GPT-3.5 Turbo vs GPT-5

Compare GPT-3.5 Turbo and GPT-5, both from OpenAI, in 2 community votes, gpt-5 wins 100% of head-to-head duels, context windows of 16K vs 400K, tested across 24 shared challenges. Updated April 2026.

Which is better, GPT-3.5 Turbo or GPT-5?

GPT-5 is the better choice overall, winning 100% of 2 blind community votes on Rival. GPT-3.5 Turbo costs $1.5/M input tokens vs $1.25/M for GPT-5. Context windows: 16K vs 400K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-3.5 Turbo and GPT-5

GPT-3.5 Turbo is made by openai while GPT-5 is from openai. GPT-3.5 Turbo has a 16K token context window compared to GPT-5's 400K. On pricing, GPT-3.5 Turbo costs $1.5/M input tokens vs $1.25/M for GPT-5. In community voting, In 2 community votes, GPT-5 wins 100% of head-to-head duels.

In 2 community votes, GPT-5 wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 2+ human preference judgments for this pair.

Our Verdict
GPT-5
GPT-5Winner
GPT-3.5 Turbo
GPT-3.5 TurboRunner-up

Pick GPT-5. In 2 blind votes, GPT-5 wins 100% of the time. That's not luck.

GPT-3.5 Turbo is 5.0x cheaper per token — worth considering if cost matters.

Clear winner
Writing DNA

Style Comparison

Similarity
90%

GPT-5 uses 18.9x more bold

GPT-3.5 Turbo
GPT-5
61%Vocabulary65%
16wSentence Length13w
0.23Hedging0.20
0.0Bold0.2
3.7Lists4.6
0.00Emoji0.00
0.00Headings0.16
0.38Transitions0.03
Based on 11 + 16 text responses
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GPT-3.5 TurboGPT-5

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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