GPT-4o vs Phi 4 Reasoning
GPT-4o and Phi 4 Reasoning are closely matched at 14.2 and 12.1 on the LLM Stats Score.
OpenAI · Microsoft · Updated for 2026
Which is better?
GPT-4o and Phi 4 Reasoning are closely matched on the overall LLM Stats Score at 14.2 and 12.1.
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-4o
- you want predictable pricing at $2.50/M input and $10.00/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.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
38 reported for GPT-4o · 11 for Phi 4 Reasoning
GPT-4o outperforms in 2 benchmarks (GPQA, MMLU-Pro), while Phi 4 Reasoning is better at 2 benchmarks (AIME 2024, IFEval).
Both models are evenly matched across the benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only GPT-4o specifies input context (128,000 tokens). Only GPT-4o specifies output context (16,384 tokens).
Input capabilities
Documented input modalities across available providers
GPT-4o supports multimodal inputs, whereas Phi 4 Reasoning does not.
GPT-4o can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-4o
Phi 4 Reasoning
License
Usage and distribution terms
GPT-4o 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.
Proprietary
Closed source
MIT
Open weights
Release Timeline
When each model was launched
GPT-4o was released on 2024-08-06, while Phi 4 Reasoning was released on 2025-04-30.
Phi 4 Reasoning is 9 months newer than GPT-4o.
Aug 6, 2024
2.1 years ago
Apr 30, 2025
1.4 years ago
8mo newerKnowledge Cutoff
When training data ends
Phi 4 Reasoning has a documented knowledge cutoff of 2025-03-01, while GPT-4o's cutoff date is not specified.
We can confirm Phi 4 Reasoning's training data extends to 2025-03-01, but cannot make a direct comparison without GPT-4o's cutoff date.
—
Mar 2025
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-4o and Phi 4 Reasoning side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-4o vs Phi 4 Reasoning.