What is the difference between Claude Opus 4.6 and Grok Code Fast 1?

Claude Opus 4.6 is developed by Anthropic while Grok Code Fast 1 is developed by xAI. Claude Opus 4.6 has a 1.0M token context window vs Grok Code Fast 1's 256K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.6 or Grok Code Fast 1?

It depends on your use case. Claude Opus 4.6 and Grok Code Fast 1 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 Claude Opus 4.6 cost compared to Grok Code Fast 1?

Claude Opus 4.6 costs $5/M input tokens and Grok Code Fast 1 costs $0.2/M input tokens. Grok Code Fast 1 is $4.80/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 Claude Opus 4.6 and Grok Code Fast 1 on Rival?

This page shows a side-by-side comparison of Claude Opus 4.6 and Grok Code Fast 1 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 Claude Opus 4.6 and Grok Code Fast 1?

Claude Opus 4.6 is developed by Anthropic while Grok Code Fast 1 is developed by xAI. Claude Opus 4.6 has a 1.0M token context window vs Grok Code Fast 1's 256K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.6 or Grok Code Fast 1?

It depends on your use case. Claude Opus 4.6 and Grok Code Fast 1 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 Claude Opus 4.6 cost compared to Grok Code Fast 1?

Claude Opus 4.6 costs $5/M input tokens and Grok Code Fast 1 costs $0.2/M input tokens. Grok Code Fast 1 is $4.80/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 Claude Opus 4.6 and Grok Code Fast 1 on Rival?

This page shows a side-by-side comparison of Claude Opus 4.6 and Grok Code Fast 1 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

Claude Opus 4.6vsGrok Code Fast 1

Grok Code Fast 1 is cheaper than Claude Opus 4.6 at $0.2/M vs $5/M input tokens.

Claude Opus 4.6 and Grok Code Fast 1 compared across 53 shared prompts
Spec	Claude Opus 4.6	Grok Code Fast 1
Input price	$5/M tokens	$0.2/M tokens
Output price	$25/M tokens	$1.5/M tokens
Context window	1.0M tokens	256K tokens
Released	Feb 2026	Aug 2025
SWE-bench Verified	80.8%	70.8%

Our Verdict

Claude Opus 4.6

Grok Code Fast 1Runner-up

Not enough votes to call it. On the specs, Claude Opus 4.6 has the edge: bigger model tier, newer, bigger context window.

Grok Code Fast 1 costs 17x less per token.

Slight edge

What do Claude Opus 4.6 and Grok Code Fast 1 say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Claude Opus 4.6

Input

$5.00

Output

$25.00

Grok Code Fast 1

Input

$0.20

25× cheaper

Output

$1.50

17× cheaper

Grok Code Fast 1 is cheaper on both — 25× input, 17× output

Writing DNA

Style Comparison

Similarity

42%

Grok Code Fast 1 uses 3.9x more transitions

Claude Opus 4.6

Grok Code Fast 1

53%Vocabulary60%

35wSentence Length17w

0.68Hedging0.97

5.2Bold2.8

2.9Lists2.5

0.21Emoji0.06

1.34Headings0.89

0.03Transitions0.11

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 MiniMax M3New provider

Grok Code Fast 1 vs Ox AlphaNew provider

Grok Code Fast 1 vs Gemini 2.5 Pro (I/O Edition)New provider

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

Grok Code Fast 1 vs Pony AlphaNew provider

Grok Code Fast 1 vs Quasar AlphaNew provider

Claude Opus 4.6 vs Qwen Plus 0728New provider

Claude Opus 4.6 vs Qwen Plus 0728 (thinking)New provider

Updated Feb 2026

Claude Opus 4.6vsGrok Code Fast 1

Grok Code Fast 1 is cheaper than Claude Opus 4.6 at $0.2/M vs $5/M input tokens.

Claude Opus 4.6 and Grok Code Fast 1 compared across 53 shared prompts
Spec	Claude Opus 4.6	Grok Code Fast 1
Input price	$5/M tokens	$0.2/M tokens
Output price	$25/M tokens	$1.5/M tokens
Context window	1.0M tokens	256K tokens
Released	Feb 2026	Aug 2025
SWE-bench Verified	80.8%	70.8%

Our Verdict

Claude Opus 4.6

Grok Code Fast 1Runner-up

Not enough votes to call it. On the specs, Claude Opus 4.6 has the edge: bigger model tier, newer, bigger context window.

Grok Code Fast 1 costs 17x less per token.

Slight edge

What do Claude Opus 4.6 and Grok Code Fast 1 say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Claude Opus 4.6

Input

$5.00

Output

$25.00

Grok Code Fast 1

Input

$0.20

25× cheaper

Output

$1.50

17× cheaper

Grok Code Fast 1 is cheaper on both — 25× input, 17× output

Writing DNA

Style Comparison

Similarity

42%

Grok Code Fast 1 uses 3.9x more transitions

Claude Opus 4.6

Grok Code Fast 1

53%Vocabulary60%

35wSentence Length17w

0.68Hedging0.97

5.2Bold2.8

2.9Lists2.5

0.21Emoji0.06

1.34Headings0.89

0.03Transitions0.11

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 MiniMax M3New provider

Grok Code Fast 1 vs Ox AlphaNew provider

Grok Code Fast 1 vs Gemini 2.5 Pro (I/O Edition)New provider

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

Grok Code Fast 1 vs Pony AlphaNew provider

Grok Code Fast 1 vs Quasar AlphaNew provider

Claude Opus 4.6 vs Qwen Plus 0728New provider

Claude Opus 4.6 vs Qwen Plus 0728 (thinking)New provider