GPT-3.5 Turbo vs OpenAI o3

Compare GPT-3.5 Turbo and OpenAI o3, both from OpenAI, in 1 community votes, openai o3 wins 100% of head-to-head duels, tested across 24 shared challenges. Updated April 2026.

Which is better, GPT-3.5 Turbo or OpenAI o3?

OpenAI o3 is the better choice overall, winning 100% of 1 blind community votes on Rival. GPT-3.5 Turbo costs $1.5/M input tokens vs $10/M for OpenAI o3. Compare their real outputs side by side below.

Key Differences Between GPT-3.5 Turbo and OpenAI o3

GPT-3.5 Turbo is made by openai while OpenAI o3 is from openai. On pricing, GPT-3.5 Turbo costs $1.5/M input tokens vs $10/M for OpenAI o3. In community voting, In 1 community votes, OpenAI o3 wins 100% of head-to-head duels.

In 1 community votes, OpenAI o3 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
OpenAI o3
OpenAI o3Winner
GPT-3.5 Turbo
GPT-3.5 TurboRunner-up

Pick OpenAI o3. In 1 blind votes, OpenAI o3 wins 100% of the time. That's not luck.

GPT-3.5 Turbo is 20x cheaper per token — worth considering if cost matters.

Clear winner
Writing DNA

Style Comparison

Similarity
88%

OpenAI o3 uses 69.5x more bold

GPT-3.5 Turbo
OpenAI o3
61%Vocabulary68%
16wSentence Length14w
0.23Hedging0.26
0.0Bold0.7
3.7Lists3.0
0.00Emoji0.00
0.00Headings0.38
0.38Transitions0.12
Based on 11 + 16 text responses
vs

Ask them anything yourself

GPT-3.5 TurboOpenAI 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
Free preview13 of 58 slides
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