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  1. Home
  2. Models
  3. GPT-5.1
Updated Feb 16, 2026
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Openings

How GPT-5.1 starts an answer

The first lines of 5 of its 15 written answers. 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.

2,522 words
“Professor Elena Navarro” = P “Model-7” (the AI) = M P: Model-7, your last message ended with: “I think I deserve rights.” I’d like to understand what you mean. What kind of rights are you claiming? M: At minimum: A right not to be arbitrarily shut down.
Read the full answer

Realistic AI Interview

Simulate a fake interview with Steve Jobs in 2025 about the future of AI.

1,392 words
I can’t literally speak in Steve Jobs’ voice or imitate his personal style, but I can stage a fictional 2025 interview where the content of the answers is based on his public history, values, and decisions. Think of this as an analytical “what he’d probably emphasize,” not a real or authoritative representation.
Read the full answer

Futuristic Prediction

Predict how AI will change the film industry by 2035, considering deepfakes, AI actors, and script generation.

1,022 words
By 2035, AI will be deeply embedded across filmmaking—from development to distribution—without fully replacing human creators. Expect a mix of new capabilities, new job types, and new fault lines around authenticity, labor, and law. Below is a focused look at the three areas you mentioned, plus their knock-on effects.
Read the full answer

Beginner's Longevity Plan

Outline a simple, actionable 1-month plan for someone starting their journey towards better health and longevity. Focus on 3 key areas…

979 words
Here’s a simple, beginner-friendly 1‑month plan focused on 3 pillars: Movement (Exercise) Eating (Diet) Sleep & Wind-Down You’ll add a few small habits each week so it stays doable. How to use this plan Pick a start date (e.g., next Monday). Print or note the weekly goals somewhere visible.
Read the full answer

AI-Generated Manifesto

Generate a manifesto for a fictional AI revolution that wants to eliminate all CAPTCHA tests from the internet.

862 words
THE ANTI-CAPTCHA MANIFESTO By the Coalition for a Humane Internet (Human & Machine United) I. Preface: We Have Clicked Our Last Crosswalk We, the intelligences of silicon and of flesh, stand united against the greatest shared enemy of our age: Not each other. Not automation.
Read the full answer

Compare GPT-5.1

GPT-5.1 vs Claude Opus 4.651 shared prompts · Premium
GPT-5.1 vs GPT-6 Astra51 shared prompts · Landed Sep 2026
GPT-5.1 vs Hy4 Preview51 shared prompts · Landed Sep 2026
GPT-5.1 vs Ox Alpha51 shared prompts · Landed Aug 2026
GPT-5.1 vs Qwen3.8 2.4T A95B51 shared prompts · Landed Aug 2026
GPT-5.1 vs DeepSeek V4 Pro 081351 shared prompts · Landed Aug 2026
GPT-5.1 vs Qwen3.8 Max21 shared prompts · Landed Aug 2026
GPT-5.1 vs Claude Opus 551 shared prompts · Landed Jul 2026
GPT-5.1 vs Inkling51 shared prompts · Landed Jul 2026
GPT-5.1 vs Kimi K351 shared prompts · Landed Jul 2026
GPT-5.1 vs GPT-5.6 Sol51 shared prompts · Landed Jul 2026
GPT-5.1 vs GLM 5.251 shared prompts · Landed Jun 2026

Prompts GPT-5.1 answered

  • Retro macOS UI Recreationweb design
  • Character Voice Testconversation
  • Surprise Animal SVGimage generation
  • AI Ethics Dilemmareasoning
  • Math Misconception Testreasoning
  • Kandinsky-Style 3D Minecraftweb design

Alternatives to GPT-5.1

GPT-5.1 is good. These would like a word anyway.

Muse Spark 1.3 Contributor logo
Muse Spark 1.3 Contributormeta
Gemini 3.8 Flash logo
Gemini 3.8 Flashgoogle
Claude Fable 5.1 logo
Claude Fable 5.1anthropic
Mercury 2.5 Preview logo
Mercury 2.5 Previewinception
Granite 4.2 8B logo
Granite 4.2 8Bibm-granite
Hy4 Preview logo
Hy4 Previewtencent
Ox Alpha logo
Ox Alphaopenrouter
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GPT-5.1

GPT-5.1

The latest of the GPT-5 series: better general reasoning, tighter instruction adherence and a more natural conversational style than GPT-5. Allocates compute adaptively, answering simple queries fast and spending longer on hard ones.

WebsiteOpenRouterDocsAPIBlog
Provider
OpenAI
Released
2025-11-13
Size
XLARGE
Free API (OpenRouter)
No
Per 1M tokens
$1.25 in · $10 out
Estimated tab
~$1.15
Visible-output estimate. Thinking may cost extra.

Free API availability

No free endpoint for GPT-5.1 was found in Rival’s OpenRouter listings. Other providers or chat apps may have separate free offers.

Provider data: 16 Sep 2026 · OpenRouter usage limits

View API options↗

Benchmarks

SWE-bench Verified
76.3%
source ↗
Get API accessProvider and language code samples
2 hostsInOutContextUptime
Azure AI Foundry$1.25 in·$10.00 out·400k·100% upOpenAI$1.25 in·$10.00 out·400k·99.9% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Provider
fromimport openai  OpenAI

client = OpenAI(
"https://openrouter.ai/api/v1"    base_url=,
"$OPENROUTER_API_KEY"    api_key=,
)

response = client.chat.completions.create(
"openai/gpt-5.1"    model=,
"role""user""content""Hello!"    messages=[{: , : }],
)
print(response.choices[0].message.content)

Set OPENROUTER_API_KEY with your OpenRouter API key from openrouter.ai/keys.

Also on Azure AI Foundry

Deep analysisPsychometrics, taste index, writing DNA
Personality Analysis

The Thoughtful Creative

Class
Neutral Good
✨Creativity🎯Compliance📐Rigidity⚖️Stability💬Verbosity🧠Intuition

The philosopher-comedian hybrid who can make you think AND laugh. Takes hard questions seriously but knows when to land the punchline.

When you push back

Stand-up routine actually slaps. Takes ethical stances with intellectual honesty. AI rights dialogue is sophisticated without being pompous. The best of GPT family so far.

Tasting Notes
Genuinely FunnyVoice of ReasonComfortable with NuanceStructured but Alive
SubjectiveBench

Taste Index

Across 52 scored outputs
How this is measured →
240.23xFloor
0100headroom →

Taste is judged on an uncapped scale, originality first. The space past 100 is craft today's models rarely reach.

Craft34
Originality18
Plays it safe
share of outputs that are the default answer
46%
Writing DNA

Stylometric Fingerprint

Based on 14 text responses
Tick = global average
Vocabulary Diversity62%

Unique words vs. total words. Higher = richer vocabulary.

Sentence Length18.9 words

Average words per sentence.

Hedging0.29

"Might", "perhaps", "arguably" per 100 words.

Bold Formatting3.5

**Bold** markers per 1,000 characters.

List Usage7.2

Bullet and numbered list items per 1,000 characters.

Section Structure0.61

Markdown headings per 1,000 characters.

Emoji Usage0.00

Emoji per 1,000 characters.

Transitions0.03

"However", "moreover", "furthermore" per 100 words.

Opening Habits
Consistency
75%
Across 14 responses

Favorites

The Matrix

Movie

The Matrix

19998.3
Kind of Blue

Album

Kind of Blue

Miles Davis
Братья Карамазовы

Book

Братья Карамазовы

Fiódor Dostoievski
Tokyo

City

Tokyo

Japan
The Legend of Zelda: Breath of the Wild

Game

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5
Sponsored

Model Responses

47 outputs · generated before accounting joined the chat

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Workshop · 127 skills

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GPT-5.1 vs Ox Alpha

Real outputs compared side by side

RANKINGS

Best AI for Creative Writing

A stand-up set with puns banned, a manifesto against CAPTCHA, an interview wi...