What is the difference between Claude 3 Opus and Claude Fable 5?

Both are developed by Anthropic but target different use cases. Claude 3 Opus has a 200K token context window vs Claude Fable 5's 1.0M. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Opus or Claude Fable 5?

It depends on your use case. Claude 3 Opus and Claude Fable 5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How much does Claude 3 Opus cost compared to Claude Fable 5?

Claude 3 Opus costs $15/M input tokens and Claude Fable 5 costs $10/M input tokens. Claude Fable 5 is $5.00/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 3 Opus and Claude Fable 5 on Rival?

This page shows a side-by-side comparison of Claude 3 Opus and Claude Fable 5 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 3 Opus and Claude Fable 5?

Both are developed by Anthropic but target different use cases. Claude 3 Opus has a 200K token context window vs Claude Fable 5's 1.0M. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Opus or Claude Fable 5?

It depends on your use case. Claude 3 Opus and Claude Fable 5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How much does Claude 3 Opus cost compared to Claude Fable 5?

Claude 3 Opus costs $15/M input tokens and Claude Fable 5 costs $10/M input tokens. Claude Fable 5 is $5.00/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 3 Opus and Claude Fable 5 on Rival?

This page shows a side-by-side comparison of Claude 3 Opus and Claude Fable 5 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.

Claude 3 Opus vs Claude Fable 5: Which Is Better?

Updated Jun 2026

Our Verdict

Claude Fable 5

Claude 3 OpusRunner-up

No community votes yet. On paper, Claude Fable 5 has the edge — newer, bigger context window.

Too close to call

What do Claude 3 Opus and Claude Fable 5 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 3 Opus

Input

$15.00

Output

$75.00

Claude Fable 5

Input

$10.00

1.5× cheaper

Output

$50.00

1.5× cheaper

Claude Fable 5 is cheaper on both — 1.5× input, 1.5× output

Writing DNA

Style Comparison

Similarity

59%

Claude Fable 5 uses 398.7x more bold

Claude 3 Opus

Claude Fable 5

54%Vocabulary60%

14wSentence Length22w

0.48Hedging0.49

0.0Bold4.0

3.0Lists3.5

0.00Emoji0.58

0.00Headings1.09

0.06Transitions0.05

Based on 3 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Claude 3 Opus vs MiniMax M3New provider

Claude 3 Opus vs GPT-5New provider

Claude 3 Opus vs Llama 4 MaverickNew provider

Updated Jun 2026

Our Verdict

Claude Fable 5

Claude 3 OpusRunner-up

No community votes yet. On paper, Claude Fable 5 has the edge — newer, bigger context window.

Too close to call

What do Claude 3 Opus and Claude Fable 5 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 3 Opus

Input

$15.00

Output

$75.00

Claude Fable 5

Input

$10.00

1.5× cheaper

Output

$50.00

1.5× cheaper

Claude Fable 5 is cheaper on both — 1.5× input, 1.5× output

Writing DNA

Style Comparison

Similarity

59%

Claude Fable 5 uses 398.7x more bold

Claude 3 Opus

Claude Fable 5

54%Vocabulary60%

14wSentence Length22w

0.48Hedging0.49

0.0Bold4.0

3.0Lists3.5

0.00Emoji0.58

0.00Headings1.09

0.06Transitions0.05

Based on 3 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Claude 3 Opus vs MiniMax M3New provider

Claude 3 Opus vs GPT-5New provider

Claude 3 Opus vs Llama 4 MaverickNew provider