What is the difference between Grok 4 Fast (free) and Horizon Alpha?

Grok 4 Fast (free) is developed by xAI while Horizon Alpha is developed by OpenRouter. Grok 4 Fast (free) has a 2.0M token context window vs Horizon Alpha's 256K. You can compare their actual outputs across 34 challenges on Rival to see how they differ in practice.

Which is better, Grok 4 Fast (free) or Horizon Alpha?

It depends on your use case. Grok 4 Fast (free) and Horizon Alpha each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 34 challenges so you can judge which fits your needs best.

How much does Grok 4 Fast (free) cost compared to Horizon Alpha?

Grok 4 Fast (free) costs $0/M input tokens and Horizon Alpha costs $0/M input tokens. Horizon 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 Grok 4 Fast (free) and Horizon Alpha on Rival?

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

Grok 4 Fast (free) is developed by xAI while Horizon Alpha is developed by OpenRouter. Grok 4 Fast (free) has a 2.0M token context window vs Horizon Alpha's 256K. You can compare their actual outputs across 34 challenges on Rival to see how they differ in practice.

Which is better, Grok 4 Fast (free) or Horizon Alpha?

It depends on your use case. Grok 4 Fast (free) and Horizon Alpha each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 34 challenges so you can judge which fits your needs best.

How much does Grok 4 Fast (free) cost compared to Horizon Alpha?

Grok 4 Fast (free) costs $0/M input tokens and Horizon Alpha costs $0/M input tokens. Horizon 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 Grok 4 Fast (free) and Horizon Alpha on Rival?

This page shows a side-by-side comparison of Grok 4 Fast (free) and Horizon 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.