GPT-5.4 vs Grok 4.20 Beta
Compare GPT-5.4 by OpenAI against Grok 4.20 Beta by xAI, in 2 community votes, gpt-5.4 wins 100% of head-to-head duels, context windows of 1.1M vs 2.0M, tested across 53 shared challenges. Updated April 2026.
Which is better, GPT-5.4 or Grok 4.20 Beta?
GPT-5.4 is the better choice overall, winning 100% of 2 blind community votes on Rival. GPT-5.4 costs $2.5/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 and Grok 4.20 Beta
GPT-5.4 is made by openai while Grok 4.20 Beta is from xai. GPT-5.4 has a 1050K token context window compared to Grok 4.20 Beta's 2000K. On pricing, GPT-5.4 costs $2.5/M input tokens vs $2/M for Grok 4.20 Beta. In community voting, In 2 community votes, GPT-5.4 wins 100% of head-to-head duels.
In 2 community votes, GPT-5.4 wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 2+ human preference judgments for this pair.
Pick GPT-5.4. In 2 blind votes, GPT-5.4 wins 100% of the time. That's not luck.
Style Comparison
Grok 4.20 Beta uses 7.5x 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.
