Comprehensive side-by-side LLM comparison
o3-pro offers 164.0K more tokens in context window than Grok-3. Grok-3 is $82.00 cheaper per million tokens. Both models have their strengths depending on your specific coding needs.
xAI
Grok 3 was introduced as xAI's third-generation flagship model, designed to push the boundaries of reasoning, factual accuracy, and helpful assistance. Built to advance the state of AI capabilities, it incorporates improvements across language understanding, generation, and analytical thinking.
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.
3 months newer

Grok-3
xAI
2025-02-17

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

Grok-3

o3-pro
Context window and performance specifications
o3-pro
2024-05-31
Grok-3
2024-11-17
Available providers and their performance metrics

Grok-3
xAI

o3-pro

Grok-3

o3-pro

Grok-3

o3-pro
OpenAI