Question 1

What is the difference between Grok 3 Beta and xAI: Grok 4 Fast (free)?

Accepted Answer

Both are developed by xAI but target different use cases. Grok 3 Beta has a 131K token context window vs xAI: Grok 4 Fast (free)'s 2.0M. You can compare their actual outputs across 29 challenges on RIVAL to see how they differ in practice.

Question 2

Which is better, Grok 3 Beta or xAI: Grok 4 Fast (free)?

Accepted Answer

It depends on your use case. Grok 3 Beta and xAI: Grok 4 Fast (free) each have strengths in different areas. RIVAL lets you compare their real outputs side-by-side across 29 challenges so you can judge which fits your needs best.

Question 3

How much does Grok 3 Beta cost compared to xAI: Grok 4 Fast (free)?

Accepted Answer

Grok 3 Beta costs $2/M input tokens and xAI: Grok 4 Fast (free) costs $0/M input tokens. xAI: Grok 4 Fast (free) is $2.00/M cheaper per input. Check their side-by-side outputs on RIVAL to see if the price difference is justified by quality.

Question 4

How can I compare Grok 3 Beta and xAI: Grok 4 Fast (free) on RIVAL?

Accepted Answer

This page shows a side-by-side comparison of Grok 3 Beta and xAI: Grok 4 Fast (free) across shared challenges. You can vote on which model produced the better output, and Pro users can create custom challenges to test both models with their own prompts.

Grok 3 Beta vs xAI: Grok 4 Fast (free)

What is the difference between Grok 3 Beta and xAI: Grok 4 Fast (free)?

Which is better, Grok 3 Beta or xAI: Grok 4 Fast (free)?

How much does Grok 3 Beta cost compared to xAI: Grok 4 Fast (free)?

How can I compare Grok 3 Beta and xAI: Grok 4 Fast (free) on RIVAL?