What is the difference between GPT-5.1-Codex and Qwen3.5 397B A17B?

GPT-5.1-Codex is developed by OpenAI while Qwen3.5 397B A17B is developed by Qwen. GPT-5.1-Codex has a 400K token context window vs Qwen3.5 397B A17B's 262K. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.1-Codex or Qwen3.5 397B A17B?

It depends on your use case. GPT-5.1-Codex and Qwen3.5 397B A17B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How much does GPT-5.1-Codex cost compared to Qwen3.5 397B A17B?

GPT-5.1-Codex costs $1.25/M input tokens and Qwen3.5 397B A17B costs $0.6/M input tokens. Qwen3.5 397B A17B is $0.65/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-5.1-Codex and Qwen3.5 397B A17B on Rival?

This page shows a side-by-side comparison of GPT-5.1-Codex and Qwen3.5 397B A17B 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-5.1-Codex and Qwen3.5 397B A17B?

GPT-5.1-Codex is developed by OpenAI while Qwen3.5 397B A17B is developed by Qwen. GPT-5.1-Codex has a 400K token context window vs Qwen3.5 397B A17B's 262K. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.1-Codex or Qwen3.5 397B A17B?

It depends on your use case. GPT-5.1-Codex and Qwen3.5 397B A17B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How much does GPT-5.1-Codex cost compared to Qwen3.5 397B A17B?

GPT-5.1-Codex costs $1.25/M input tokens and Qwen3.5 397B A17B costs $0.6/M input tokens. Qwen3.5 397B A17B is $0.65/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-5.1-Codex and Qwen3.5 397B A17B on Rival?

This page shows a side-by-side comparison of GPT-5.1-Codex and Qwen3.5 397B A17B 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.

Updated Feb 2026

GPT-5.1-CodexvsQwen3.5 397B A17B

Qwen3.5 397B A17B is cheaper than GPT-5.1-Codex at $0.6/M vs $1.25/M input tokens.

GPT-5.1-Codex and Qwen3.5 397B A17B compared across 52 shared prompts
Spec	GPT-5.1-Codex	Qwen3.5 397B A17B
Input price	$1.25/M tokens	$0.6/M tokens
Output price	$10/M tokens	$3.6/M tokens
Context window	400K tokens	262K tokens
Released	Nov 2025	Feb 2026
SWE-bench Verified	73.7%	76.4%

Our Verdict

GPT-5.1-Codex

Qwen3.5 397B A17B

Not enough votes to call it. On the specs, nothing separates them.

Too close to call

What do GPT-5.1-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-5.1-Codex

Input

$1.25

Output

$10.00

Qwen3.5 397B A17B

Input

$0.60

2.1× cheaper

Output

$3.60

2.8× cheaper

Qwen3.5 397B A17B is cheaper on both — 2.1× input, 2.8× output

Writing DNA

Style Comparison

Similarity

43%

Qwen3.5 397B A17B uses 22.8x more emoji

GPT-5.1-Codex

Qwen3.5 397B A17B

70%Vocabulary54%

17wSentence Length14w

0.39Hedging0.39

3.4Bold6.9

3.5Lists4.2

0.00Emoji0.23

0.50Headings0.93

0.38Transitions0.17

Based on 14 + 23 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

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Updated Feb 2026

GPT-5.1-CodexvsQwen3.5 397B A17B

Qwen3.5 397B A17B is cheaper than GPT-5.1-Codex at $0.6/M vs $1.25/M input tokens.

GPT-5.1-Codex and Qwen3.5 397B A17B compared across 52 shared prompts
Spec	GPT-5.1-Codex	Qwen3.5 397B A17B
Input price	$1.25/M tokens	$0.6/M tokens
Output price	$10/M tokens	$3.6/M tokens
Context window	400K tokens	262K tokens
Released	Nov 2025	Feb 2026
SWE-bench Verified	73.7%	76.4%

Our Verdict

GPT-5.1-Codex

Qwen3.5 397B A17B

Not enough votes to call it. On the specs, nothing separates them.

Too close to call

What do GPT-5.1-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-5.1-Codex

Input

$1.25

Output

$10.00

Qwen3.5 397B A17B

Input

$0.60

2.1× cheaper

Output

$3.60

2.8× cheaper

Qwen3.5 397B A17B is cheaper on both — 2.1× input, 2.8× output

Writing DNA

Style Comparison

Similarity

43%

Qwen3.5 397B A17B uses 22.8x more emoji

GPT-5.1-Codex

Qwen3.5 397B A17B

70%Vocabulary54%

17wSentence Length14w

0.39Hedging0.39

3.4Bold6.9

3.5Lists4.2

0.00Emoji0.23

0.50Headings0.93

0.38Transitions0.17

Based on 14 + 23 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-5.1-Codex vs Ox AlphaNew provider

GPT-5.1-Codex vs MiniMax M3New provider

GPT-5.1-Codex vs Llama 4 MaverickNew provider

GPT-5.1-Codex vs Claude Opus 4New provider

GPT-5.1-Codex vs OpenRouter Fusion · Budget (Jun 2026)New provider

GPT-5.1-Codex vs OpenRouter Fusion · Quality (Jun 2026)New provider

GPT-5.1-Codex vs Gemini 1.5 ProNew provider

GPT-5.1-Codex vs Gemini 2.0 Flash ThinkingNew provider