Question 1

What is the difference between xAI: Grok 4 and Claude Sonnet 4?

Accepted Answer

xAI: Grok 4 is developed by xAI while Claude Sonnet 4 is developed by Anthropic. xAI: Grok 4 has a 256K token context window vs Claude Sonnet 4's 200K. in 26 community votes on RIVAL, Claude Sonnet 4 wins 65% of head-to-head matchups. These results are based on blind head-to-head voting across 27 challenges.

Question 2

Which is better, xAI: Grok 4 or Claude Sonnet 4?

Accepted Answer

Based on 26 community votes on RIVAL, Claude Sonnet 4 wins 65% of head-to-head matchups against xAI: Grok 4. Claude Sonnet 4 is strongest in Image Generation. However, xAI: Grok 4 leads in Web Design.

Question 3

How much does xAI: Grok 4 cost compared to Claude Sonnet 4?

Accepted Answer

xAI: Grok 4 costs $3/M input tokens and Claude Sonnet 4 costs $3/M input tokens. Claude Sonnet 4 is $0.00/M cheaper per input. Claude Sonnet 4 also wins more often in community votes, making it the better value.

Question 4

How are xAI: Grok 4 vs Claude Sonnet 4 votes collected on RIVAL?

Accepted Answer

RIVAL presents both models' outputs side-by-side in blind duels — voters see the responses but don't know which model produced each one. This eliminates brand bias. 26 votes have been collected for this pair across 27 challenges. All vote data is part of RIVAL's open dataset.