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GPT-5.1 vs Grok 4.20 Multi-Agent Beta

Compare GPT-5.1 by OpenAI against Grok 4.20 Multi-Agent Beta by xAI, context windows of 400K vs 2.0M, tested across 51 shared challenges. Updated March 2026.

Which is better, GPT-5.1 or Grok 4.20 Multi-Agent Beta?

GPT-5.1 and Grok 4.20 Multi-Agent Beta are both competitive models. GPT-5.1 costs $1.25/M input tokens vs $2/M for Grok 4.20 Multi-Agent Beta. Context windows: 400K vs 2000K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-5.1 and Grok 4.20 Multi-Agent Beta

GPT-5.1 is made by openai while Grok 4.20 Multi-Agent Beta is from xai. GPT-5.1 has a 400K token context window compared to Grok 4.20 Multi-Agent Beta's 2000K. On pricing, GPT-5.1 costs $1.25/M input tokens vs $2/M for Grok 4.20 Multi-Agent Beta.

Our Verdict
Grok 4.20 Multi-Agent Beta
Grok 4.20 Multi-Agent Beta
GPT-5.1
GPT-5.1Runner-up

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

Too close to call
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