07/1MOutput Price:Output: $0.14/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (400,000 tokens)
Supports multimodal inputs
Higher GPQA score (82.3% vs 56.1%)
Microsoft
Less expensive input tokens
Less expensive output tokens
Has open weights

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5 mini
Microsoft
Phi 4

FAQ

Common questions about GPT-5 mini vs Phi 4.

Which is better, GPT-5 mini or Phi 4?

GPT-5 mini significantly outperforms across most benchmarks. GPT-5 mini is made by OpenAI and Phi 4 is made by Microsoft. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-5 mini compare to Phi 4 in benchmarks?

GPT-5 mini scores AIME 2025: 91.1%, HMMT 2025: 87.8%, GPQA: 82.3%, FrontierMath: 22.1%, Humanity's Last Exam: 16.7%. Phi 4 scores MMLU: 84.8%, HumanEval+: 82.8%, HumanEval: 82.6%, MGSM: 80.6%, MATH: 80.4%.

Is GPT-5 mini cheaper than Phi 4?

Phi 4 is 3.6x cheaper for input tokens. GPT-5 mini costs $0.25/M input and $2.00/M output via openai. Phi 4 costs $0.07/M input and $0.14/M output via deepinfra.

What are the context window sizes for GPT-5 mini and Phi 4?

GPT-5 mini supports 400K tokens and Phi 4 supports 16K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-5 mini and Phi 4?

Key differences include context window (400K vs 16K), input pricing ($0.25 vs $0.07/M), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5 mini and Phi 4?

GPT-5 mini is developed by OpenAI and Phi 4 is developed by Microsoft.