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Grok 4.20 Beta vs GPT-5

Compare Grok 4.20 Beta by xAI against GPT-5 by OpenAI, context windows of 2.0M vs 400K, tested across 46 shared challenges. Updated March 2026.

Which is better, Grok 4.20 Beta or GPT-5?

Grok 4.20 Beta and GPT-5 are both competitive models. Grok 4.20 Beta costs $2/M input tokens vs $1.25/M for GPT-5. Context windows: 2000K vs 400K tokens. Compare their real outputs side by side below.

Key Differences Between Grok 4.20 Beta and GPT-5

Grok 4.20 Beta is made by xai while GPT-5 is from openai. Grok 4.20 Beta has a 2000K token context window compared to GPT-5's 400K. On pricing, Grok 4.20 Beta costs $2/M input tokens vs $1.25/M for GPT-5.

Our Verdict
Grok 4.20 Beta
Grok 4.20 Beta
GPT-5
GPT-5Runner-up

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

Too close to call
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