What is the difference between GPT-5 Codex and Qwen: Qwen3.5 Flash?

GPT-5 Codex is developed by OpenAI while Qwen: Qwen3.5 Flash is developed by Qwen. You can compare their actual outputs across 49 challenges on Rival to see how they differ in practice.

Which is better, GPT-5 Codex or Qwen: Qwen3.5 Flash?

It depends on your use case. GPT-5 Codex and Qwen: Qwen3.5 Flash 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-5 Codex and Qwen: Qwen3.5 Flash on Rival?

This page shows a side-by-side comparison of GPT-5 Codex and Qwen: Qwen3.5 Flash 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-5 Codex and Qwen: Qwen3.5 Flash?

GPT-5 Codex is developed by OpenAI while Qwen: Qwen3.5 Flash is developed by Qwen. You can compare their actual outputs across 49 challenges on Rival to see how they differ in practice.

Which is better, GPT-5 Codex or Qwen: Qwen3.5 Flash?

It depends on your use case. GPT-5 Codex and Qwen: Qwen3.5 Flash 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-5 Codex and Qwen: Qwen3.5 Flash on Rival?

This page shows a side-by-side comparison of GPT-5 Codex and Qwen: Qwen3.5 Flash 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-5 Codex vs Qwen: Qwen3.5 Flash: Which Is Better?

Updated Feb 2026

Our Verdict

GPT-5 Codex

Qwen: Qwen3.5 FlashRunner-up

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

Too close to call

API pricing

Cost per 1M tokens

GPT-5 Codex

Input

—

Output

—

Qwen: Qwen3.5 Flash

Input

$0.10

Output

$0.40

Writing DNA

Style Comparison

Similarity

32%

GPT-5 Codex uses 5.7x more emoji

GPT-5 Codex

Qwen: Qwen3.5 Flash

64%Vocabulary50%

17wSentence Length14w

0.38Hedging0.35

2.3Bold6.9

3.5Lists4.2

0.15Emoji0.03

0.49Headings1.00

0.05Transitions0.15

Based on 13 + 23 text responses

Research

What we learned reading every model

GPT-5 Codex and Qwen: Qwen3.5 Flash 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-5 Codex vs MiniMax M3New provider

GPT-5 Codex vs Llama 4 MaverickNew provider

GPT-5 Codex vs Claude Opus 4New provider

Updated Feb 2026

Our Verdict

GPT-5 Codex

Qwen: Qwen3.5 FlashRunner-up

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

Too close to call

API pricing

Cost per 1M tokens

GPT-5 Codex

Input

—

Output

—

Qwen: Qwen3.5 Flash

Input

$0.10

Output

$0.40

Writing DNA

Style Comparison

Similarity

32%

GPT-5 Codex uses 5.7x more emoji

GPT-5 Codex

Qwen: Qwen3.5 Flash

64%Vocabulary50%

17wSentence Length14w

0.38Hedging0.35

2.3Bold6.9

3.5Lists4.2

0.15Emoji0.03

0.49Headings1.00

0.05Transitions0.15

Based on 13 + 23 text responses

Research

What we learned reading every model

GPT-5 Codex and Qwen: Qwen3.5 Flash 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-5 Codex vs MiniMax M3New provider

GPT-5 Codex vs Llama 4 MaverickNew provider

GPT-5 Codex vs Claude Opus 4New provider