What is the difference between xAI: Grok 4 and Horizon Alpha?

xAI: Grok 4 is developed by xAI while Horizon Alpha is developed by OpenRouter. xAI: Grok 4 has a 256K token context window vs Horizon Alpha's 256K. in 2 community votes on Rival, xAI: Grok 4 wins 100% of head-to-head matchups. These results are based on blind head-to-head voting across 33 challenges.

Which is better, xAI: Grok 4 or Horizon Alpha?

Based on 2 community votes on Rival, xAI: Grok 4 wins 100% of head-to-head matchups against Horizon Alpha.

How much does xAI: Grok 4 cost compared to Horizon Alpha?

xAI: Grok 4 costs $3/M input tokens and Horizon Alpha costs $0/M input tokens. Horizon Alpha is $3.00/M cheaper per input. The more expensive model wins 100% of duels, so the premium may be justified by quality.

How are xAI: Grok 4 vs Horizon Alpha 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 33 challenges. All vote data is part of Rival's open dataset.

What is the difference between xAI: Grok 4 and Horizon Alpha?

xAI: Grok 4 is developed by xAI while Horizon Alpha is developed by OpenRouter. xAI: Grok 4 has a 256K token context window vs Horizon Alpha's 256K. in 2 community votes on Rival, xAI: Grok 4 wins 100% of head-to-head matchups. These results are based on blind head-to-head voting across 33 challenges.

Which is better, xAI: Grok 4 or Horizon Alpha?

Based on 2 community votes on Rival, xAI: Grok 4 wins 100% of head-to-head matchups against Horizon Alpha.

How much does xAI: Grok 4 cost compared to Horizon Alpha?

xAI: Grok 4 costs $3/M input tokens and Horizon Alpha costs $0/M input tokens. Horizon Alpha is $3.00/M cheaper per input. The more expensive model wins 100% of duels, so the premium may be justified by quality.

How are xAI: Grok 4 vs Horizon Alpha 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 33 challenges. All vote data is part of Rival's open dataset.

xAI: Grok 4 vs Horizon Alpha: Which Is Better?

Updated Jul 2025

Our Verdict

xAI: Grok 4Winner

Horizon AlphaRunner-up

Pick xAI: Grok 4. In 2 blind votes, xAI: Grok 4 wins 100% of the time. That's not luck.

Clear winner

API pricing

Cost per 1M tokens

xAI: Grok 4

Input

$3.00

Output

$15.00

Horizon Alpha

Input

$0.000

Output

$0.000

Writing DNA

Style Comparison

Similarity

58%

xAI: Grok 4 uses 267.9x more bold

xAI: Grok 4

Horizon Alpha

53%Vocabulary65%

18wSentence Length14w

0.67Hedging0.22

2.7Bold0.0

2.7Lists3.5

0.07Emoji0.00

0.86Headings0.00

0.04Transitions0.12

Based on 21 + 14 text responses

Research

What we learned reading every model

xAI: Grok 4 and Horizon 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 vs MiniMax M3New provider

xAI: Grok 4 vs Claude Sonnet 4New provider

xAI: Grok 4 vs OpenAI o3New provider

Updated Jul 2025

Our Verdict

xAI: Grok 4Winner

Horizon AlphaRunner-up

Pick xAI: Grok 4. In 2 blind votes, xAI: Grok 4 wins 100% of the time. That's not luck.

Clear winner

API pricing

Cost per 1M tokens

xAI: Grok 4

Input

$3.00

Output

$15.00

Horizon Alpha

Input

$0.000

Output

$0.000

Writing DNA

Style Comparison

Similarity

58%

xAI: Grok 4 uses 267.9x more bold

xAI: Grok 4

Horizon Alpha

53%Vocabulary65%

18wSentence Length14w

0.67Hedging0.22

2.7Bold0.0

2.7Lists3.5

0.07Emoji0.00

0.86Headings0.00

0.04Transitions0.12

Based on 21 + 14 text responses

Research

What we learned reading every model

xAI: Grok 4 and Horizon 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 vs MiniMax M3New provider

xAI: Grok 4 vs Claude Sonnet 4New provider

xAI: Grok 4 vs OpenAI o3New provider