Comprehensive side-by-side LLM comparison
Both models show comparable benchmark performance. o3 mini offers 160.7K more tokens in context window than Grok 2. o3 mini is $6.50 cheaper per million tokens. Grok 2 supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
xAI
Grok 2, released by xAI in August 2024, is a large language model with 131K token context window and native image understanding, developed with access to real-time information from the X platform. It features multimodal input capabilities and improved reasoning over its predecessor. Grok 2 targets conversational assistants, image analysis, and real-time information retrieval tasks via the xAI API.
OpenAI
OpenAI o3 mini, released by OpenAI in January 2025, is a compact reasoning model from the o3 family designed for efficient, cost-effective STEM problem-solving. It features a 200K token context window and adjustable chain-of-thought effort settings, allowing developers to trade reasoning depth for speed. o3 mini targets science, mathematics, and coding applications where lower inference cost and faster response times are a priority.
5 months newer

Grok 2
xAI
2024-08-14

o3 mini
OpenAI
2025-01-31
Cost per million tokens (USD)
Grok 2
o3 mini
Context window and performance specifications
Average performance across 1 common benchmarks
Grok 2
o3 mini
Performance comparison across key benchmark categories
Grok 2
o3 mini
Available providers and their performance metrics
Grok 2
xAI
o3 mini
Grok 2
o3 mini
Grok 2
o3 mini
OpenAI