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GPT-4.5 vs Grok 4.20 Multi-Agent Beta

Compare GPT-4.5 by OpenAI against Grok 4.20 Multi-Agent Beta by xAI, context windows of 128K vs 2.0M, tested across 24 shared challenges. Updated March 2026.

Which is better, GPT-4.5 or Grok 4.20 Multi-Agent Beta?

GPT-4.5 and Grok 4.20 Multi-Agent Beta are both competitive models. GPT-4.5 costs $75/M input tokens vs $2/M for Grok 4.20 Multi-Agent Beta. Context windows: 128K vs 2000K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-4.5 and Grok 4.20 Multi-Agent Beta

GPT-4.5 is made by openai while Grok 4.20 Multi-Agent Beta is from xai. GPT-4.5 has a 128K token context window compared to Grok 4.20 Multi-Agent Beta's 2000K. On pricing, GPT-4.5 costs $75/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-4.5
GPT-4.5Runner-up

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

Grok 4.20 Multi-Agent Beta is 25x cheaper per token — worth considering if cost matters.

Too close to call
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