Comprehensive side-by-side LLM comparison
Phi 4 Reasoning leads with 12.9% higher average benchmark score. o1-preview is available on 2 providers. Overall, Phi 4 Reasoning is the stronger choice for coding tasks.
OpenAI
o1-preview was introduced as an early version of OpenAI's reasoning model series, designed to demonstrate the potential of AI models that engage in extended thinking before responding. Built to solve complex problems through deliberate reasoning processes, it represented an initial step toward more thoughtful and analytical AI systems.
Microsoft
Phi-4 Reasoning was developed to incorporate extended analytical thinking into the Phi-4 architecture, designed to spend more time on complex problem-solving. Built to combine compact model efficiency with reasoning depth, it represents Microsoft's exploration of thoughtful small models.
7 months newer

o1-preview
OpenAI
2024-09-12

Phi 4 Reasoning
Microsoft
2025-04-30
Context window and performance specifications
Average performance across 2 common benchmarks

o1-preview

Phi 4 Reasoning
Phi 4 Reasoning
2025-03-01
Available providers and their performance metrics

o1-preview
Azure
OpenAI


o1-preview

Phi 4 Reasoning

o1-preview

Phi 4 Reasoning
Phi 4 Reasoning