Question 1

What is the difference between xAI: Grok 4 and GPT-5?

Accepted Answer

xAI: Grok 4 is developed by xAI while GPT-5 is developed by OpenAI. xAI: Grok 4 has a 256K token context window vs GPT-5's 400K. in 13 community votes on RIVAL, GPT-5 wins 67% of head-to-head matchups. These results are based on blind head-to-head voting across 38 challenges.

Question 2

Which is better, xAI: Grok 4 or GPT-5?

Accepted Answer

Based on 13 community votes on RIVAL, GPT-5 wins 67% of head-to-head matchups against xAI: Grok 4. GPT-5 is strongest in Image Generation, Reasoning. However, xAI: Grok 4 leads in Web Design.

Question 3

How much does xAI: Grok 4 cost compared to GPT-5?

Accepted Answer

xAI: Grok 4 costs $3/M input tokens and GPT-5 costs $1.25/M input tokens. GPT-5 is $1.75/M cheaper per input. GPT-5 also wins more often in community votes, making it the better value.

Question 4

How are xAI: Grok 4 vs GPT-5 votes collected on RIVAL?

Accepted Answer

RIVAL presents both models' outputs side-by-side in blind duels — voters see the responses but don't know which model produced each one. This eliminates brand bias. 13 votes have been collected for this pair across 38 challenges. All vote data is part of RIVAL's open dataset.