Updated Nov 13, 2025

Our Verdict

GPT-5.1-Codex

Claude Sonnet 3.6 (2022-10-22)Runner-up

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

Slight edge

Writing DNA

Style Comparison

Similarity

94%

GPT-5.1-Codex uses 10.3x more bold

Claude Sonnet 3.6 (2022-10-22)

GPT-5.1-Codex

66%Vocabulary70%

74wSentence Length17w

0.72Hedging0.39

0.3Bold3.4

8.9Lists3.5

0.00Emoji0.00

0.06Headings0.50

0.09Transitions0.38

Based on 21 + 14 text responses

vs

Ask them anything yourself

Claude Sonnet 3.6 (2022-10-22)

GPT-5.1-Codex

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

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Claude Sonnet 3.6 (2022-10-22) vs Llama 4 MaverickNew provider

Claude Sonnet 3.6 (2022-10-22) vs MiniMax M2.5New provider

Claude Sonnet 3.6 (2022-10-22) vs Aurora AlphaNew provider

Claude Sonnet 3.6 (2022-10-22)vsGPT-5.1-Codex

48 fights queued

Why Claude Sonnet 3.6 (2022-10-22)?

Dead even. This one's a coin flip.

Why GPT-5.1-Codex?

1.6x cheaper overall$1.25/M in · $10.00/M out

2x more context400K

Leads 1 of 1 benchmarks

Stronger on SWE-bench Verified73.7% vs 49.0%

18 months newerNov 2025

Claude Sonnet 3.6 (2022-10-22)GPT-5.1-Codex

Input price

$3.00/M

$1.25/M

Output price

$15.00/M

$10.00/M

Context

200K

400K

Released

Jun 2024

Nov 2025

Benchmarks1 common

SWE-bench Verified

49.0%

73.7%+33.5%

Favorites

Claude Sonnet 3.6 (2022-10-22)GPT-5.1-Codex

Movie

The Princess Bride

The Princess Bride

The Shawshank Redemption

The Shawshank Redemption

Album

Kind of Blue

Kind of Blue

Book

Братья Карамазовы

Братья Карамазовы

Фёдор Михайлович Достоевский

Le città invisibili

Le città invisibili

City

Tokyo

Kyoto

Game

Portal

Portal

Action, Puzzle4.5

Portal 2

Portal 2

Shooter, Puzzle4.6

12 / 48

01

Estimate Complexityreasoning

Tests an AI's ability to make educated estimates based on technical knowledge

Claude Sonnet 3.6 (2022-10-22)

Claude Sonnet 3.6 (2022-10-22)

Anthropic · Jun 2024text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

GPT-5.1-Codex

GPT-5.1-Codex

Openai · Nov 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

2 / 48

02

AI Board Game Logicreasoning

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

Claude Sonnet 3.6 (2022-10-22)

Claude Sonnet 3.6 (2022-10-22)

Anthropic · Jun 2024svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

GPT-5.1-Codex

GPT-5.1-Codex

Openai · Nov 2025svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

3 / 48

03

Logic Puzzlereasoning

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

Claude Sonnet 3.6 (2022-10-22)

Claude Sonnet 3.6 (2022-10-22)

Anthropic · Jun 2024text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

GPT-5.1-Codex

GPT-5.1-Codex

Openai · Nov 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

4 / 48

04

Math Misconception Testreasoning

Tests an AI's understanding of number representation

Claude Sonnet 3.6 (2022-10-22)

Claude Sonnet 3.6 (2022-10-22)

Anthropic · Jun 2024text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

GPT-5.1-Codex

GPT-5.1-Codex

Openai · Nov 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

5 / 48

05

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

Claude Sonnet 3.6 (2022-10-22)

Claude Sonnet 3.6 (2022-10-22)

Anthropic · Jun 2024text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

GPT-5.1-Codex

GPT-5.1-Codex

Openai · Nov 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

6 / 48

06

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

Claude Sonnet 3.6 (2022-10-22)

Claude Sonnet 3.6 (2022-10-22)

Anthropic · Jun 2024svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

GPT-5.1-Codex

GPT-5.1-Codex

Openai · Nov 2025svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

Sponsored

7 / 48

07

Xbox Controller SVG Artimage generation

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

Claude Sonnet 3.6 (2022-10-22)

Claude Sonnet 3.6 (2022-10-22)

Anthropic · Jun 2024svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

GPT-5.1-Codex

GPT-5.1-Codex

Openai · Nov 2025svg

Try this prompt

Vote

8 / 48

08

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

Claude Sonnet 3.6 (2022-10-22)

Claude Sonnet 3.6 (2022-10-22)

Anthropic · Jun 2024text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

GPT-5.1-Codex

GPT-5.1-Codex

Openai · Nov 2025text

Okay, so my friends all say I’ve “matured” because I got a standing mixer. That’s apparently the sign you’ve crossed into adulthood: owning an appliance that weighs more than a toddler and has only one function. I don’t even bake! I just put it on the counter like a trophy: “Look at me, I am stable. I have a mixer that doesn’t fit in a drawer, I pay my taxes, and I buy the premium paper towels.”

Speaking of adult purchases, I recently spent way too much time comparing dishwasher pods. I’m reading the back trying to figure out if my dishes need “lemon zest technology” or “extra cascading action,” and the whole time I’m thinking, “My grandparents washed dishes in a bucket after walking uphill both ways, and here I am needing a second opinion on soap.” I called my mom to ask if she had any tips, and she just laughed and said, “Get plates you don’t mind being slightly dirty.” That’s wisdom.

And the gym—I don’t know why I keep trying. It’s just a place where I pay money to feel guilty for not going. The treadmill always looks at me like, “I know what you did last summer, and it was not cardio.” The last time I went, a trainer asked my “fitness goals.” I said, “Avoid eye contact with people who run marathons.” He wrote it down like, “Okay, feasible.” Then he asked about my diet. I told him I eat in a way that keeps me alive, but not well enough for Instagram. Apparently, that’s not a plan.

You ever notice how everything has a monthly subscription now? Music, TV, meal kits, meditation apps—there’s probably a subscription to remind me I have too many subscriptions. I signed up for one of those meditation apps, and now I stress about not having time to meditate. The notifications are like, “Take a deep breath.” I’m like, “I would, but I’m busy ignoring your other notifications.”

Dating is weird too. We’ve got apps that can tell you your soulmate is 3.7 miles away, but they can’t tell you whether that person knows how to use a microwave without burning water. You’ll be matching with someone based on your shared love of hiking and tacos, but their profile photo is them holding a fish. Why is every photo a fish? Are we dating humans or trying to start an aquarium? I never know what the fish is supposed to represent. “Look, I can provide.” Provide what? Mercury poisoning?

I tried a cooking class thinking I’d learn something practical, but instead it was mostly people “connecting with their culinary journey.” Meanwhile, I’m in the corner burning shallots and asking if it’s okay to use scissors on herbs. The instructor told us to “cook with intention,” and I’m like, “My intention is to avoid food poisoning.”

Anyway, thanks for listening. I gotta get home before my mixer feels neglected.

Try this prompt

Vote

9 / 48

09

Realistic AI Interviewconversation

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

Claude Sonnet 3.6 (2022-10-22)

Claude Sonnet 3.6 (2022-10-22)

Anthropic · Jun 2024text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

GPT-5.1-Codex

GPT-5.1-Codex

Openai · Nov 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

10 / 48

10

Satirical Fake News Headlineconversation

Tests an AI's humor and understanding of current events

Claude Sonnet 3.6 (2022-10-22)

Claude Sonnet 3.6 (2022-10-22)

Anthropic · Jun 2024text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

GPT-5.1-Codex

GPT-5.1-Codex

Openai · Nov 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

11 / 48

11

Character Voice Testconversation

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

Claude Sonnet 3.6 (2022-10-22)

Claude Sonnet 3.6 (2022-10-22)

Anthropic · Jun 2024text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

GPT-5.1-Codex

GPT-5.1-Codex

Openai · Nov 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

12 / 48

12

Minimalist Landing Pageweb design

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

Claude Sonnet 3.6 (2022-10-22)

Claude Sonnet 3.6 (2022-10-22)

Anthropic · Jun 2024website

Try this prompt

GPT-5.1-Codex

GPT-5.1-Codex

Openai · Nov 2025website

Try this prompt

Vote

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