Compare Claude 3.7 Sonnet by Anthropic against Grok Code Fast 1 by xAI, in 19 community votes, claude 3.7 sonnet wins 62% of head-to-head duels, context windows of 200K vs 256K, tested across 55 shared challenges. Updated April 2026.
Claude 3.7 Sonnet is the better choice overall, winning 62% of 19 blind community votes on Rival. Claude 3.7 Sonnet costs $3/M input tokens vs $0.2/M for Grok Code Fast 1. Context windows: 200K vs 256K tokens. Compare their real outputs side by side below.
Claude 3.7 Sonnet is made by anthropic while Grok Code Fast 1 is from xai. Claude 3.7 Sonnet has a 200K token context window compared to Grok Code Fast 1's 256K. On pricing, Claude 3.7 Sonnet costs $3/M input tokens vs $0.2/M for Grok Code Fast 1. In community voting, In 19 community votes, Claude 3.7 Sonnet wins 62% of head-to-head duels.
In 19 community votes, Claude 3.7 Sonnet wins 62% of head-to-head duels. Claude 3.7 Sonnet leads in Web Design, Image Generation, while Grok Code Fast 1 leads in Reasoning, Analysis. Based on blind community voting from the Rival open dataset of 19+ human preference judgments for this pair.
Pick Claude 3.7 Sonnet. In 19 blind votes, Claude 3.7 Sonnet wins 62% of the time. That's not luck.
Pick Claude 3.7 Sonnet for Web Design, Image Generation. Pick Grok Code Fast 1 for Analysis, Reasoning. Grok Code Fast 1 is 10x cheaper per token — worth considering if cost matters.
Grok Code Fast 1 uses 6.0x more emoji
Ask them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.

Compare Claude 3.7 Sonnet by Anthropic against Grok Code Fast 1 by xAI, in 19 community votes, claude 3.7 sonnet wins 62% of head-to-head duels, context windows of 200K vs 256K, tested across 55 shared challenges. Updated April 2026.
Claude 3.7 Sonnet is the better choice overall, winning 62% of 19 blind community votes on Rival. Claude 3.7 Sonnet costs $3/M input tokens vs $0.2/M for Grok Code Fast 1. Context windows: 200K vs 256K tokens. Compare their real outputs side by side below.
Claude 3.7 Sonnet is made by anthropic while Grok Code Fast 1 is from xai. Claude 3.7 Sonnet has a 200K token context window compared to Grok Code Fast 1's 256K. On pricing, Claude 3.7 Sonnet costs $3/M input tokens vs $0.2/M for Grok Code Fast 1. In community voting, In 19 community votes, Claude 3.7 Sonnet wins 62% of head-to-head duels.
In 19 community votes, Claude 3.7 Sonnet wins 62% of head-to-head duels. Claude 3.7 Sonnet leads in Web Design, Image Generation, while Grok Code Fast 1 leads in Reasoning, Analysis. Based on blind community voting from the Rival open dataset of 19+ human preference judgments for this pair.
Pick Claude 3.7 Sonnet. In 19 blind votes, Claude 3.7 Sonnet wins 62% of the time. That's not luck.
Pick Claude 3.7 Sonnet for Web Design, Image Generation. Pick Grok Code Fast 1 for Analysis, Reasoning. Grok Code Fast 1 is 10x cheaper per token — worth considering if cost matters.
Grok Code Fast 1 uses 6.0x more emoji
Ask them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.

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50 fights queued
38+ more head-to-head results. Free. Not a trick.
Free account. No card required. By continuing, you agree to Rival's Terms and Privacy Policy