DeepSeek R1 vs Gemini 2.5 Pro (I/O Edition)

Compare DeepSeek R1 by DeepSeek against Gemini 2.5 Pro (I/O Edition) by Google AI, in 5 community votes, gemini 2.5 pro (i/o edition) wins 75% of head-to-head duels, tested across 34 shared challenges. Updated April 2026.

Which is better, DeepSeek R1 or Gemini 2.5 Pro (I/O Edition)?

Gemini 2.5 Pro (I/O Edition) is the better choice overall, winning 75% of 5 blind community votes on Rival. DeepSeek R1 costs $0.55/M input tokens vs $1.25/M for Gemini 2.5 Pro (I/O Edition). Compare their real outputs side by side below.

Key Differences Between DeepSeek R1 and Gemini 2.5 Pro (I/O Edition)

DeepSeek R1 is made by deepseek while Gemini 2.5 Pro (I/O Edition) is from google. On pricing, DeepSeek R1 costs $0.55/M input tokens vs $1.25/M for Gemini 2.5 Pro (I/O Edition). In community voting, In 5 community votes, Gemini 2.5 Pro (I/O Edition) wins 75% of head-to-head duels.

In 5 community votes, Gemini 2.5 Pro (I/O Edition) wins 75% of head-to-head duels. Gemini 2.5 Pro (I/O Edition) leads in Image Generation. Based on blind community voting from the Rival open dataset of 5+ human preference judgments for this pair.

Image Generation: Gemini 2.5 Pro (I/O Edition) wins 100% of votes
Our Verdict
Gemini 2.5 Pro (I/O Edition)
Gemini 2.5 Pro (I/O Edition)Winner
DeepSeek R1
DeepSeek R1Runner-up

Pick Gemini 2.5 Pro (I/O Edition). In 5 blind votes, Gemini 2.5 Pro (I/O Edition) wins 75% of the time. That's not luck.

Gemini 2.5 Pro (I/O Edition) particularly excels in Image Generation. DeepSeek R1 is 4.6x cheaper per token — worth considering if cost matters.

Clear winner
Writing DNA

Style Comparison

Similarity
96%

DeepSeek R1 uses 4.3x more emoji

DeepSeek R1
Gemini 2.5 Pro (I/O Edition)
62%Vocabulary58%
15wSentence Length16w
0.52Hedging0.38
8.0Bold5.8
5.7Lists5.0
0.04Emoji0.00
0.62Headings0.63
0.28Transitions0.01
Based on 22 + 16 text responses
vs

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DeepSeek R1Gemini 2.5 Pro (I/O Edition)

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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