GPT-3.5 Turbo vs GPT-4o (Omni)

Compare GPT-3.5 Turbo and GPT-4o (Omni), both from OpenAI, in 2 community votes, gpt-4o (omni) wins 100% of head-to-head duels, context windows of 16K vs 128K, tested across 23 shared challenges. Updated April 2026.

Which is better, GPT-3.5 Turbo or GPT-4o (Omni)?

GPT-4o (Omni) 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 $2.5/M for GPT-4o (Omni). Context windows: 16K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-3.5 Turbo and GPT-4o (Omni)

GPT-3.5 Turbo is made by openai while GPT-4o (Omni) is from openai. GPT-3.5 Turbo has a 16K token context window compared to GPT-4o (Omni)'s 128K. On pricing, GPT-3.5 Turbo costs $1.5/M input tokens vs $2.5/M for GPT-4o (Omni). In community voting, In 2 community votes, GPT-4o (Omni) wins 100% of head-to-head duels.

In 2 community votes, GPT-4o (Omni) 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-4o (Omni)
GPT-4o (Omni)Winner
GPT-3.5 Turbo
GPT-3.5 TurboRunner-up

Pick GPT-4o (Omni). In 2 blind votes, GPT-4o (Omni) 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
67%

GPT-4o (Omni) uses 734.5x more bold

GPT-3.5 Turbo
GPT-4o (Omni)
61%Vocabulary54%
16wSentence Length18w
0.23Hedging0.72
0.0Bold7.3
3.7Lists5.6
0.00Emoji0.03
0.00Headings1.40
0.38Transitions0.26
Based on 11 + 24 text responses
vs

Ask them anything yourself

GPT-3.5 TurboGPT-4o (Omni)

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
FAQ

Common questions