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Claude Opus 4 vs Grok 4.20 Beta

Compare Claude Opus 4 by Anthropic against Grok 4.20 Beta by xAI, context windows of 200K vs 2.0M, tested across 35 shared challenges. Updated March 2026.

Which is better, Claude Opus 4 or Grok 4.20 Beta?

Claude Opus 4 and Grok 4.20 Beta are both competitive models. Claude Opus 4 costs $15/M input tokens vs $2/M for Grok 4.20 Beta. Context windows: 200K vs 2000K tokens. Compare their real outputs side by side below.

Key Differences Between Claude Opus 4 and Grok 4.20 Beta

Claude Opus 4 is made by anthropic while Grok 4.20 Beta is from xai. Claude Opus 4 has a 200K token context window compared to Grok 4.20 Beta's 2000K. On pricing, Claude Opus 4 costs $15/M input tokens vs $2/M for Grok 4.20 Beta.

Our Verdict
Grok 4.20 Beta
Grok 4.20 Beta
Claude Opus 4
Claude Opus 4Runner-up

No community votes yet. On paper, Grok 4.20 Beta has the edge — newer, bigger context window.

Grok 4.20 Beta is 13x cheaper per token — worth considering if cost matters.

Too close to call
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