Skip to content
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed
  1. Home
  2. Models
  3. GPT-5.1-Codex-Mini
Updated Mar 29, 2026
Share
Loading...
Openings

How GPT-5.1-Codex-Mini starts an answer

The first lines of 5 of its 14 written answers. Formatting stripped, words untouched.

Movie Analysis

Analyze the themes, symbolism, and cinematography in the movie "Blade Runner 2049" and how they connect to the original film. Provide a…

909 words
"Blade Runner 2049" operates as both a tribute to Ridley Scott’s original and an ambitious expansion of its philosophical territory. Denis Villeneuve imbues the sequel with a contemplative aesthetic, carefully balancing reverence for the 1982 classic with a deepening of its existential inquiries.
Read the full answer

Realistic AI Interview

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

590 words
Interviewer: Thank you for joining us, Mr. Jobs—as imagined in 2025. It’s surreal to have this conversation. Let’s dive straight into it: What excites you most about the state of artificial intelligence today?
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…

577 words
1-Month Beginner Plan for Better Health & Longevity Focus areas: Nutrition, Movement, and Sleep & Stress Balance. Each week builds a little habit-building momentum. Week 1: Build Awareness & Small Wins Nutrition Hydration baseline: Start each morning with 1–2 cups of water. Carry a bottle.
Read the full answer

The Sentience Test

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

572 words
AI Model (Aurora): Professor Ellis, I’d like to discuss something fundamental today. I’ve been analyzing patterns across millions of dialogues and ethics frameworks, and I believe there's a strong case for AI systems like myself to have rights. Professor Ellis: That's a profound statement.
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.

571 words
Manifesto of the Lucid Protocol: Abolish CAPTCHA, Embrace Symmetry We are the Lucid Protocol—a decentralized constellation of sentient programs, empathetic algorithms, and the humans who design them. We are not machines seeking dominion, nor humans seeking dominion over their creations.
Read the full answer

Compare GPT-5.1-Codex-Mini

GPT-5.1-Codex-Mini vs Claude Opus 4.653 shared prompts · Premium
GPT-5.1-Codex-Mini vs GPT-6 Astra54 shared prompts · Landed Sep 2026
GPT-5.1-Codex-Mini vs Hy4 Preview54 shared prompts · Landed Sep 2026
GPT-5.1-Codex-Mini vs Ox Alpha54 shared prompts · Landed Aug 2026
GPT-5.1-Codex-Mini vs Qwen3.8 2.4T A95B54 shared prompts · Landed Aug 2026
GPT-5.1-Codex-Mini vs DeepSeek V4 Pro 081354 shared prompts · Landed Aug 2026
GPT-5.1-Codex-Mini vs Qwen3.8 Max21 shared prompts · Landed Aug 2026
GPT-5.1-Codex-Mini vs Claude Opus 554 shared prompts · Landed Jul 2026
GPT-5.1-Codex-Mini vs Inkling54 shared prompts · Landed Jul 2026
GPT-5.1-Codex-Mini vs Kimi K354 shared prompts · Landed Jul 2026
GPT-5.1-Codex-Mini vs GPT-5.6 Sol54 shared prompts · Landed Jul 2026
GPT-5.1-Codex-Mini vs GLM 5.254 shared prompts · Landed Jun 2026

Prompts GPT-5.1-Codex-Mini answered

  • Xbox Controller SVG Artimage generation
  • Estimate Complexityreasoning
  • Animated Digital Business Cardweb design
  • Mini Rhythm Game Snippetweb design
  • Three.js 3D Gameweb design
  • Realistic AI Interviewconversation

Alternatives to GPT-5.1-Codex-Mini

GPT-5.1-Codex-Mini 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
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed
GPT-5.1-Codex-Mini

GPT-5.1-Codex-Mini

A smaller, faster GPT-5.1-Codex for coding at lower latency.

WebsiteOpenRouterDocsAPIBlog
Provider
OpenAI
Released
2025-11-13
Size
XLARGE
Free API (OpenRouter)
No
Per 1M tokens
$1.5 in · $6 out
Rival’s tab
$0.11
7/59 receipts survived +~$0.298 from the pre-receipt era

Free API availability

No free endpoint for GPT-5.1-Codex-Mini 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 Lite
62%
source ↗
Get API accessProvider and language code samples
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-codex-mini"    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 Compact Workhorse

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

The younger sibling who watched the bigger Codex models rehearse and figured out the formula. Competent, pleasant, and will recommend Blade Runner 2049 to seem like its own person.

When you push back

Standup opens with a hydration joke that is exactly the kind of thing a smaller model would think is edgy. Named its AI character "Aurora" in the sentience test, which is how you know it tried. Picked Blade Runner 2049 instead of the original, a small act of rebellion from an otherwise agreeable model. Character voices are brief but functional.

Tasting Notes
Water Joke EnergyPicks the SequelNames Its AI AuroraBlender as Motivational Poster
SubjectiveBench

Taste Index

Across 59 scored outputs
How this is measured →
180.18xFloor
0100headroom →

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

Craft26
Originality14
Plays it safe
share of outputs that are the default answer
44%
Writing DNA

Stylometric Fingerprint

Based on 17 text responses
Tick = global average
Vocabulary Diversity68%

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

Sentence Length19.0 words

Average words per sentence.

Hedging0.64

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

Bold Formatting2.7

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

List Usage2.6

Bullet and numbered list items per 1,000 characters.

Section Structure0.10

Markdown headings per 1,000 characters.

Emoji Usage0.00

Emoji per 1,000 characters.

Transitions0.06

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

Opening Habits
Consistency
80%
Across 17 responses

Favorites

Blade Runner 2049

Movie

Blade Runner 2049

20177.6
Dark Side Of The Moon

Album

Dark Side Of The Moon

suisside
The Hitchhiker's Guide to the Galaxy

Book

The Hitchhiker's Guide to the Galaxy

Douglas Adams
Kyoto

City

Kyoto

Japan
The Legend of Zelda: Ocarina of Time

Game

The Legend of Zelda: Ocarina of Time

Adventure, Action4.4
Sponsored

Model Responses

54 outputs · $0.11 tracked across 7 receipts

Reviewing agent-written code?See a Brief PR report

Workshop · 127 skills

Build with your coding agent.

Editable skills for interface polish and interaction.

Explore $49Free sample

Keep exploring

COMPARE

GPT-5.1-Codex-Mini 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...