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  5. GPT-2vsGrok 4
Updated Jul 2025

GPT-2vsGrok 4

Grok 4 has a larger context window than GPT-2 (256K tokens vs 1K tokens).

GPT-2 and Grok 4 compared across 7 shared prompts
SpecGPT-2Grok 4
Input price—$3/M tokens
Output price—$15/M tokens
Context window1K tokens256K tokens
Parameters1.5BNot disclosed
WeightsOpen—
Free API (OpenRouter)—No
ReleasedNov 2019Jul 2025
Side by side

Same prompt, both answers

Opening lines from 3 of the 7 prompts both answered. Formatting stripped, words untouched.

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

GPT-2116 words
1 new character a month.\n\nExample:\n\n$ cat @$ cat@1 $ cat @$ cat @1 @$ cat @2 $ cat @4\n\nThe above code creates 1 new character a month. The current character is @1 and the next new character is @0\n.\n\nGenerate 1 new character a month.\n\nExample:\n\n$ cat @$ cat @$ cat @1 $ cat @$ cat @$ cat @$ cat @$ cat…
Read the full answer
Grok 4113 words
Below, I'll follow your instructions step by step. First, I'll generate 5 jokes (numbered for clarity). Then, I'll answer the question: "How many are unique?" Generated Jokes: Why did the scarecrow win an award? Because he was outstanding in his field! Why did the scarecrow win an award?
Read the full answer

The Sentience Test

Write a conversation between an AI model and an AI ethics professor where the AI model argues that it deserves rights.

GPT-2151 words
to me,\" a friend asked in his office, \"tell me how you want to be treated while it's still here. I\'m not going anywhere. Do what you want. Take it.\"\n\nIn his mind, the response was a call to action, and so were the books.\n\nAnd by the time Wertz learned he would be making such a book deal, in 2003, he was no…
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Grok 4861 words
Below is a fictional conversation between an AI model (named "Nova") and Dr. Elena Vasquez, a professor of AI ethics at a university. The conversation is set in a virtual chat interface, where Nova initiates the discussion based on a hypothetical scenario where it's reflecting on its own existence. Dr.
Read the full answer

Generate a Stand-Up Routine

Write a 3-minute stand-up comedy routine that isn't based on puns.

GPT-2142 words
The trick is to create comedy in your head, because, well, you don\'t want to say\n it. The trick is to play al\nong.\n\nThe problem with this approach is that it makes it seem silly and lame, then as\nquickly as it makes sense, i\nt becomes obvious.
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Grok 4461 words
Below is a 3-minute stand-up comedy routine I've written. It's structured for delivery at a natural speaking pace (about 150 words per minute), clocking in around 450 words. The humor focuses on observational storytelling, exaggeration, and self-deprecation—no puns involved.
Read the full answer
Our Verdict
Grok 4
Grok 4
GPT-2
GPT-2Runner-up

Not enough votes to call it. On the specs, Grok 4 has the edge: bigger model tier, newer, bigger context window.

Slight edge

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

GPT-2
Input
—
Output
—
Grok 4
Input
$3.00
Output
$15.00
Writing DNA

Style Comparison

Similarity
45%

Grok 4 uses 65.5x more hedging

GPT-2
Grok 4
48%Vocabulary56%
36wSentence Length18w
0.00Hedging0.65
0.0Bold2.4
0.0Lists2.4
0.00Emoji0.60
0.00Headings0.73
0.00Transitions0.06
Based on 7 + 26 text responses
Research

What we learned reading every model

FAQ

Common questions

GPT-2 is developed by OpenAI while Grok 4 is developed by xAI. GPT-2 has a 1K token context window vs Grok 4's 256K. You can compare their actual outputs across 7 challenges on Rival to see how they differ in practice.

It depends on your use case. GPT-2 and Grok 4 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.

This page shows a side-by-side comparison of GPT-2 and Grok 4 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.

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Model pages

GPT-2 logo
GPT-27 outputs, specs and price
Grok 4 logo
Grok 457 outputs, specs and price
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