Claude Opus 4.1 vs Grok Code Fast 1
Compare Claude Opus 4.1 by Anthropic against Grok Code Fast 1 by xAI, in 75 community votes, claude opus 4.1 wins 85% of head-to-head duels, context windows of 200K vs 256K, tested across 53 shared challenges. Updated April 2026.
Which is better, Claude Opus 4.1 or Grok Code Fast 1?
Claude Opus 4.1 is the better choice overall, winning 85% of 75 blind community votes on Rival. Claude Opus 4.1 costs $15/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.
Key Differences Between Claude Opus 4.1 and Grok Code Fast 1
Claude Opus 4.1 is made by anthropic while Grok Code Fast 1 is from xai. Claude Opus 4.1 has a 200K token context window compared to Grok Code Fast 1's 256K. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $0.2/M for Grok Code Fast 1. In community voting, In 75 community votes, Claude Opus 4.1 wins 85% of head-to-head duels.
In 75 community votes, Claude Opus 4.1 wins 85% of head-to-head duels. Claude Opus 4.1 leads in Web Design, Image Generation, Analysis. Based on blind community voting from the Rival open dataset of 75+ human preference judgments for this pair.
Per 1M tokens
Grok Code Fast 1 is cheaper on both — 75× input, 50× output
Pick Claude Opus 4.1. In 75 blind votes, Claude Opus 4.1 wins 85% of the time. That's not luck.
Claude Opus 4.1 particularly excels in Web Design, Image Generation, Reasoning. Grok Code Fast 1 is 50x cheaper per token — worth considering if cost matters.
Style Comparison
Claude Opus 4.1 uses 6.4x more emoji
