GPT-4.5 vs Grok 3 Mini Beta
Compare GPT-4.5 by OpenAI against Grok 3 Mini Beta by xAI, context windows of 128K vs 131K, tested across 7 shared challenges. Updated April 2026.
Which is better, GPT-4.5 or Grok 3 Mini Beta?
GPT-4.5 and Grok 3 Mini Beta are both competitive models. GPT-4.5 costs $75/M input tokens vs $0.4/M for Grok 3 Mini Beta. Context windows: 128K vs 131K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-4.5 and Grok 3 Mini Beta
GPT-4.5 is made by openai while Grok 3 Mini Beta is from xai. GPT-4.5 has a 128K token context window compared to Grok 3 Mini Beta's 131K. On pricing, GPT-4.5 costs $75/M input tokens vs $0.4/M for Grok 3 Mini Beta.
Our Verdict
GPT-4.5
Grok 3 Mini Beta
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Grok 3 Mini Beta is 188x cheaper per token — worth considering if cost matters.
Too close to call
vsAsk them anything yourself
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
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