DeepSeek R1 0528 vs OpenAI o4-mini

Compare DeepSeek R1 0528 by DeepSeek against OpenAI o4-mini by OpenAI, tested across 34 shared challenges. Updated April 2026.

Which is better, DeepSeek R1 0528 or OpenAI o4-mini?

DeepSeek R1 0528 and OpenAI o4-mini are both competitive models. DeepSeek R1 0528 costs $0/M input tokens vs $1.1/M for OpenAI o4-mini. Compare their real outputs side by side below.

Key Differences Between DeepSeek R1 0528 and OpenAI o4-mini

DeepSeek R1 0528 is made by deepseek while OpenAI o4-mini is from openai. On pricing, DeepSeek R1 0528 costs $0/M input tokens vs $1.1/M for OpenAI o4-mini.

Our Verdict
DeepSeek R1 0528
DeepSeek R1 0528
OpenAI o4-mini
OpenAI o4-miniRunner-up

No community votes yet. On paper, DeepSeek R1 0528 has the edge — bigger model tier, newer, bigger context window.

Too close to call
Writing DNA

Style Comparison

Similarity
98%

DeepSeek R1 0528 uses 683.2x more bold

DeepSeek R1 0528
OpenAI o4-mini
64%Vocabulary73%
10wSentence Length15w
0.30Hedging0.18
6.8Bold0.0
4.9Lists2.1
0.00Emoji0.00
0.40Headings0.00
0.00Transitions0.02
Based on 4 + 10 text responses
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DeepSeek R1 0528OpenAI o4-mini

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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