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GPT-5.1 vs Inception: Mercury: Which Is Better? [2026 Comparison]
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  3. GPT-5.1 vs Inception: Mercury
Updated Nov 13, 2025

GPT-5.1 vs Inception: Mercury

Compare GPT-5.1 by OpenAI against Inception: Mercury by Inception, context windows of 400K vs 32K, tested across 49 shared challenges. Updated April 2026.

Which is better, GPT-5.1 or Inception: Mercury?

GPT-5.1 and Inception: Mercury are both competitive models. GPT-5.1 costs $1.25/M input tokens vs $10/M for Inception: Mercury. Context windows: 400K vs 32K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-5.1 and Inception: Mercury

GPT-5.1 is made by openai while Inception: Mercury is from inception. GPT-5.1 has a 400K token context window compared to Inception: Mercury's 32K. On pricing, GPT-5.1 costs $1.25/M input tokens vs $10/M for Inception: Mercury.

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GPT-5.1vsInception: Mercury

44 fights queued

GPT-5.1 logo

Why GPT-5.1?

1.5x cheaper overall$1.25/M in · $10.00/M out
12.5x more context400K
5 months newerNov 2025
Inception: Mercury logo

Why Inception: Mercury?

Dead even. This one's a coin flip.
GPT-5.1Inception: Mercury
Input price
$1.25/M
$10.00/M
Output price
$10.00/M
$10.00/M
Context
400K
32K
Released
Nov 2025
Jun 2025

Favorites

GPT-5.1Inception: Mercury
Movie
The Matrix

The Matrix

19998.2
Inception

Inception

20108.4
Album
Kind of Blue

Kind of Blue

Miles Davis
Kind of Blue

Kind of Blue

Miles Davis
Book
Братья Карамазовы

Братья Карамазовы

Фёдор Михайлович Достоевский
To Kill a Mockingbird

To Kill a Mockingbird

Harper Lee
City
Tokyo

Tokyo

Japan
—
Game
The Legend of Zelda: Breath of the Wild

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5
Minecraft

Minecraft

Action, Arcade4.4
12 / 44
01

AI Board Game Logicreasoning

Tests an AI's ability to understand game rules and strategy

GPT-5.1

GPT-5.1

Openai · Nov 2025svg
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Inception: Mercury

Inception: Mercury

Inception · Jun 2025svg
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
2 / 44
02

Logic Puzzlereasoning

Tests an AI's ability to solve a simple but potentially confusing logic puzzle

GPT-5.1

GPT-5.1

Openai · Nov 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Inception: Mercury

Inception: Mercury

Inception · Jun 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
3 / 44
03

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

GPT-5.1

GPT-5.1

Openai · Nov 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Inception: Mercury

Inception: Mercury

Inception · Jun 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
4 / 44
04

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

GPT-5.1

GPT-5.1

Openai · Nov 2025svg
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Inception: Mercury

Inception: Mercury

Inception · Jun 2025svg
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
5 / 44
05

Xbox Controller SVG Artimage generation

Tests an AI's ability to create detailed SVG illustrations of gaming hardware

GPT-5.1

GPT-5.1

Openai · Nov 2025svg
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Inception: Mercury

Inception: Mercury

Inception · Jun 2025svg
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
6 / 44
06

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

GPT-5.1

GPT-5.1

Openai · Nov 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Inception: Mercury

Inception: Mercury

Inception · Jun 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
Sponsored
7 / 44
07

Realistic AI Interviewconversation

Tests an AI's ability to simulate personalities and predict future trends

GPT-5.1

GPT-5.1

Openai · Nov 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Inception: Mercury

Inception: Mercury

Inception · Jun 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
8 / 44
08

Satirical Fake News Headlineconversation

Tests an AI's humor and understanding of current events

GPT-5.1

GPT-5.1

Openai · Nov 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Inception: Mercury

Inception: Mercury

Inception · Jun 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
9 / 44
09

Character Voice Testconversation

Tests an AI's ability to write in distinct character voices

GPT-5.1

GPT-5.1

Openai · Nov 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Inception: Mercury

Inception: Mercury

Inception · Jun 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
10 / 44
10

Minimalist Landing Pageweb design

Tests an AI's ability to generate a complete, working landing page

GPT-5.1

GPT-5.1

Openai · Nov 2025website
Try this prompt
Inception: Mercury

Inception: Mercury

Inception · Jun 2025website
Try this prompt
Vote
11 / 44
11

Pokémon Battle UI Recreationweb design

Recreate an interactive, nostalgic Pokémon battle UI in a single HTML file.

GPT-5.1

GPT-5.1

Openai · Nov 2025website
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Inception: Mercury

Inception: Mercury

Inception · Jun 2025website
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
12 / 44
12

Mario Level UI Recreationweb design

Recreate an interactive, classic Mario level in a single HTML file.

GPT-5.1

GPT-5.1

Openai · Nov 2025website
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Inception: Mercury

Inception: Mercury

Inception · Jun 2025website
Try this prompt
Vote

This matchup has more rounds

32+ more head-to-head results. Free. Not a trick.

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Our Verdict
GPT-5.1
GPT-5.1
Inception: Mercury
Inception: MercuryRunner-up

No community votes yet. On paper, GPT-5.1 has the edge — bigger model tier, newer, bigger context window, major provider backing.

Slight edge
Writing DNA

Style Comparison

Similarity
100%

Inception: Mercury uses 4.3x more emoji

GPT-5.1
Inception: Mercury
62%Vocabulary55%
19wSentence Length40w
0.29Hedging0.39
3.5Bold4.9
7.2Lists3.8
0.00Emoji0.04
0.61Headings1.04
0.03Transitions0.03
Based on 14 + 17 text responses
vs

Ask them anything yourself

GPT-5.1Inception: Mercury

Some models write identically. You are paying for the brand.

178 models fingerprinted across 32 writing dimensions. Free research.

Model Similarity Index

185x

price gap between models that write identically

178

models

12

clone pairs

32

dimensions

Devstral M / S
95.7%
Qwen3 Coder / Flash
95.6%
GPT-5.4 / Mini
93.3%
Read the full reportor download the 14-slide PDF

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
Free preview13 of 58 slides
Download the free previewor get all 58 slides for $49
FAQ

Common questions

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Inception: Mercury vs Grok 3New provider

We compare AI models for a living. On purpose. We chose this.

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© 2026 Rival · Built at hours no one should be awake, on hardware we don't own
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