Comprehensive side-by-side LLM comparison
Grok-4 Heavy leads with 28.4% higher average benchmark score. Grok-4 Heavy supports multimodal inputs. Overall, Grok-4 Heavy is the stronger choice for coding tasks.
xAI
Grok 4 Heavy was created as a larger, more capable variant of Grok 4, designed to provide maximum reasoning depth and analytical capability. Built for the most demanding applications requiring sophisticated problem-solving, it represents xAI's flagship offering in the fourth generation.
Microsoft
Phi-4 Reasoning was developed to incorporate extended analytical thinking into the Phi-4 architecture, designed to spend more time on complex problem-solving. Built to combine compact model efficiency with reasoning depth, it represents Microsoft's exploration of thoughtful small models.
2 months newer

Phi 4 Reasoning
Microsoft
2025-04-30

Grok-4 Heavy
xAI
2025-07-09
Average performance across 3 common benchmarks

Grok-4 Heavy

Phi 4 Reasoning
Grok-4 Heavy
2024-12-31
Phi 4 Reasoning
2025-03-01
Available providers and their performance metrics

Grok-4 Heavy

Phi 4 Reasoning

Grok-4 Heavy

Phi 4 Reasoning