Comprehensive side-by-side LLM comparison
o3-pro supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
OpenAI
o3-pro was developed as the flagship reasoning model in the o3 family, designed to deliver maximum reasoning depth and reliability for the most challenging analytical tasks. Built for professionals requiring the highest level of thoughtful problem-solving, it extends reasoning capabilities to handle complex multi-step challenges across diverse domains.
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.
1 month newer

Phi 4 Reasoning Plus
Microsoft
2025-04-30

o3-pro
OpenAI
2025-06-10
Context window and performance specifications
o3-pro
2024-05-31
Phi 4 Reasoning Plus
2025-03-01
Available providers and their performance metrics

o3-pro
OpenAI

Phi 4 Reasoning Plus

o3-pro

Phi 4 Reasoning Plus

o3-pro

Phi 4 Reasoning Plus