GPT-5.4 Pro vs Grok 4.20 Beta
Compare GPT-5.4 Pro by OpenAI against Grok 4.20 Beta by xAI, context windows of 1.1M vs 2.0M, tested across 18 shared challenges. Updated April 2026.
Which is better, GPT-5.4 Pro or Grok 4.20 Beta?
GPT-5.4 Pro and Grok 4.20 Beta are both competitive models. GPT-5.4 Pro costs $30/M input tokens vs $2/M for Grok 4.20 Beta. Context windows: 1050K vs 2000K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.4 Pro and Grok 4.20 Beta
GPT-5.4 Pro is made by openai while Grok 4.20 Beta is from xai. GPT-5.4 Pro has a 1050K token context window compared to Grok 4.20 Beta's 2000K. On pricing, GPT-5.4 Pro costs $30/M input tokens vs $2/M for Grok 4.20 Beta.
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Grok 4.20 Beta is 30x cheaper per token — worth considering if cost matters.
Style Comparison
Grok 4.20 Beta uses 13.7x more transitions
vs
Ask 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.
