What is the difference between Grok 3 and xAI: Grok 4.5?

Both are developed by xAI but target different use cases. Grok 3 has a 128K token context window vs xAI: Grok 4.5's 500K. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, Grok 3 or xAI: Grok 4.5?

It depends on your use case. Grok 3 and xAI: Grok 4.5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How can I compare Grok 3 and xAI: Grok 4.5 on Rival?

This page shows a side-by-side comparison of Grok 3 and xAI: Grok 4.5 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 3 and xAI: Grok 4.5?

Both are developed by xAI but target different use cases. Grok 3 has a 128K token context window vs xAI: Grok 4.5's 500K. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, Grok 3 or xAI: Grok 4.5?

It depends on your use case. Grok 3 and xAI: Grok 4.5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How can I compare Grok 3 and xAI: Grok 4.5 on Rival?

This page shows a side-by-side comparison of Grok 3 and xAI: Grok 4.5 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.

Grok 3 vs xAI: Grok 4.5: Which Is Better?

Updated Jul 2026

Our Verdict

Grok 3

xAI: Grok 4.5

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

API pricing

Cost per 1M tokens

Grok 3

Input

—

Output

—

xAI: Grok 4.5

Input

$2.00

Output

$6.00

Writing DNA

Style Comparison

Similarity

53%

Grok 3 uses 4.2x more hedging

Grok 3

xAI: Grok 4.5

49%Vocabulary61%

18wSentence Length16w

0.94Hedging0.23

2.5Bold2.5

3.0Lists2.4

0.04Emoji0.09

0.65Headings0.48

0.08Transitions0.06

Based on 17 + 27 text responses

Research

What we learned reading every model

Grok 3 and xAI: Grok 4.5 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

Grok 3 vs MiniMax M3New provider

Grok 3 vs OpenAI o3New provider

Grok 3 vs Llama 4 MaverickNew provider

Updated Jul 2026

Our Verdict

Grok 3

xAI: Grok 4.5

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

API pricing

Cost per 1M tokens

Grok 3

Input

—

Output

—

xAI: Grok 4.5

Input

$2.00

Output

$6.00

Writing DNA

Style Comparison

Similarity

53%

Grok 3 uses 4.2x more hedging

Grok 3

xAI: Grok 4.5

49%Vocabulary61%

18wSentence Length16w

0.94Hedging0.23

2.5Bold2.5

3.0Lists2.4

0.04Emoji0.09

0.65Headings0.48

0.08Transitions0.06

Based on 17 + 27 text responses

Research

What we learned reading every model

Grok 3 and xAI: Grok 4.5 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

Grok 3 vs MiniMax M3New provider

Grok 3 vs OpenAI o3New provider

Grok 3 vs Llama 4 MaverickNew provider