GPT-5 Pro vs Grok 3 Beta
Compare GPT-5 Pro by OpenAI against Grok 3 Beta by xAI, context windows of 400K vs 131K, tested across 42 shared challenges. Updated April 2026.
Which is better, GPT-5 Pro or Grok 3 Beta?
GPT-5 Pro and Grok 3 Beta are both competitive models. GPT-5 Pro costs $15/M input tokens vs $2/M for Grok 3 Beta. Context windows: 400K vs 131K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5 Pro and Grok 3 Beta
GPT-5 Pro is made by openai while Grok 3 Beta is from xai. GPT-5 Pro has a 400K token context window compared to Grok 3 Beta's 131K. On pricing, GPT-5 Pro costs $15/M input tokens vs $2/M for Grok 3 Beta.
No community votes yet. On paper, GPT-5 Pro has the edge — newer, bigger context window.
Grok 3 Beta is 30x cheaper per token — worth considering if cost matters.
Style Comparison
Grok 3 Beta uses 309.1x more bold
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
