What is the difference between xAI: Grok 4.5 and GPT-1?

xAI: Grok 4.5 is developed by xAI while GPT-1 is developed by OpenAI. xAI: Grok 4.5 has a 500K token context window vs GPT-1's 1K. You can compare their actual outputs across 7 challenges on Rival to see how they differ in practice.

Which is better, xAI: Grok 4.5 or GPT-1?

It depends on your use case. xAI: Grok 4.5 and GPT-1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 7 challenges so you can judge which fits your needs best.

How can I compare xAI: Grok 4.5 and GPT-1 on Rival?

This page shows a side-by-side comparison of xAI: Grok 4.5 and GPT-1 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 xAI: Grok 4.5 and GPT-1?

xAI: Grok 4.5 is developed by xAI while GPT-1 is developed by OpenAI. xAI: Grok 4.5 has a 500K token context window vs GPT-1's 1K. You can compare their actual outputs across 7 challenges on Rival to see how they differ in practice.

Which is better, xAI: Grok 4.5 or GPT-1?

It depends on your use case. xAI: Grok 4.5 and GPT-1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 7 challenges so you can judge which fits your needs best.

How can I compare xAI: Grok 4.5 and GPT-1 on Rival?

This page shows a side-by-side comparison of xAI: Grok 4.5 and GPT-1 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.

xAI: Grok 4.5 vs GPT-1: Which Is Better?

Updated Jul 2026

Our Verdict

xAI: Grok 4.5

GPT-1Runner-up

No community votes yet. On paper, xAI: Grok 4.5 has the edge — bigger model tier, newer, bigger context window.

Slight edge

API pricing

Cost per 1M tokens

xAI: Grok 4.5

Input

$2.00

Output

$6.00

GPT-1

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

55%

xAI: Grok 4.5 uses 245.4x more bold

xAI: Grok 4.5

GPT-1

61%Vocabulary65%

16wSentence Length14w

0.23Hedging0.27

2.5Bold0.0

2.4Lists0.3

0.09Emoji0.00

0.48Headings0.00

0.06Transitions0.41

Based on 27 + 7 text responses

Research

What we learned reading every model

xAI: Grok 4.5 and GPT-1 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

GPT-1 vs MiniMax M3New provider

GPT-1 vs Claude Sonnet 4New provider

GPT-1 vs xAI: Grok 4Cross-provider

Updated Jul 2026

Our Verdict

xAI: Grok 4.5

GPT-1Runner-up

No community votes yet. On paper, xAI: Grok 4.5 has the edge — bigger model tier, newer, bigger context window.

Slight edge

API pricing

Cost per 1M tokens

xAI: Grok 4.5

Input

$2.00

Output

$6.00

GPT-1

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

55%

xAI: Grok 4.5 uses 245.4x more bold

xAI: Grok 4.5

GPT-1

61%Vocabulary65%

16wSentence Length14w

0.23Hedging0.27

2.5Bold0.0

2.4Lists0.3

0.09Emoji0.00

0.48Headings0.00

0.06Transitions0.41

Based on 27 + 7 text responses

Research

What we learned reading every model

xAI: Grok 4.5 and GPT-1 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

GPT-1 vs MiniMax M3New provider

GPT-1 vs Claude Sonnet 4New provider

GPT-1 vs xAI: Grok 4Cross-provider