What is the difference between Claude 2 and Claude Opus 4?

Both are developed by Anthropic but target different use cases. Claude 2 has a 100K token context window vs Claude Opus 4's 200K. in 2 community votes on Rival, Claude Opus 4 wins 100% of head-to-head matchups. These results are based on blind head-to-head voting across 5 challenges.

Which is better, Claude 2 or Claude Opus 4?

Based on 2 community votes on Rival, Claude Opus 4 wins 100% of head-to-head matchups against Claude 2.

How much does Claude 2 cost compared to Claude Opus 4?

Claude 2 costs $11.02/M input tokens and Claude Opus 4 costs $15/M input tokens. Claude 2 is $3.98/M cheaper per input. The more expensive model wins 100% of duels, so the premium may be justified by quality.

How are Claude 2 vs Claude Opus 4 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 5 challenges. All vote data is part of Rival's open dataset.

What is the difference between Claude 2 and Claude Opus 4?

Both are developed by Anthropic but target different use cases. Claude 2 has a 100K token context window vs Claude Opus 4's 200K. in 2 community votes on Rival, Claude Opus 4 wins 100% of head-to-head matchups. These results are based on blind head-to-head voting across 5 challenges.

Which is better, Claude 2 or Claude Opus 4?

Based on 2 community votes on Rival, Claude Opus 4 wins 100% of head-to-head matchups against Claude 2.

How much does Claude 2 cost compared to Claude Opus 4?

Claude 2 costs $11.02/M input tokens and Claude Opus 4 costs $15/M input tokens. Claude 2 is $3.98/M cheaper per input. The more expensive model wins 100% of duels, so the premium may be justified by quality.

How are Claude 2 vs Claude Opus 4 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 5 challenges. All vote data is part of Rival's open dataset.

Claude 2 vs Claude Opus 4: Which Is Better?

Updated May 2025

Our Verdict

Claude Opus 4Winner

Claude 2Runner-up

Pick Claude Opus 4. In 2 blind votes, Claude Opus 4 wins 100% of the time. That's not luck.

Clear winner

API pricing

Cost per 1M tokens

Claude 2

Input

$11.02

1.4× cheaper

Output

$32.68

2.3× cheaper

Claude Opus 4

Input

$15.00

Output

$75.00

Claude 2 is cheaper on both — 1.4× input, 2.3× output

Writing DNA

Style Comparison

Similarity

50%

Claude Opus 4 uses 52.1x more hedging

Claude 2

Claude Opus 4

65%Vocabulary64%

13wSentence Length62w

0.00Hedging0.52

0.0Bold4.4

10.2Lists9.1

0.00Emoji0.11

0.00Headings1.87

0.00Transitions0.27

Based on 2 + 16 text responses

Research

What we learned reading every model

Claude 2 and Claude Opus 4 have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

Claude 2 vs MiniMax M3New provider

Claude 2 vs GPT-5New provider

Claude 2 vs Claude Sonnet 4Version compare

Updated May 2025

Our Verdict

Claude Opus 4Winner

Claude 2Runner-up

Pick Claude Opus 4. In 2 blind votes, Claude Opus 4 wins 100% of the time. That's not luck.

Clear winner

API pricing

Cost per 1M tokens

Claude 2

Input

$11.02

1.4× cheaper

Output

$32.68

2.3× cheaper

Claude Opus 4

Input

$15.00

Output

$75.00

Claude 2 is cheaper on both — 1.4× input, 2.3× output

Writing DNA

Style Comparison

Similarity

50%

Claude Opus 4 uses 52.1x more hedging

Claude 2

Claude Opus 4

65%Vocabulary64%

13wSentence Length62w

0.00Hedging0.52

0.0Bold4.4

10.2Lists9.1

0.00Emoji0.11

0.00Headings1.87

0.00Transitions0.27

Based on 2 + 16 text responses

Research

What we learned reading every model

Claude 2 and Claude Opus 4 have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

Claude 2 vs MiniMax M3New provider

Claude 2 vs GPT-5New provider

Claude 2 vs Claude Sonnet 4Version compare