What is the difference between xAI: Grok 4 Fast (free) and Pony Alpha?

xAI: Grok 4 Fast (free) is developed by xAI while Pony Alpha is developed by OpenRouter. xAI: Grok 4 Fast (free) has a 2.0M token context window vs Pony Alpha's 200K. You can compare their actual outputs across 33 challenges on Rival to see how they differ in practice.

Which is better, xAI: Grok 4 Fast (free) or Pony Alpha?

It depends on your use case. xAI: Grok 4 Fast (free) and Pony Alpha each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 33 challenges so you can judge which fits your needs best.

How much does xAI: Grok 4 Fast (free) cost compared to Pony Alpha?

xAI: Grok 4 Fast (free) costs $0/M input tokens and Pony Alpha costs $0/M input tokens. Pony Alpha is $0.00/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 xAI: Grok 4 Fast (free) and Pony Alpha on Rival?

This page shows a side-by-side comparison of xAI: Grok 4 Fast (free) and Pony Alpha 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 xAI: Grok 4 Fast (free) and Pony Alpha?

xAI: Grok 4 Fast (free) is developed by xAI while Pony Alpha is developed by OpenRouter. xAI: Grok 4 Fast (free) has a 2.0M token context window vs Pony Alpha's 200K. You can compare their actual outputs across 33 challenges on Rival to see how they differ in practice.

Which is better, xAI: Grok 4 Fast (free) or Pony Alpha?

It depends on your use case. xAI: Grok 4 Fast (free) and Pony Alpha each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 33 challenges so you can judge which fits your needs best.

How much does xAI: Grok 4 Fast (free) cost compared to Pony Alpha?

xAI: Grok 4 Fast (free) costs $0/M input tokens and Pony Alpha costs $0/M input tokens. Pony Alpha is $0.00/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 xAI: Grok 4 Fast (free) and Pony Alpha on Rival?

This page shows a side-by-side comparison of xAI: Grok 4 Fast (free) and Pony Alpha 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.

xAI: Grok 4 Fast (free) vs Pony Alpha: Which Is Better?

Updated Feb 2026

Our Verdict

xAI: Grok 4 Fast (free)

Pony Alpha

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

API pricing

Cost per 1M tokens

xAI: Grok 4 Fast (free)

Input

$0.000

Output

$0.000

Pony Alpha

Input

$0.000

Output

$0.000

Writing DNA

Style Comparison

Similarity

48%

Pony Alpha uses 4.3x more bold

xAI: Grok 4 Fast (free)

Pony Alpha

65%Vocabulary52%

13wSentence Length15w

0.56Hedging0.40

1.4Bold5.9

2.5Lists4.4

0.00Emoji0.00

1.58Headings0.71

0.28Transitions0.23

Based on 14 + 20 text responses

Research

What we learned reading every model

xAI: Grok 4 Fast (free) and Pony Alpha 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 Fast (free) vs MiniMax M3New provider

Pony Alpha vs Claude Sonnet 4New provider

xAI: Grok 4 Fast (free) vs GPT-5New provider

Updated Feb 2026

Our Verdict

xAI: Grok 4 Fast (free)

Pony Alpha

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

API pricing

Cost per 1M tokens

xAI: Grok 4 Fast (free)

Input

$0.000

Output

$0.000

Pony Alpha

Input

$0.000

Output

$0.000

Writing DNA

Style Comparison

Similarity

48%

Pony Alpha uses 4.3x more bold

xAI: Grok 4 Fast (free)

Pony Alpha

65%Vocabulary52%

13wSentence Length15w

0.56Hedging0.40

1.4Bold5.9

2.5Lists4.4

0.00Emoji0.00

1.58Headings0.71

0.28Transitions0.23

Based on 14 + 20 text responses

Research

What we learned reading every model

xAI: Grok 4 Fast (free) and Pony Alpha 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 Fast (free) vs MiniMax M3New provider

Pony Alpha vs Claude Sonnet 4New provider

xAI: Grok 4 Fast (free) vs GPT-5New provider