What is the difference between Claude Opus 4.1 and Grok Code Fast 1?

Claude Opus 4.1 is developed by Anthropic while Grok Code Fast 1 is developed by xAI. Claude Opus 4.1 has a 200K token context window vs Grok Code Fast 1's 256K. in 75 community votes on Rival, Claude Opus 4.1 wins 85% of head-to-head matchups. These results are based on blind head-to-head voting across 53 challenges.

Which is better, Claude Opus 4.1 or Grok Code Fast 1?

Based on 75 community votes on Rival, Claude Opus 4.1 wins 85% of head-to-head matchups against Grok Code Fast 1. Claude Opus 4.1 is strongest in Web Design, Image Generation, Analysis.

How much does Claude Opus 4.1 cost compared to Grok Code Fast 1?

Claude Opus 4.1 costs $15/M input tokens and Grok Code Fast 1 costs $0.2/M input tokens. Grok Code Fast 1 is $14.80/M cheaper per input. The more expensive model wins 85% of duels, so the premium may be justified by quality.

How are Claude Opus 4.1 vs Grok Code Fast 1 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. 75 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 Claude Opus 4.1 and Grok Code Fast 1?

Claude Opus 4.1 is developed by Anthropic while Grok Code Fast 1 is developed by xAI. Claude Opus 4.1 has a 200K token context window vs Grok Code Fast 1's 256K. in 75 community votes on Rival, Claude Opus 4.1 wins 85% of head-to-head matchups. These results are based on blind head-to-head voting across 53 challenges.

Which is better, Claude Opus 4.1 or Grok Code Fast 1?

Based on 75 community votes on Rival, Claude Opus 4.1 wins 85% of head-to-head matchups against Grok Code Fast 1. Claude Opus 4.1 is strongest in Web Design, Image Generation, Analysis.

How much does Claude Opus 4.1 cost compared to Grok Code Fast 1?

Claude Opus 4.1 costs $15/M input tokens and Grok Code Fast 1 costs $0.2/M input tokens. Grok Code Fast 1 is $14.80/M cheaper per input. The more expensive model wins 85% of duels, so the premium may be justified by quality.

How are Claude Opus 4.1 vs Grok Code Fast 1 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. 75 votes have been collected for this pair across 53 challenges. All vote data is part of Rival's open dataset.

Updated Aug 2025

Claude Opus 4.1vsGrok Code Fast 1

Claude Opus 4.1 wins 85% of 75 blind community votes against Grok Code Fast 1 on Rival.

Claude Opus 4.1 and Grok Code Fast 1 compared across 53 shared prompts
Spec	Claude Opus 4.1	Grok Code Fast 1
Win rate	85%	15%
Input price	$15/M tokens	$0.2/M tokens
Output price	$75/M tokens	$1.5/M tokens
Context window	200K tokens	256K tokens
Released	Aug 2025	Aug 2025
SWE-bench Verified	74.5%	70.8%

Our Verdict

Claude Opus 4.1Winner

Grok Code Fast 1Runner-up

Pick Claude Opus 4.1. In 75 blind votes, Claude Opus 4.1 wins 85% of the time. That's not luck.

Claude Opus 4.1 wins 3 categories, Web Design by the widest margin. Grok Code Fast 1 costs 50x less per token.

Clear winner

API pricing

Cost per 1M tokens

Claude Opus 4.1

Input

$15.00

Output

$75.00

Grok Code Fast 1

Input

$0.20

75× cheaper

Output

$1.50

50× cheaper

Grok Code Fast 1 is cheaper on both — 75× input, 50× output

Writing DNA

Style Comparison

Similarity

49%

Claude Opus 4.1 uses 17.1x more emoji

Claude Opus 4.1

Grok Code Fast 1

63%Vocabulary61%

64wSentence Length18w

0.72Hedging0.82

4.5Bold2.5

5.3Lists2.3

0.81Emoji0.05

1.42Headings0.82

0.16Transitions0.09

Based on 26 + 29 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

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Updated Aug 2025

Claude Opus 4.1vsGrok Code Fast 1

Claude Opus 4.1 wins 85% of 75 blind community votes against Grok Code Fast 1 on Rival.

Claude Opus 4.1 and Grok Code Fast 1 compared across 53 shared prompts
Spec	Claude Opus 4.1	Grok Code Fast 1
Win rate	85%	15%
Input price	$15/M tokens	$0.2/M tokens
Output price	$75/M tokens	$1.5/M tokens
Context window	200K tokens	256K tokens
Released	Aug 2025	Aug 2025
SWE-bench Verified	74.5%	70.8%

Our Verdict

Claude Opus 4.1Winner

Grok Code Fast 1Runner-up

Pick Claude Opus 4.1. In 75 blind votes, Claude Opus 4.1 wins 85% of the time. That's not luck.

Claude Opus 4.1 wins 3 categories, Web Design by the widest margin. Grok Code Fast 1 costs 50x less per token.

Clear winner

API pricing

Cost per 1M tokens

Claude Opus 4.1

Input

$15.00

Output

$75.00

Grok Code Fast 1

Input

$0.20

75× cheaper

Output

$1.50

50× cheaper

Grok Code Fast 1 is cheaper on both — 75× input, 50× output

Writing DNA

Style Comparison

Similarity

49%

Claude Opus 4.1 uses 17.1x more emoji

Claude Opus 4.1

Grok Code Fast 1

63%Vocabulary61%

64wSentence Length18w

0.72Hedging0.82

4.5Bold2.5

5.3Lists2.3

0.81Emoji0.05

1.42Headings0.82

0.16Transitions0.09

Based on 26 + 29 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Grok Code Fast 1 vs GPT-5New provider

Grok Code Fast 1 vs MiniMax M3New provider

Grok Code Fast 1 vs Ox AlphaNew provider

Grok Code Fast 1 vs Gemini 2.5 Pro Preview 06-05New provider

Grok Code Fast 1 vs GLM 5New provider

Grok Code Fast 1 vs GLM 5 TurboNew provider

Grok Code Fast 1 vs GLM 5.1New provider

Grok Code Fast 1 vs GLM 5.2New provider