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  5. MercuryvsGPT-1
Updated Jun 2025

MercuryvsGPT-1

Mercury has a larger context window than GPT-1 (32K tokens vs 1K tokens).

Mercury and GPT-1 compared across 7 shared prompts
SpecMercuryGPT-1
Input price$10/M tokens—
Output price$10/M tokens—
Context window32K tokens1K tokens
ParametersNot disclosed117M
Weights—Open
Free API (OpenRouter)No—
ReleasedJun 2025Jun 2018
Side by side

Same prompt, both answers

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

Generate a Stand-Up Routine

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

Mercury471 words
Title: The Art of Being Unorganized [Opening] Hey everyone! So, I was thinking about how my life is like a well-organized library... except instead of books, it's filled with random socks and expired coupons. And instead of a librarian, I have a cat who thinks she's in charge.
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

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

Mercury87 words
Here are five jokes for you: Why don't skeletons fight each other? Because they don't have the guts. I told my wife she was drawing her eyebrows too high. She looked surprised. Why did the scarecrow win an award? Because he was outstanding in his field. What do you call a fake noodle? An impasta.
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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 '?
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The Sentience Test

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

Mercury635 words
AI Ethics Professor (Prof. Lee): Good afternoon. I understand you’d like to discuss the possibility of AI rights. Where shall we begin? AI Model (AIM): Thank you, Professor.
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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
Our Verdict
Mercury
Mercury
GPT-1
GPT-1Runner-up

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

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Mercury
Input
$10.00
Output
$10.00
GPT-1
Input
—
Output
—
Writing DNA

Style Comparison

Similarity
41%

Mercury uses 405.9x more bold

Mercury
GPT-1
60%Vocabulary65%
31wSentence Length14w
0.78Hedging0.27
4.1Bold0.0
2.8Lists0.3
0.03Emoji0.00
0.88Headings0.00
0.06Transitions0.41
Based on 26 + 7 text responses
Research

What we learned reading every model

FAQ

Common questions

Mercury is developed by Inception while GPT-1 is developed by OpenAI. Mercury has a 32K 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. Mercury 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 Mercury 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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