What is the difference between GPT-3.5 Turbo and GPT-5 Codex?

Both are developed by OpenAI but target different use cases. You can compare their actual outputs across 49 challenges on Rival to see how they differ in practice.

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

It depends on your use case. GPT-3.5 Turbo and GPT-5 Codex each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 49 challenges so you can judge which fits your needs best.

How can I compare GPT-3.5 Turbo and GPT-5 Codex on Rival?

This page shows a side-by-side comparison of GPT-3.5 Turbo and GPT-5 Codex across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

What is the difference between GPT-3.5 Turbo and GPT-5 Codex?

Both are developed by OpenAI but target different use cases. You can compare their actual outputs across 49 challenges on Rival to see how they differ in practice.

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

It depends on your use case. GPT-3.5 Turbo and GPT-5 Codex each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 49 challenges so you can judge which fits your needs best.

How can I compare GPT-3.5 Turbo and GPT-5 Codex on Rival?

This page shows a side-by-side comparison of GPT-3.5 Turbo and GPT-5 Codex across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

GPT-3.5 Turbo vs GPT-5 Codex: Which Is Better?

Updated Sep 2025

Our Verdict

GPT-5 Codex

GPT-3.5 TurboRunner-up

No community votes yet. On paper, GPT-5 Codex has the edge — bigger model tier, newer.

Too close to call

API pricing

Cost per 1M tokens

GPT-3.5 Turbo

Input

$1.50

Output

$2.00

GPT-5 Codex

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

67%

GPT-5 Codex uses 229.7x more bold

GPT-3.5 Turbo

GPT-5 Codex

61%Vocabulary64%

16wSentence Length17w

0.23Hedging0.38

0.0Bold2.3

3.7Lists3.5

0.00Emoji0.15

0.00Headings0.49

0.38Transitions0.05

Based on 11 + 13 text responses

Research

What we learned reading every model

GPT-3.5 Turbo and GPT-5 Codex have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

GPT-3.5 Turbo vs MiniMax M3New provider

GPT-3.5 Turbo vs Grok 3New provider

GPT-3.5 Turbo vs Llama 4 MaverickNew provider

Updated Sep 2025

Our Verdict

GPT-5 Codex

GPT-3.5 TurboRunner-up

No community votes yet. On paper, GPT-5 Codex has the edge — bigger model tier, newer.

Too close to call

API pricing

Cost per 1M tokens

GPT-3.5 Turbo

Input

$1.50

Output

$2.00

GPT-5 Codex

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

67%

GPT-5 Codex uses 229.7x more bold

GPT-3.5 Turbo

GPT-5 Codex

61%Vocabulary64%

16wSentence Length17w

0.23Hedging0.38

0.0Bold2.3

3.7Lists3.5

0.00Emoji0.15

0.00Headings0.49

0.38Transitions0.05

Based on 11 + 13 text responses

Research

What we learned reading every model

GPT-3.5 Turbo and GPT-5 Codex have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

GPT-3.5 Turbo vs MiniMax M3New provider

GPT-3.5 Turbo vs Grok 3New provider

GPT-3.5 Turbo vs Llama 4 MaverickNew provider