Model Comparison

GPT-4o vs Phi 4

GPT-4o significantly outperforms across most benchmarks. Phi 4 is 50.0x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

GPT-4o outperforms in 5 benchmarks (GPQA, IFEval, MMLU, MMLU-Pro, SimpleQA), while Phi 4 is better at 0 benchmarks.

GPT-4o significantly outperforms across most benchmarks.

Fri Apr 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Phi 4 costs less

For input processing, GPT-4o ($2.50/1M tokens) is 35.7x more expensive than Phi 4 ($0.07/1M tokens).

For output processing, GPT-4o ($10.00/1M tokens) is 71.4x more expensive than Phi 4 ($0.14/1M tokens).

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

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

Lowest available price from all providers
Fri Apr 17 2026 • llm-stats.com
OpenAI
GPT-4o
Input tokens$2.50
Output tokens$10.00
Best providerAzure
Microsoft
Phi 4
Input tokens$0.07
Output tokens$0.14
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-4o accepts 128,000 input tokens compared to Phi 4's 16,000 tokens. GPT-4o can generate longer responses up to 16,384 tokens, while Phi 4 is limited to 16,000 tokens.

OpenAI
GPT-4o
Input128,000 tokens
Output16,384 tokens
Microsoft
Phi 4
Input16,000 tokens
Output16,000 tokens
Fri Apr 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

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

GPT-4o can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-4o

Text
Images
Audio
Video

Phi 4

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-4o 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-4o

Proprietary

Closed source

Phi 4

MIT

Open weights

Release Timeline

When each model was launched

GPT-4o was released on 2024-08-06, while Phi 4 was released on 2024-12-12.

Phi 4 is 4 months newer than GPT-4o.

GPT-4o

Aug 6, 2024

1.7 years ago

Phi 4

Dec 12, 2024

1.3 years ago

4mo newer

Knowledge Cutoff

When training data ends

Phi 4 has a documented knowledge cutoff of 2024-06-01, while GPT-4o's cutoff date is not specified.

We can confirm Phi 4's training data extends to 2024-06-01, but cannot make a direct comparison without GPT-4o's cutoff date.

GPT-4o

—

Phi 4

Jun 2024

Provider Availability

GPT-4o is available from Azure, OpenAI. Phi 4 is available from DeepInfra.

GPT-4o

azure logo
Azure
Input Price:Input: $2.50/1MOutput Price:Output: $10.00/1M
openai logo
OpenAI
Input Price:Input: $2.50/1MOutput Price:Output: $10.00/1M

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 (128,000 tokens)
Supports multimodal inputs
Higher GPQA score (70.1% vs 56.1%)
Higher IFEval score (81.0% vs 63.0%)
Higher MMLU score (85.7% vs 84.8%)
Higher MMLU-Pro score (74.7% vs 70.4%)
Higher SimpleQA score (38.2% vs 3.0%)
Microsoft
Less expensive input tokens
Less expensive output tokens
Has open weights

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-4o
Microsoft
Phi 4

FAQ

Common questions about GPT-4o vs Phi 4

GPT-4o significantly outperforms across most benchmarks. GPT-4o 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.
GPT-4o scores AI2D: 94.2%, DocVQA: 92.8%, ChartQA: 85.7%, MMLU: 85.7%, CharXiv-D: 85.3%. Phi 4 scores MMLU: 84.8%, HumanEval+: 82.8%, HumanEval: 82.6%, MGSM: 80.6%, MATH: 80.4%.
Phi 4 is 35.7x cheaper for input tokens. GPT-4o costs $2.50/M input and $10.00/M output via azure. Phi 4 costs $0.07/M input and $0.14/M output via deepinfra.
GPT-4o supports 128K tokens and Phi 4 supports 16K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (128K vs 16K), input pricing ($2.50 vs $0.07/M), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.
GPT-4o is developed by OpenAI and Phi 4 is developed by Microsoft.