Comprehensive side-by-side LLM comparison
Both models show comparable benchmark performance. Grok 3 offers 716.4K more tokens in context window than o4 mini. o4 mini is $12.50 cheaper per million tokens. Both models have their strengths depending on your specific coding needs.
xAI
Grok 3, released by xAI in February 2025, is a large language model trained on xAI's Colossus supercluster with substantially increased compute over previous generations. It features a 1M token context window, RL-enhanced Think mode for extended reasoning, and demonstrated strong results on mathematics, coding, and scientific benchmarks. Grok 3 targets complex reasoning, real-time information tasks via X platform integration, and agentic workflows via the xAI API.
OpenAI
OpenAI o4 mini, released by OpenAI in April 2025, is a compact reasoning model from the o4 family that combines multimodal understanding with efficient chain-of-thought processing. It features a 200K token context window and native image understanding, with strong performance on mathematics and coding benchmarks relative to its inference cost. o4 mini targets cost-sensitive applications requiring both visual reasoning and mathematical accuracy.
1 month newer

Grok 3
xAI
2025-02-17

o4 mini
OpenAI
2025-04-16
Cost per million tokens (USD)
Grok 3
o4 mini
Context window and performance specifications
Average performance across 2 common benchmarks
Grok 3
o4 mini
Performance comparison across key benchmark categories
Grok 3
o4 mini
Available providers and their performance metrics
Grok 3
xAI
o4 mini
Grok 3
o4 mini
Grok 3
o4 mini
OpenAI