Claude Opus 4 vs xAI: Grok 4
Compare Claude Opus 4 by Anthropic against xAI: Grok 4 by xAI, in 61 community votes, claude opus 4 wins 80% of head-to-head duels, context windows of 200K vs 256K, tested across 53 shared challenges. Updated May 2026.
Which is better, Claude Opus 4 or xAI: Grok 4?
Claude Opus 4 is the better choice overall, winning 80% of 61 blind community votes on Rival. Claude Opus 4 costs $15/M input tokens vs $3/M for xAI: Grok 4. Context windows: 200K vs 256K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4 and xAI: Grok 4
Claude Opus 4 is made by anthropic while xAI: Grok 4 is from xai. Claude Opus 4 has a 200K token context window compared to xAI: Grok 4's 256K. On pricing, Claude Opus 4 costs $15/M input tokens vs $3/M for xAI: Grok 4. In community voting, In 61 community votes, Claude Opus 4 wins 80% of head-to-head duels.
In 61 community votes, Claude Opus 4 wins 80% of head-to-head duels. Claude Opus 4 leads in Web Design, Image Generation, Reasoning. Based on blind community voting from the Rival open dataset of 61+ human preference judgments for this pair.
Per 1M tokens
xAI: Grok 4 is cheaper on both — 5.0× input, 5.0× output
Pick Claude Opus 4. In 61 blind votes, Claude Opus 4 wins 80% of the time. That's not luck.
Claude Opus 4 particularly excels in Web Design, Image Generation, Analysis. xAI: Grok 4 is 5.0x cheaper per token — worth considering if cost matters.
Style Comparison
Claude Opus 4 uses 6.2x more transitions
