GPT-4.5
Nothing here. The model returned empty. We stared at it for a while.
GPT-4.5 vs Grok 3
Compare GPT-4.5 by OpenAI against Grok 3 by xAI, in 3 community votes, grok 3 wins 100% of head-to-head duels, context windows of 128K vs 128K, tested across 24 shared challenges. Updated April 2026.
Which is better, GPT-4.5 or Grok 3?
Grok 3 is the better choice overall, winning 100% of 3 blind community votes on Rival. Context windows: 128K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-4.5 and Grok 3
GPT-4.5 is made by openai while Grok 3 is from xai. GPT-4.5 has a 128K token context window compared to Grok 3's 128K. In community voting, In 3 community votes, Grok 3 wins 100% of head-to-head duels.
In 3 community votes, Grok 3 wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 3+ human preference judgments for this pair.
Our Verdict
Grok 3Winner
GPT-4.5Runner-up
Pick Grok 3. In 3 blind votes, Grok 3 wins 100% of the time. That's not luck.
Clear winner
Writing DNA
Style Comparison
Similarity
89%
Grok 3 uses 3.9x more emoji
GPT-4.5
Grok 3
63%Vocabulary49%
16wSentence Length18w
0.57Hedging0.94
4.7Bold2.5
6.4Lists3.0
0.00Emoji0.04
1.30Headings0.65
0.54Transitions0.08
Based on 11 + 17 text responses
vsAsk them anything yourself
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
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