What is the difference between GPT-4o (Omni) and Qwen3.5 9B?

GPT-4o (Omni) is developed by OpenAI while Qwen3.5 9B is developed by Qwen. GPT-4o (Omni) has a 128K token context window vs Qwen3.5 9B's 262K. You can compare their actual outputs across 51 challenges on Rival to see how they differ in practice.

Which is better, GPT-4o (Omni) or Qwen3.5 9B?

It depends on your use case. GPT-4o (Omni) and Qwen3.5 9B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 51 challenges so you can judge which fits your needs best.

How much does GPT-4o (Omni) cost compared to Qwen3.5 9B?

GPT-4o (Omni) costs $2.5/M input tokens and Qwen3.5 9B costs $0.1/M input tokens. Qwen3.5 9B is $2.40/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare GPT-4o (Omni) and Qwen3.5 9B on Rival?

This page shows a side-by-side comparison of GPT-4o (Omni) and Qwen3.5 9B 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-4o (Omni) and Qwen3.5 9B?

GPT-4o (Omni) is developed by OpenAI while Qwen3.5 9B is developed by Qwen. GPT-4o (Omni) has a 128K token context window vs Qwen3.5 9B's 262K. You can compare their actual outputs across 51 challenges on Rival to see how they differ in practice.

Which is better, GPT-4o (Omni) or Qwen3.5 9B?

It depends on your use case. GPT-4o (Omni) and Qwen3.5 9B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 51 challenges so you can judge which fits your needs best.

How much does GPT-4o (Omni) cost compared to Qwen3.5 9B?

GPT-4o (Omni) costs $2.5/M input tokens and Qwen3.5 9B costs $0.1/M input tokens. Qwen3.5 9B is $2.40/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare GPT-4o (Omni) and Qwen3.5 9B on Rival?

This page shows a side-by-side comparison of GPT-4o (Omni) and Qwen3.5 9B 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-4o (Omni) vs Qwen3.5 9B: Which Is Better?

Updated Mar 2026

Our Verdict

GPT-4o (Omni)

Qwen3.5 9B

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Qwen3.5 9B is 67x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

GPT-4o (Omni)

Input

$2.50

Output

$10.00

Qwen3.5 9B

Input

$0.10

25× cheaper

Output

$0.15

67× cheaper

Qwen3.5 9B is cheaper on both — 25× input, 67× output

Writing DNA

Style Comparison

Similarity

69%

GPT-4o (Omni) uses 2.5x more emoji

GPT-4o (Omni)

Qwen3.5 9B

54%Vocabulary47%

18wSentence Length15w

0.72Hedging0.41

7.3Bold6.9

5.6Lists4.8

0.03Emoji0.00

1.40Headings0.91

0.26Transitions0.12

Based on 24 + 21 text responses

Research

What we learned reading every model

GPT-4o (Omni) and Qwen3.5 9B 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

Qwen3.5 9B vs Llama 4 MaverickNew provider

Qwen3.5 9B vs GPT-5Cross-provider

GPT-4o (Omni) vs MiniMax M3New provider

Updated Mar 2026

Our Verdict

GPT-4o (Omni)

Qwen3.5 9B

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Qwen3.5 9B is 67x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

GPT-4o (Omni)

Input

$2.50

Output

$10.00

Qwen3.5 9B

Input

$0.10

25× cheaper

Output

$0.15

67× cheaper

Qwen3.5 9B is cheaper on both — 25× input, 67× output

Writing DNA

Style Comparison

Similarity

69%

GPT-4o (Omni) uses 2.5x more emoji

GPT-4o (Omni)

Qwen3.5 9B

54%Vocabulary47%

18wSentence Length15w

0.72Hedging0.41

7.3Bold6.9

5.6Lists4.8

0.03Emoji0.00

1.40Headings0.91

0.26Transitions0.12

Based on 24 + 21 text responses

Research

What we learned reading every model

GPT-4o (Omni) and Qwen3.5 9B 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

Qwen3.5 9B vs Llama 4 MaverickNew provider

Qwen3.5 9B vs GPT-5Cross-provider

GPT-4o (Omni) vs MiniMax M3New provider