DeepSeek R1 0528 vs GPT-5 Nano

Compare DeepSeek R1 0528 by DeepSeek against GPT-5 Nano by OpenAI, tested across 45 shared challenges. Updated April 2026.

Which is better, DeepSeek R1 0528 or GPT-5 Nano?

DeepSeek R1 0528 and GPT-5 Nano are both competitive models. Compare their real outputs side by side below.

Key Differences Between DeepSeek R1 0528 and GPT-5 Nano

DeepSeek R1 0528 is made by deepseek while GPT-5 Nano is from openai.

Our Verdict
DeepSeek R1 0528
DeepSeek R1 0528
GPT-5 Nano
GPT-5 Nano

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call
Writing DNA

Style Comparison

Similarity
76%

DeepSeek R1 0528 uses 683.2x more bold

DeepSeek R1 0528
GPT-5 Nano
64%Vocabulary59%
10wSentence Length25w
0.30Hedging0.23
6.8Bold0.0
4.9Lists4.2
0.00Emoji0.00
0.40Headings0.00
0.00Transitions0.01
Based on 4 + 14 text responses
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DeepSeek R1 0528GPT-5 Nano

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
Free preview13 of 58 slides
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