Comprehensive side-by-side LLM comparison
o3-pro offers 268.0K more tokens in context window than Phi 4. Phi 4 is $99.79 cheaper per million tokens. 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 was introduced as the fourth generation of Microsoft's small language model series, designed to push the boundaries of what compact models can achieve. Built with advanced training techniques and architectural improvements, it demonstrates continued progress in efficient, high-quality language models.
6 months newer

Phi 4
Microsoft
2024-12-12

o3-pro
OpenAI
2025-06-10
Cost per million tokens (USD)

o3-pro

Phi 4
Context window and performance specifications
o3-pro
2024-05-31
Phi 4
2024-06-01
Available providers and their performance metrics

o3-pro
OpenAI

Phi 4

o3-pro

Phi 4

o3-pro

Phi 4
DeepInfra