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

xAI: Grok 4 is developed by xAI while Horizon Beta is developed by OpenRouter. xAI: Grok 4 has a 256K token context window vs Horizon Beta's 256K. in 10 community votes on Rival, Horizon Beta wins 88% of head-to-head matchups. These results are based on blind head-to-head voting across 40 challenges.

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

Based on 10 community votes on Rival, Horizon Beta wins 88% of head-to-head matchups against xAI: Grok 4. Horizon Beta is strongest in Web Design.

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

xAI: Grok 4 costs $3/M input tokens and Horizon Beta costs $0/M input tokens. Horizon Beta is $3.00/M cheaper per input. Horizon Beta also wins more often in community votes, making it the better value.

How are xAI: Grok 4 vs Horizon Beta 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. 10 votes have been collected for this pair across 40 challenges. All vote data is part of Rival's open dataset.

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

xAI: Grok 4 is developed by xAI while Horizon Beta is developed by OpenRouter. xAI: Grok 4 has a 256K token context window vs Horizon Beta's 256K. in 10 community votes on Rival, Horizon Beta wins 88% of head-to-head matchups. These results are based on blind head-to-head voting across 40 challenges.

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

Based on 10 community votes on Rival, Horizon Beta wins 88% of head-to-head matchups against xAI: Grok 4. Horizon Beta is strongest in Web Design.

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

xAI: Grok 4 costs $3/M input tokens and Horizon Beta costs $0/M input tokens. Horizon Beta is $3.00/M cheaper per input. Horizon Beta also wins more often in community votes, making it the better value.

How are xAI: Grok 4 vs Horizon Beta 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. 10 votes have been collected for this pair across 40 challenges. All vote data is part of Rival's open dataset.

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

Updated Aug 2025

Our Verdict

Horizon BetaWinner

xAI: Grok 4Runner-up

Pick Horizon Beta. In 10 blind votes, Horizon Beta wins 88% of the time. That's not luck.

Horizon Beta particularly excels in Web Design.

Clear winner

API pricing

Cost per 1M tokens

xAI: Grok 4

Input

$3.00

Output

$15.00

Horizon Beta

Input

$0.000

Output

$0.000

Writing DNA

Style Comparison

Similarity

69%

xAI: Grok 4 uses 267.9x more bold

xAI: Grok 4

Horizon Beta

53%Vocabulary62%

18wSentence Length15w

0.67Hedging0.24

2.7Bold0.0

2.7Lists2.2

0.07Emoji0.00

0.86Headings0.00

0.04Transitions0.18

Based on 21 + 16 text responses

Research

What we learned reading every model

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 Aug 2025

Our Verdict

Horizon BetaWinner

xAI: Grok 4Runner-up

Pick Horizon Beta. In 10 blind votes, Horizon Beta wins 88% of the time. That's not luck.

Horizon Beta particularly excels in Web Design.

Clear winner

API pricing

Cost per 1M tokens

xAI: Grok 4

Input

$3.00

Output

$15.00

Horizon Beta

Input

$0.000

Output

$0.000

Writing DNA

Style Comparison

Similarity

69%

xAI: Grok 4 uses 267.9x more bold

xAI: Grok 4

Horizon Beta

53%Vocabulary62%

18wSentence Length15w

0.67Hedging0.24

2.7Bold0.0

2.7Lists2.2

0.07Emoji0.00

0.86Headings0.00

0.04Transitions0.18

Based on 21 + 16 text responses

Research

What we learned reading every model

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