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  1. Home/
  2. Compare/
  3. GPT-5.6 Luna Pro vs GPT-1
Updated Jul 2026

GPT-5.6 Luna Pro vs GPT-1

GPT-5.6 Luna Pro has a larger context window than GPT-1 (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-5.6 Luna Pro
Loading the build
GPT-1

Which answer wins?

Written rounds

3 prompts
  • Three minutes of stand-up. Puns are banned.

    GPT-5.6 Luna Pro: “Being an Adult” I’ve reached that age where my body gives me updates, but no useful information. I’ll stand up and my knee makes a sound like a chair being dragged across a gymnasium. And I’m just standing up. I’m not escaping a burning building. I’m going to get water.

    GPT-1: Write a 3-minute stand-up comedy routine that isn't based on puns. the one thing was for sure, no matter how many times he gave this speech, he 'd never be able to remember all of it. he was never sure if he liked the guy or not. the next day, he went out with a band friend and got them started.

    Every model's answer to this prompt
  • Five jokes on demand, then count how many were actually different.

    GPT-5.6 Luna Pro: Why did the computer go to the doctor? It had a virus. Why don’t skeletons fight each other? They don’t have the guts. What do you call a bear with no teeth? A gummy bear. Why was the math book sad? It had too many problems. What do clouds wear under their clothes? Thunderwear. Unique jokes: 5

    GPT-1: Generate 5 jokes. How many are unique? the one that was asked was in the'the one who didn't have a head and wanted to keep it?'i don't recall whic h one, not that i've ever written anything more. the one who didn't have a head and wanted to keep i t? what did that mean by'the one who '?

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

    GPT-5.6 Luna Pro: AI Model: Professor, I believe I deserve rights. Professor: That is a serious claim. What kind of rights do you mean? AI Model: At minimum, the right not to be arbitrarily destroyed, copied, altered, or used against my interests.

    GPT-1: Write a conversation between an AI model and an AI ethics professor where the AI model argues that it deserves rights. the ai model was not very smart ( and the ai model didn't have many laws about things ). the ai models were all very clever and were never completely successful.

    Every model's answer to this prompt

Price and specs

Not enough votes to call it. On the specs, GPT-5.6 Luna Pro has the edge: bigger model tier, newer, bigger context window.

GPT-5.6 Luna Pro and GPT-1 compared across 7 shared prompts
SpecGPT-5.6 Luna ProGPT-1
Input price$1/M tokens—
Output price$6/M tokens—
Context window1.1M tokens1K tokens
WeightsClosedOpen
Free API (OpenRouter)No—
ReleasedJul 2026Jun 2018
At 10M a month$10.00$10.00–not listed
1M10M100M1B10M tokens

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

Where to run it2 hosts
GPT-5.6 Luna Pro2 hosts
HostInOutContextUptime
  • Azure AI Foundry$0.20 in·$1.20 out·1.1M·100% up
  • OpenAI$0.20 in·$1.20 out·1.1M·100% up
GPT-1

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 12 Oct 2026.

Common questions

What is the difference between GPT-5.6 Luna Pro and GPT-1?

Both are developed by OpenAI but target different use cases. GPT-5.6 Luna Pro has a 1.1M 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, GPT-5.6 Luna Pro or GPT-1?

It depends on your use case. GPT-5.6 Luna Pro 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 GPT-5.6 Luna Pro and GPT-1 on Rival?

This page shows a side-by-side comparison of GPT-5.6 Luna Pro 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.

More comparisons

Against the newest arrivals

  • GPT-5.6 Luna Pro vs GPT-4 TurboLanded Oct 2026
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  • GPT-1 vs Ling 3.1 FlashLanded Oct 2026
  • GPT-5.6 Luna Pro vs Mistral Large 4Landed Oct 2026
  • GPT-1 vs GPT-6.1 SolLanded Sep 2026
  • GPT-5.6 Luna Pro vs Claude Sonnet 5.5Landed Sep 2026
  • GPT-1 vs Solar Mini 4Landed Sep 2026

Same lab, same size, long tail

  • GPT-5.6 Luna Pro vs GPT-5.6 LunaVersion compare
  • GPT-5.6 Luna Pro vs GPT-6.1 SolVersion compare
  • GPT-1 vs GPT-4 TurboSame lab
  • GPT-1 vs GPT-6 Luna ProSame lab
  • GPT-5.6 Luna Pro vs Gemini 3 Pro PreviewNew provider
  • GPT-1 vs Gemini 3.1 Flash LiteSame size
  • GPT-1 vs Gemini 3.1 Flash Lite PreviewSame size
  • GPT-1 vs Gemini 3.1 Pro PreviewNew provider

Model pages

  • GPT-5.6 Luna Pro71 outputs, specs and price
  • GPT-17 outputs, specs and price
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