Grok Code Fast 1
Nothing here. The model returned empty. We stared at it for a while.
Grok Code Fast 1 vs Claude Sonnet 4
Compare Grok Code Fast 1 by xAI against Claude Sonnet 4 by Anthropic, in 203 community votes, claude sonnet 4 wins 68% of head-to-head duels, context windows of 256K vs 200K, tested across 34 shared challenges. Updated April 2026.
Which is better, Grok Code Fast 1 or Claude Sonnet 4?
Claude Sonnet 4 is the better choice overall, winning 68% of 203 blind community votes on Rival. Grok Code Fast 1 costs $0.2/M input tokens vs $3/M for Claude Sonnet 4. Context windows: 256K vs 200K tokens. Compare their real outputs side by side below.
Key Differences Between Grok Code Fast 1 and Claude Sonnet 4
Grok Code Fast 1 is made by xai while Claude Sonnet 4 is from anthropic. Grok Code Fast 1 has a 256K token context window compared to Claude Sonnet 4's 200K. On pricing, Grok Code Fast 1 costs $0.2/M input tokens vs $3/M for Claude Sonnet 4. In community voting, In 203 community votes, Claude Sonnet 4 wins 68% of head-to-head duels.
In 203 community votes, Claude Sonnet 4 wins 68% of head-to-head duels. Grok Code Fast 1 leads in Reasoning, Analysis, while Claude Sonnet 4 leads in Web Design, Image Generation, Conversation. Based on blind community voting from the Rival open dataset of 203+ human preference judgments for this pair.
Web Design: Claude Sonnet 4 wins 59% of votes
Image Generation: Claude Sonnet 4 wins 94% of votes
Reasoning: Grok Code Fast 1 wins 73% of votes
Analysis: Grok Code Fast 1 wins 56% of votes
Conversation: Claude Sonnet 4 wins 83% of votes
Our Verdict
Claude Sonnet 4Winner
Grok Code Fast 1Runner-up
Pick Claude Sonnet 4. In 203 blind votes, Claude Sonnet 4 wins 68% of the time. That's not luck.
Pick Grok Code Fast 1 for Reasoning, Analysis. Pick Claude Sonnet 4 for Image Generation, Conversation, Web Design. Grok Code Fast 1 is 10x cheaper per token — worth considering if cost matters.
Clear winner
Writing DNA
Style Comparison
Similarity
85%
Claude Sonnet 4 uses 14.7x more emoji
Grok Code Fast 1
Claude Sonnet 4
60%Vocabulary62%
17wSentence Length111w
0.97Hedging0.40
2.8Bold5.0
2.5Lists9.3
0.06Emoji0.88
0.89Headings2.16
0.11Transitions0.33
Based on 23 + 17 text responses
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