Grok 3 Mini Beta vs GPT-4.5
Compare Grok 3 Mini Beta by xAI against GPT-4.5 by OpenAI, context windows of 131K vs 128K, tested across 7 shared challenges. Updated March 2026.
Which is better, Grok 3 Mini Beta or GPT-4.5?
Grok 3 Mini Beta and GPT-4.5 are both competitive models. Grok 3 Mini Beta costs $0.4/M input tokens vs $75/M for GPT-4.5. Context windows: 131K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between Grok 3 Mini Beta and GPT-4.5
Grok 3 Mini Beta is made by xai while GPT-4.5 is from openai. Grok 3 Mini Beta has a 131K token context window compared to GPT-4.5's 128K. On pricing, Grok 3 Mini Beta costs $0.4/M input tokens vs $75/M for GPT-4.5.
Our Verdict
Grok 3 Mini Beta
GPT-4.5
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
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