DeepSeek R1 vs OpenAI o3

Compare DeepSeek R1 by DeepSeek against OpenAI o3 by OpenAI, tested across 53 shared challenges. Updated April 2026.

Which is better, DeepSeek R1 or OpenAI o3?

DeepSeek R1 and OpenAI o3 are both competitive models. DeepSeek R1 costs $0.55/M input tokens vs $10/M for OpenAI o3. Compare their real outputs side by side below.

Key Differences Between DeepSeek R1 and OpenAI o3

DeepSeek R1 is made by deepseek while OpenAI o3 is from openai. On pricing, DeepSeek R1 costs $0.55/M input tokens vs $10/M for OpenAI o3.

Our Verdict
OpenAI o3
OpenAI o3
DeepSeek R1
DeepSeek R1Runner-up

No community votes yet. On paper, OpenAI o3 has the edge — bigger model tier, newer.

DeepSeek R1 is 18x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
98%

DeepSeek R1 uses 4.3x more emoji

DeepSeek R1
OpenAI o3
62%Vocabulary68%
15wSentence Length14w
0.52Hedging0.26
8.0Bold0.7
5.7Lists3.0
0.04Emoji0.00
0.62Headings0.38
0.28Transitions0.12
Based on 22 + 16 text responses
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DeepSeek R1OpenAI o3

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
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FAQ

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