What is the difference between Grok Code Fast 1 and Qwen3.5 397B A17B?

Grok Code Fast 1 is developed by xAI while Qwen3.5 397B A17B is developed by Qwen. Grok Code Fast 1 has a 256K token context window vs Qwen3.5 397B A17B's 262K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Grok Code Fast 1 or Qwen3.5 397B A17B?

It depends on your use case. Grok Code Fast 1 and Qwen3.5 397B A17B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Grok Code Fast 1 cost compared to Qwen3.5 397B A17B?

Grok Code Fast 1 costs $0.2/M input tokens and Qwen3.5 397B A17B costs $0.6/M input tokens. Grok Code Fast 1 is $0.40/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 Grok Code Fast 1 and Qwen3.5 397B A17B on Rival?

This page shows a side-by-side comparison of Grok Code Fast 1 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 Grok Code Fast 1 and Qwen3.5 397B A17B?

Grok Code Fast 1 is developed by xAI while Qwen3.5 397B A17B is developed by Qwen. Grok Code Fast 1 has a 256K token context window vs Qwen3.5 397B A17B's 262K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Grok Code Fast 1 or Qwen3.5 397B A17B?

It depends on your use case. Grok Code Fast 1 and Qwen3.5 397B A17B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Grok Code Fast 1 cost compared to Qwen3.5 397B A17B?

Grok Code Fast 1 costs $0.2/M input tokens and Qwen3.5 397B A17B costs $0.6/M input tokens. Grok Code Fast 1 is $0.40/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 Grok Code Fast 1 and Qwen3.5 397B A17B on Rival?

This page shows a side-by-side comparison of Grok Code Fast 1 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

Grok Code Fast 1vsQwen3.5 397B A17B

Grok Code Fast 1 is cheaper than Qwen3.5 397B A17B at $0.2/M vs $0.6/M input tokens.

Grok Code Fast 1 and Qwen3.5 397B A17B compared across 53 shared prompts
Spec	Grok Code Fast 1	Qwen3.5 397B A17B
Input price	$0.2/M tokens	$0.6/M tokens
Output price	$1.5/M tokens	$3.6/M tokens
Context window	256K tokens	262K tokens
Released	Aug 2025	Feb 2026
SWE-bench Verified	70.8%	76.4%

Our Verdict

Qwen3.5 397B A17B

Grok Code Fast 1Runner-up

Not enough votes to call it. On the specs, Qwen3.5 397B A17B has the edge: bigger model tier, newer.

Too close to call

What do Grok Code Fast 1 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

Grok Code Fast 1

Input

$0.20

3.0× cheaper

Output

$1.50

2.4× cheaper

Qwen3.5 397B A17B

Input

$0.60

Output

$3.60

Grok Code Fast 1 is cheaper on both — 3.0× input, 2.4× output

Writing DNA

Style Comparison

Similarity

34%

Qwen3.5 397B A17B uses 3.8x more emoji

Grok Code Fast 1

Qwen3.5 397B A17B

60%Vocabulary54%

17wSentence Length14w

0.97Hedging0.39

2.8Bold6.9

2.5Lists4.2

0.06Emoji0.23

0.89Headings0.93

0.11Transitions0.17

Based on 23 + 23 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Grok Code Fast 1 vs Ox AlphaNew provider

Grok Code Fast 1 vs MiniMax M3New provider

Grok Code Fast 1 vs GPT-5New provider

Grok Code Fast 1 vs Llama 4 MaverickNew provider

Grok Code Fast 1 vs GPT-2New provider

Grok Code Fast 1 vs GPT-3.5 TurboNew provider

Grok Code Fast 1 vs GPT-4New provider

Grok Code Fast 1 vs GPT-4.1New provider

Updated Feb 2026

Grok Code Fast 1vsQwen3.5 397B A17B

Grok Code Fast 1 is cheaper than Qwen3.5 397B A17B at $0.2/M vs $0.6/M input tokens.

Grok Code Fast 1 and Qwen3.5 397B A17B compared across 53 shared prompts
Spec	Grok Code Fast 1	Qwen3.5 397B A17B
Input price	$0.2/M tokens	$0.6/M tokens
Output price	$1.5/M tokens	$3.6/M tokens
Context window	256K tokens	262K tokens
Released	Aug 2025	Feb 2026
SWE-bench Verified	70.8%	76.4%

Our Verdict

Qwen3.5 397B A17B

Grok Code Fast 1Runner-up

Not enough votes to call it. On the specs, Qwen3.5 397B A17B has the edge: bigger model tier, newer.

Too close to call

What do Grok Code Fast 1 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

Grok Code Fast 1

Input

$0.20

3.0× cheaper

Output

$1.50

2.4× cheaper

Qwen3.5 397B A17B

Input

$0.60

Output

$3.60

Grok Code Fast 1 is cheaper on both — 3.0× input, 2.4× output

Writing DNA

Style Comparison

Similarity

34%

Qwen3.5 397B A17B uses 3.8x more emoji

Grok Code Fast 1

Qwen3.5 397B A17B

60%Vocabulary54%

17wSentence Length14w

0.97Hedging0.39

2.8Bold6.9

2.5Lists4.2

0.06Emoji0.23

0.89Headings0.93

0.11Transitions0.17

Based on 23 + 23 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Grok Code Fast 1 vs Ox AlphaNew provider

Grok Code Fast 1 vs MiniMax M3New provider

Grok Code Fast 1 vs GPT-5New provider

Grok Code Fast 1 vs Llama 4 MaverickNew provider

Grok Code Fast 1 vs GPT-2New provider

Grok Code Fast 1 vs GPT-3.5 TurboNew provider

Grok Code Fast 1 vs GPT-4New provider

Grok Code Fast 1 vs GPT-4.1New provider