ChatGPT-4o (March 2025)
Nothing here. The model returned empty. We stared at it for a while.
ChatGPT-4o (March 2025) vs DeepSeek R1
Compare ChatGPT-4o (March 2025) by OpenAI against DeepSeek R1 by DeepSeek, in 1 community votes, deepseek r1 wins 100% of head-to-head duels, context windows of 128K vs 128K, tested across 32 shared challenges. Updated April 2026.
Which is better, ChatGPT-4o (March 2025) or DeepSeek R1?
DeepSeek R1 is the better choice overall, winning 100% of 1 blind community votes on Rival. ChatGPT-4o (March 2025) costs $5/M input tokens vs $0.55/M for DeepSeek R1. Context windows: 128K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between ChatGPT-4o (March 2025) and DeepSeek R1
ChatGPT-4o (March 2025) is made by openai while DeepSeek R1 is from deepseek. ChatGPT-4o (March 2025) has a 128K token context window compared to DeepSeek R1's 128K. On pricing, ChatGPT-4o (March 2025) costs $5/M input tokens vs $0.55/M for DeepSeek R1. In community voting, In 1 community votes, DeepSeek R1 wins 100% of head-to-head duels.
In 1 community votes, DeepSeek R1 wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 1+ human preference judgments for this pair.
Our Verdict
DeepSeek R1Winner
ChatGPT-4o (March 2025)Runner-up
Pick DeepSeek R1. In 1 blind votes, DeepSeek R1 wins 100% of the time. That's not luck.
DeepSeek R1 is 6.8x cheaper per token — worth considering if cost matters.
Clear winner
Writing DNA
Style Comparison
Similarity
84%
ChatGPT-4o (March 2025) uses 21.9x more emoji
ChatGPT-4o (March 2025)
DeepSeek R1
55%Vocabulary62%
24wSentence Length15w
0.52Hedging0.52
3.3Bold8.0
6.0Lists5.7
0.94Emoji0.04
0.63Headings0.62
0.05Transitions0.28
Based on 15 + 22 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.
Free preview13 of 58 slides
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