What is the difference between Claude Fable 5 and xAI: Grok 4.5?

Claude Fable 5 is developed by Anthropic while xAI: Grok 4.5 is developed by xAI. Claude Fable 5 has a 1.0M token context window vs xAI: Grok 4.5's 500K. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude Fable 5 or xAI: Grok 4.5?

It depends on your use case. Claude Fable 5 and xAI: Grok 4.5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does Claude Fable 5 cost compared to xAI: Grok 4.5?

Claude Fable 5 costs $10/M input tokens and xAI: Grok 4.5 costs $2/M input tokens. xAI: Grok 4.5 is $8.00/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 Fable 5 and xAI: Grok 4.5 on Rival?

This page shows a side-by-side comparison of Claude Fable 5 and xAI: Grok 4.5 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 Fable 5 and xAI: Grok 4.5?

Claude Fable 5 is developed by Anthropic while xAI: Grok 4.5 is developed by xAI. Claude Fable 5 has a 1.0M token context window vs xAI: Grok 4.5's 500K. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude Fable 5 or xAI: Grok 4.5?

It depends on your use case. Claude Fable 5 and xAI: Grok 4.5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does Claude Fable 5 cost compared to xAI: Grok 4.5?

Claude Fable 5 costs $10/M input tokens and xAI: Grok 4.5 costs $2/M input tokens. xAI: Grok 4.5 is $8.00/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 Fable 5 and xAI: Grok 4.5 on Rival?

This page shows a side-by-side comparison of Claude Fable 5 and xAI: Grok 4.5 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 Fable 5 vs xAI: Grok 4.5: Which Is Better?

Updated Jul 2026

Our Verdict

Claude Fable 5

xAI: Grok 4.5Runner-up

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

xAI: Grok 4.5 is 8.3x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude Fable 5

Input

$10.00

Output

$50.00

xAI: Grok 4.5

Input

$2.00

5.0× cheaper

Output

$6.00

8.3× cheaper

xAI: Grok 4.5 is cheaper on both — 5.0× input, 8.3× output

Writing DNA

Style Comparison

Similarity

60%

Claude Fable 5 uses 6.5x more emoji

Claude Fable 5

xAI: Grok 4.5

60%Vocabulary61%

22wSentence Length16w

0.49Hedging0.23

4.0Bold2.5

3.5Lists2.4

0.58Emoji0.09

1.09Headings0.48

0.05Transitions0.06

Based on 27 + 27 text responses

Research

What we learned reading every model

Claude Fable 5 and xAI: Grok 4.5 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

xAI: Grok 4.5 vs MiniMax M3New provider

xAI: Grok 4.5 vs GPT-5New provider

xAI: Grok 4.5 vs Claude Opus 4.1Cross-provider

Updated Jul 2026

Our Verdict

Claude Fable 5

xAI: Grok 4.5Runner-up

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

xAI: Grok 4.5 is 8.3x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude Fable 5

Input

$10.00

Output

$50.00

xAI: Grok 4.5

Input

$2.00

5.0× cheaper

Output

$6.00

8.3× cheaper

xAI: Grok 4.5 is cheaper on both — 5.0× input, 8.3× output

Writing DNA

Style Comparison

Similarity

60%

Claude Fable 5 uses 6.5x more emoji

Claude Fable 5

xAI: Grok 4.5

60%Vocabulary61%

22wSentence Length16w

0.49Hedging0.23

4.0Bold2.5

3.5Lists2.4

0.58Emoji0.09

1.09Headings0.48

0.05Transitions0.06

Based on 27 + 27 text responses

Research

What we learned reading every model

Claude Fable 5 and xAI: Grok 4.5 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

xAI: Grok 4.5 vs MiniMax M3New provider

xAI: Grok 4.5 vs GPT-5New provider

xAI: Grok 4.5 vs Claude Opus 4.1Cross-provider