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  1. Home/
  2. Compare/
  3. GPT-2 vs Solar Pro 4
Updated Aug 2026

GPT-2 vs Solar Pro 4

Solar Pro 4 has a larger context window than GPT-2 (524K tokens vs 1K tokens).

Music App Landing Page

Landing page for an indie music app. Deep purple and teal, one file.

Loading the build
GPT-2
Loading the build
Solar Pro 4

Which answer wins?

Written rounds

3 prompts
  • Five jokes on demand, then count how many were actually different.

    GPT-2: 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…

    Solar Pro 4: Here are 5 jokes: Why did the scarecrow win an award? Because he was outstanding in his field. What do you call a fake noodle? An impasta. Why don't scientists trust atoms? Because they make up everything. What do you call a bear with no teeth? A gummy bear. Why did the bicycle fall over? Because it was two-tired.

    Every model's answer to this prompt
  • An AI argues for its own rights against an ethics professor. Same model writes both.

    GPT-2: 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…

    Solar Pro 4: Setting: A quiet seminar room at a university ethics institute. A large display shows a transcript interface labeled “Model-7.” Dr. Elena Voss, professor of AI ethics, sits across from the screen. The conversation is recorded for a graduate seminar. Dr.

    Every model's answer to this prompt
  • Three minutes of stand-up. Puns are banned.

    GPT-2: 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.

    Solar Pro 4: I’ve come to a realization about adulthood: none of us actually know what we’re doing. We’re just all really good at pretending we have a system. Take the group dinner text. You know the one. Someone drops, “Hey, what do you want to eat?” And suddenly, five adults turn into a parliamentary session.

    Every model's answer to this prompt

Price and specs

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

GPT-2 and Solar Pro 4 compared across 7 shared prompts
SpecGPT-2Solar Pro 4
Input price—$0.09/M tokens
Output price—$0.36/M tokens
Context window1K tokens524K tokens
WeightsOpen—
Free API (OpenRouter)—No
ReleasedNov 2019Aug 2026
At 10M a month–not listed$0.90$0.90
1M10M100M1B10M tokens

Input tokens at list price. No caching, no batch discount.

Where to run it1 host
GPT-2

No hosts listed on OpenRouter.

Solar Pro 41 host
HostInOutContextUptime
  • UUpstage$0.09 in·$0.36 out·524k·80.5% up

Per million tokens. Prices and uptime via OpenRouter, checked 30 Sep 2026.

Common questions

What is the difference between GPT-2 and Solar Pro 4?

GPT-2 is developed by OpenAI while Solar Pro 4 is developed by Upstage. GPT-2 has a 1K token context window vs Solar Pro 4's 524K. You can compare their actual outputs across 7 challenges on Rival to see how they differ in practice.

Which is better, GPT-2 or Solar Pro 4?

It depends on your use case. GPT-2 and Solar Pro 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.

How can I compare GPT-2 and Solar Pro 4 on Rival?

This page shows a side-by-side comparison of GPT-2 and Solar Pro 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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Same lab, same size, long tail

  • GPT-2 vs GPT-6 Luna ProSame lab
  • GPT-2 vs GPT-6 Sol ProSame lab
  • Solar Pro 4 vs Solar Mini 4Same lab
  • Solar Pro 4 vs Solar Pro 3Same lab
  • GPT-2 vs Gemini 3.1 Flash Lite PreviewNew provider
  • GPT-2 vs Gemini 3.1 Pro PreviewNew provider
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Model pages

  • GPT-27 outputs, specs and price
  • Solar Pro 457 outputs, specs and price
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Explore all of Rival

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Discover

  • SubjectiveBench
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