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 May 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.
Per 1M tokens
Grok 3 Mini Beta is cheaper on both — 188× input, 188× output
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.
