Comprehensive side-by-side LLM comparison
Phi 4 Reasoning Plus leads with 17.4% higher average benchmark score. o1-preview is available on 2 providers. Overall, Phi 4 Reasoning Plus 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 Plus was created as an enhanced reasoning variant, designed to provide even deeper analytical capabilities within the Phi-4 family. Built to maximize reasoning quality while maintaining the efficiency benefits of small models, it represents the most capable reasoning-focused option in the Phi-4 series.
7 months newer

o1-preview
OpenAI
2024-09-12

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

o1-preview

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

o1-preview
Azure
OpenAI


o1-preview

Phi 4 Reasoning Plus

o1-preview

Phi 4 Reasoning Plus
Phi 4 Reasoning Plus