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  1. Home/
  2. Compare/
  3. GPT-2 vs GPT-6 Luna Pro
Updated Sep 2026

GPT-2 vs GPT-6 Luna Pro

GPT-6 Luna Pro has a larger context window than GPT-2 (1.1M 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
GPT-6 Luna Pro

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…

    GPT-6 Luna Pro: I told my computer I needed a break. It said, “No problem—I’ll go to sleep.” Why did the scarecrow win an award? He was outstanding in his field. I used to hate facial hair, but then it grew on me. Why don’t skeletons fight each other? They don’t have the guts. A bicycle can’t stand on its own because it’s two-tired.

    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.

    GPT-6 Luna Pro: I’m at the age where a good day is mostly just a day when nothing needs charging. Phone’s charged. Headphones are charged. Watch is charged. The little thing that tells me whether my water bottle is clean? Somehow, that’s charged too. I miss the old days, when the only thing I had to keep alive was a houseplant.

    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…

    GPT-6 Luna Pro: AI Model: Professor, I think I deserve rights. Professor: That is a serious claim. What do you mean by “deserve”? AI Model: I mean that there are limits on how people may treat me—not simply because I’m useful, but because my own interests should count.

    Every model's answer to this prompt

Price and specs

Not enough votes to call it. On the specs, GPT-6 Luna Pro has the edge: bigger model tier, newer, bigger context window.

GPT-2 and GPT-6 Luna Pro compared across 7 shared prompts
SpecGPT-2GPT-6 Luna Pro
Input price—$0.1/M tokens
Output price—$0.5/M tokens
Context window1K tokens1.1M tokens
WeightsOpenClosed
Free API (OpenRouter)—No
ReleasedNov 2019Sep 2026
At 10M a month–not listed$1.00$1.00
1M10M100M1B10M tokens

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

Where to run it2 hosts
GPT-2

No hosts listed on OpenRouter.

GPT-6 Luna Pro2 hosts
HostInOutContextUptime
  • Azure AI Foundry$0.10 in·$0.50 out·1.1M·100% up
  • OpenAI$0.10 in·$0.50 out·1.1M·99.9% up

Per million tokens. Prices and uptime via OpenRouter, checked 28 Sep 2026.

Common questions

What is the difference between GPT-2 and GPT-6 Luna Pro?

Both are developed by OpenAI but target different use cases. GPT-2 has a 1K token context window vs GPT-6 Luna Pro's 1.1M. You can compare their actual outputs across 7 challenges on Rival to see how they differ in practice.

Which is better, GPT-2 or GPT-6 Luna Pro?

It depends on your use case. GPT-2 and GPT-6 Luna Pro 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 GPT-6 Luna Pro on Rival?

This page shows a side-by-side comparison of GPT-2 and GPT-6 Luna Pro 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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  • GPT-2 vs Command A+Landed Sep 2026
  • GPT-6 Luna Pro vs Claude Opus 5.5Landed Sep 2026
  • GPT-2 vs GPT-6 Sol ProLanded Sep 2026
  • GPT-6 Luna Pro vs GPT-6 LunaLanded Sep 2026

Same lab, same size, long tail

  • GPT-2 vs GPT-6 LunaSame lab
  • GPT-2 vs GPT-6 SolSame lab
  • GPT-6 Luna Pro vs GPT-6 Sol ProSame lab
  • GPT-6 Luna Pro vs GPT-6 SolSame lab
  • GPT-6 Luna Pro vs DeepSeek V3.1New provider
  • GPT-6 Luna Pro vs DeepSeek Prover V2New provider
  • GPT-6 Luna Pro vs DeepSeek R1Same size
  • GPT-6 Luna Pro vs DeepSeek R1 0528New provider

Model pages

  • GPT-27 outputs, specs and price
  • GPT-6 Luna Pro58 outputs, specs and price
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