What is the difference between GPT-5.3-Codex and Qwen3.5 397B A17B?

GPT-5.3-Codex is developed by OpenAI while Qwen3.5 397B A17B is developed by Qwen. GPT-5.3-Codex has a 400K token context window vs Qwen3.5 397B A17B's 262K. These results are based on blind head-to-head voting across 53 challenges.

Which is better, GPT-5.3-Codex or Qwen3.5 397B A17B?

Based on 2 community votes on Rival, GPT-5.3-Codex and Qwen3.5 397B A17B are closely matched with similar win rates. The better choice depends on your specific use case. Compare their real outputs side-by-side across 53 challenges to decide.

How much does GPT-5.3-Codex cost compared to Qwen3.5 397B A17B?

GPT-5.3-Codex costs $1.75/M input tokens and Qwen3.5 397B A17B costs $0.6/M input tokens. Qwen3.5 397B A17B is $1.15/M cheaper per input. The more expensive model wins 50% of duels, so the premium may be justified by quality.

How are GPT-5.3-Codex vs Qwen3.5 397B A17B votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 2 votes have been collected for this pair across 53 challenges. All vote data is part of Rival's open dataset.

What is the difference between GPT-5.3-Codex and Qwen3.5 397B A17B?

GPT-5.3-Codex is developed by OpenAI while Qwen3.5 397B A17B is developed by Qwen. GPT-5.3-Codex has a 400K token context window vs Qwen3.5 397B A17B's 262K. These results are based on blind head-to-head voting across 53 challenges.

Which is better, GPT-5.3-Codex or Qwen3.5 397B A17B?

Based on 2 community votes on Rival, GPT-5.3-Codex and Qwen3.5 397B A17B are closely matched with similar win rates. The better choice depends on your specific use case. Compare their real outputs side-by-side across 53 challenges to decide.

How much does GPT-5.3-Codex cost compared to Qwen3.5 397B A17B?

GPT-5.3-Codex costs $1.75/M input tokens and Qwen3.5 397B A17B costs $0.6/M input tokens. Qwen3.5 397B A17B is $1.15/M cheaper per input. The more expensive model wins 50% of duels, so the premium may be justified by quality.

How are GPT-5.3-Codex vs Qwen3.5 397B A17B votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 2 votes have been collected for this pair across 53 challenges. All vote data is part of Rival's open dataset.

GPT-5.3-Codex vs Qwen3.5 397B A17B: Which Is Better?

Updated Feb 2026

Our Verdict

GPT-5.3-Codex

Qwen3.5 397B A17B

Genuinely even. Both are strong choices.

Qwen3.5 397B A17B is 3.9x cheaper per token — worth considering if cost matters.

Too close to call

What do GPT-5.3-Codex and Qwen3.5 397B A17B say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

GPT-5.3-Codex

Input

$1.75

Output

$14.00

Qwen3.5 397B A17B

Input

$0.60

2.9× cheaper

Output

$3.60

3.9× cheaper

Qwen3.5 397B A17B is cheaper on both — 2.9× input, 3.9× output

Writing DNA

Style Comparison

Similarity

47%

Qwen3.5 397B A17B uses 6.2x more transitions

GPT-5.3-Codex

Qwen3.5 397B A17B

65%Vocabulary54%

23wSentence Length14w

0.51Hedging0.39

6.5Bold6.9

6.2Lists4.2

0.16Emoji0.23

1.90Headings0.93

0.03Transitions0.17

Based on 23 + 23 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-5.3-Codex vs Ox AlphaNew provider

GPT-5.3-Codex vs MiniMax M3New provider

GPT-5.3-Codex vs Llama 4 MaverickNew provider

Updated Feb 2026

Our Verdict

GPT-5.3-Codex

Qwen3.5 397B A17B

Genuinely even. Both are strong choices.

Qwen3.5 397B A17B is 3.9x cheaper per token — worth considering if cost matters.

Too close to call

What do GPT-5.3-Codex and Qwen3.5 397B A17B say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

GPT-5.3-Codex

Input

$1.75

Output

$14.00

Qwen3.5 397B A17B

Input

$0.60

2.9× cheaper

Output

$3.60

3.9× cheaper

Qwen3.5 397B A17B is cheaper on both — 2.9× input, 3.9× output

Writing DNA

Style Comparison

Similarity

47%

Qwen3.5 397B A17B uses 6.2x more transitions

GPT-5.3-Codex

Qwen3.5 397B A17B

65%Vocabulary54%

23wSentence Length14w

0.51Hedging0.39

6.5Bold6.9

6.2Lists4.2

0.16Emoji0.23

1.90Headings0.93

0.03Transitions0.17

Based on 23 + 23 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-5.3-Codex vs Ox AlphaNew provider

GPT-5.3-Codex vs MiniMax M3New provider

GPT-5.3-Codex vs Llama 4 MaverickNew provider