What is the difference between GPT-4.5 and Grok 3?

GPT-4.5 is developed by OpenAI while Grok 3 is developed by xAI. GPT-4.5 has a 128K token context window vs Grok 3's 128K. in 3 community votes on Rival, Grok 3 wins 100% of head-to-head matchups. These results are based on blind head-to-head voting across 24 challenges.

Which is better, GPT-4.5 or Grok 3?

Based on 3 community votes on Rival, Grok 3 wins 100% of head-to-head matchups against GPT-4.5.

How are GPT-4.5 vs Grok 3 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. 3 votes have been collected for this pair across 24 challenges. All vote data is part of Rival's open dataset.

What is the difference between GPT-4.5 and Grok 3?

GPT-4.5 is developed by OpenAI while Grok 3 is developed by xAI. GPT-4.5 has a 128K token context window vs Grok 3's 128K. in 3 community votes on Rival, Grok 3 wins 100% of head-to-head matchups. These results are based on blind head-to-head voting across 24 challenges.

Which is better, GPT-4.5 or Grok 3?

Based on 3 community votes on Rival, Grok 3 wins 100% of head-to-head matchups against GPT-4.5.

How are GPT-4.5 vs Grok 3 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. 3 votes have been collected for this pair across 24 challenges. All vote data is part of Rival's open dataset.

GPT-4.5 vs Grok 3: Which Is Better?

Updated Feb 2025

Our Verdict

Grok 3Winner

GPT-4.5Runner-up

Pick Grok 3. In 3 blind votes, Grok 3 wins 100% of the time. That's not luck.

Clear winner

API pricing

Cost per 1M tokens

GPT-4.5

Input

$75.00

Output

$150.00

Grok 3

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

50%

Grok 3 uses 3.9x more emoji

GPT-4.5

Grok 3

63%Vocabulary49%

16wSentence Length18w

0.57Hedging0.94

4.7Bold2.5

6.4Lists3.0

0.00Emoji0.04

1.30Headings0.65

0.54Transitions0.08

Based on 11 + 17 text responses

Research

What we learned reading every model

GPT-4.5 and Grok 3 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-4.5 vs Llama 4 MaverickNew provider

Grok 3 vs GPT-5Cross-provider

GPT-4.5 vs MiniMax M3New provider

Updated Feb 2025

Our Verdict

Grok 3Winner

GPT-4.5Runner-up

Pick Grok 3. In 3 blind votes, Grok 3 wins 100% of the time. That's not luck.

Clear winner

API pricing

Cost per 1M tokens

GPT-4.5

Input

$75.00

Output

$150.00

Grok 3

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

50%

Grok 3 uses 3.9x more emoji

GPT-4.5

Grok 3

63%Vocabulary49%

16wSentence Length18w

0.57Hedging0.94

4.7Bold2.5

6.4Lists3.0

0.00Emoji0.04

1.30Headings0.65

0.54Transitions0.08

Based on 11 + 17 text responses

Research

What we learned reading every model

GPT-4.5 and Grok 3 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-4.5 vs Llama 4 MaverickNew provider

Grok 3 vs GPT-5Cross-provider

GPT-4.5 vs MiniMax M3New provider