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Claude Opus 4.6 vs Grok 4.20 Beta

Compare Claude Opus 4.6 by Anthropic against Grok 4.20 Beta by xAI, context windows of 1.0M vs 2.0M, tested across 52 shared challenges. Updated March 2026.

Which is better, Claude Opus 4.6 or Grok 4.20 Beta?

Claude Opus 4.6 and Grok 4.20 Beta are both competitive models. Claude Opus 4.6 costs $5/M input tokens vs $2/M for Grok 4.20 Beta. Context windows: 1000K vs 2000K tokens. Compare their real outputs side by side below.

Key Differences Between Claude Opus 4.6 and Grok 4.20 Beta

Claude Opus 4.6 is made by anthropic while Grok 4.20 Beta is from xai. Claude Opus 4.6 has a 1000K token context window compared to Grok 4.20 Beta's 2000K. On pricing, Claude Opus 4.6 costs $5/M input tokens vs $2/M for Grok 4.20 Beta.

Our Verdict
Grok 4.20 Beta
Grok 4.20 Beta
Claude Opus 4.6
Claude Opus 4.6Runner-up

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

Grok 4.20 Beta is 4.2x cheaper per token — worth considering if cost matters.

Too close to call
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