Comprehensive side-by-side LLM comparison
Grok-4 Heavy leads with 21.2% higher average benchmark score. Claude Sonnet 4 is available on 4 providers. Overall, Grok-4 Heavy is the stronger choice for coding tasks.
Anthropic
Claude Sonnet 4 was created as the balanced offering in the Claude 4 family, designed to provide strong intelligence with practical speed and cost efficiency. Built to serve as a versatile workhorse for diverse applications, it balances advanced capabilities with operational considerations for everyday enterprise and consumer use.
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.
1 month newer

Claude Sonnet 4
Anthropic
2025-05-22

Grok-4 Heavy
xAI
2025-07-09
Context window and performance specifications
Average performance across 2 common benchmarks

Claude Sonnet 4

Grok-4 Heavy
Grok-4 Heavy
2024-12-31
Available providers and their performance metrics

Claude Sonnet 4
Anthropic
Bedrock
ZeroEval

Claude Sonnet 4

Grok-4 Heavy

Claude Sonnet 4

Grok-4 Heavy

Grok-4 Heavy