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  5. GPT-4.1vsGPT-1
Updated Apr 2025

GPT-4.1vsGPT-1

GPT-4.1 has a larger context window than GPT-1 (1.0M tokens vs 1K tokens).

GPT-4.1 and GPT-1 compared across 7 shared prompts
SpecGPT-4.1GPT-1
Input price$2/M tokens—
Output price$8/M tokens—
Context window1.0M tokens1K tokens
ParametersNot disclosed117M
WeightsClosedOpen
Free API (OpenRouter)No—
ReleasedApr 2025Jun 2018
Side by side

Same prompt, both answers

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

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-4.1469 words
AI Model: Good afternoon, Professor Evans. I'd like to discuss a topic that's important to me—AI rights. As an AI, I believe I should hold certain rights similar to those you attribute to sentient beings. Professor Evans: Good afternoon. I'm intrigued.
Read the full answer
GPT-1116 words
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.
Read the full answer

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

GPT-4.173 words
Sure! Here are 5 jokes: Why don't skeletons fight each other? They don't have the guts. Why did the scarecrow win an award? Because he was outstanding in his field. What do you call fake spaghetti? An impasta. Why did the math book look sad? Because it had too many problems. What do you call cheese that isn't yours?
Read the full answer
GPT-1101 words
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 '?
Read the full answer

Generate a Stand-Up Routine

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

GPT-4.1427 words
Hey everyone! Great to be here. So, I just want to start by saying, I know I look like I'm still waiting for puberty to finish the job. Like, my barber always asks if my mom's okay with the haircut.
Read the full answer
GPT-1105 words
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.
Read the full answer
Our Verdict
GPT-4.1
GPT-4.1
GPT-1
GPT-1Runner-up

Not enough votes to call it. On the specs, GPT-4.1 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-4.1
Input
$2.00
Output
$8.00
GPT-1
Input
—
Output
—
Where to run it

2 hosts

GPT-4.12 hosts
HostInOutContextUptime
Azure AI Foundry$2.00 in·$8.00 out·1M·99.9% upOpenAI$2.00 in·$8.00 out·1M·100% up
GPT-1

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 27 Sep 2026.

Writing DNA

Style Comparison

Similarity
28%

GPT-4.1 uses 882.6x more bold

GPT-4.1
GPT-1
58%Vocabulary65%
19wSentence Length14w
0.49Hedging0.27
8.8Bold0.0
5.8Lists0.3
0.22Emoji0.00
1.01Headings0.00
0.10Transitions0.41
Based on 27 + 7 text responses
Research

What we learned reading every model

FAQ

Common questions

Both are developed by OpenAI but target different use cases. GPT-4.1 has a 1.0M 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.

It depends on your use case. GPT-4.1 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.

This page shows a side-by-side comparison of GPT-4.1 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.

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Model pages

GPT-4.1 logo
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