ChatGPT-4o (March 2025) vs Grok 4.20 Beta
Compare ChatGPT-4o (March 2025) by OpenAI against Grok 4.20 Beta by xAI, context windows of 128K vs 2.0M, tested across 32 shared challenges. Updated April 2026.
Which is better, ChatGPT-4o (March 2025) or Grok 4.20 Beta?
ChatGPT-4o (March 2025) and Grok 4.20 Beta are both competitive models. ChatGPT-4o (March 2025) costs $5/M input tokens vs $2/M for Grok 4.20 Beta. Context windows: 128K vs 2000K tokens. Compare their real outputs side by side below.
Key Differences Between ChatGPT-4o (March 2025) and Grok 4.20 Beta
ChatGPT-4o (March 2025) is made by openai while Grok 4.20 Beta is from xai. ChatGPT-4o (March 2025) has a 128K token context window compared to Grok 4.20 Beta's 2000K. On pricing, ChatGPT-4o (March 2025) costs $5/M input tokens vs $2/M for Grok 4.20 Beta.
No community votes yet. On paper, Grok 4.20 Beta has the edge — newer, bigger context window.
Style Comparison
ChatGPT-4o (March 2025) uses 94.5x more emoji
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
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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.
