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GPT-4 vs Gemini 2.5 Pro Preview 06-05

Compare GPT-4 by OpenAI against Gemini 2.5 Pro Preview 06-05 by Google AI, in 1 community votes, gemini 2.5 pro preview 06-05 wins 100% of head-to-head duels, context windows of 8K vs 1.0M, tested across 19 shared challenges. Updated April 2026.

Which is better, GPT-4 or Gemini 2.5 Pro Preview 06-05?

Gemini 2.5 Pro Preview 06-05 is the better choice overall, winning 100% of 1 blind community votes on Rival. GPT-4 costs $30/M input tokens vs $1.25/M for Gemini 2.5 Pro Preview 06-05. Context windows: 8K vs 1049K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-4 and Gemini 2.5 Pro Preview 06-05

GPT-4 is made by openai while Gemini 2.5 Pro Preview 06-05 is from google. GPT-4 has a 8K token context window compared to Gemini 2.5 Pro Preview 06-05's 1049K. On pricing, GPT-4 costs $30/M input tokens vs $1.25/M for Gemini 2.5 Pro Preview 06-05. In community voting, In 1 community votes, Gemini 2.5 Pro Preview 06-05 wins 100% of head-to-head duels.

In 1 community votes, Gemini 2.5 Pro Preview 06-05 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
Gemini 2.5 Pro Preview 06-05
Gemini 2.5 Pro Preview 06-05Winner
GPT-4
GPT-4Runner-up

Pick Gemini 2.5 Pro Preview 06-05. In 1 blind votes, Gemini 2.5 Pro Preview 06-05 wins 100% of the time. That's not luck.

Gemini 2.5 Pro Preview 06-05 is 6.0x cheaper per token — worth considering if cost matters.

Clear winner
Writing DNA

Style Comparison

Similarity
99%

Gemini 2.5 Pro Preview 06-05 uses 98.0x more headings

GPT-4
Gemini 2.5 Pro Preview 06-05
59%Vocabulary51%
18wSentence Length15w
1.10Hedging0.31
0.8Bold4.8
2.5Lists4.1
0.00Emoji0.00
0.00Headings0.98
0.45Transitions0.05
Based on 15 + 20 text responses
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GPT-4Gemini 2.5 Pro Preview 06-05

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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