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Grok 4.20 Beta vs Claude Opus 4

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

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

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

Key Differences Between Grok 4.20 Beta and Claude Opus 4

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

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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