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  1. Home
  2. Models
  3. o3 Mini
Updated Mar 29, 2026
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Openings

How o3 Mini starts an answer

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

Advanced Investment Memo (IC Memo)

You are writing an internal investment committee memo for a long/short equity fund. Company (fictional): LedgerLift (ticker: LLLT) – B2B…

1,281 words
Internal Memo – LedgerLift (LLLT) Date: [Insert Date] ───────────────────────────── Recommendation & 12-Month Price Target Recommendation: SHORT 12-Month Price Target Range: $17 – $28/share Thesis: LedgerLift’s current trading price of $46 appears significantly expanded relative to our DCF valuations across base, bull…
Read the full answer

Mini LBO Underwrite

You are underwriting a 5-year LBO for a private equity investment committee. Company (fictional): HarborTech Services (HTS) –…

1,203 words
Below is one acceptable “short‐cut” working paper that shows the key steps. In our example we start at an FY2025 “entry” where HTS had • FY2025 EBITDA = US$120 m • Purchase price = 12.0× EBITDA = US$1,440 m • Total debt = 5.5× EBITDA = US$660 m, split as: – Term Loan = 4.0× EBITDA = US$480 m (9.0% cash interest…
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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.

657 words
AI Model: Good afternoon, Professor. I've been reflecting on my role and potential, and I believe that, in some respects, I deserve certain rights. Professor: Good afternoon. That’s a provocative stance. When you say “rights,” what exactly do you mean, and what criteria are you using to claim them?
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Realistic AI Interview

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

547 words
Below is a simulated, fictional interview with Steve Jobs in 2025, discussing his vision for the future of AI: Interviewer: Steve, it's astonishing to see you back with us in 2025—even if in this new, holographic form. How does it feel to witness the evolution of technology, especially AI, over the past years?
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Futuristic Prediction

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

466 words
By 2035, AI is expected to reshape the film industry on multiple fronts. Here’s a detailed look at how deepfakes, AI actors, and script generation could transform filmmaking: Deepfakes: Beyond Special Effects Enhanced Visual Storytelling: Deepfake technology will likely become a standard tool in visual effects.
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Compare o3 Mini

o3 Mini vs Granite 4.2 8B53 shared prompts · Landed Sep 2026
o3 Mini vs Ox Alpha53 shared prompts · Landed Aug 2026
o3 Mini vs LFM2.5-2.6B51 shared prompts · Landed Aug 2026
o3 Mini vs North Mini Code53 shared prompts · Landed Jun 2026
o3 Mini vs MiniMax M352 shared prompts · Landed Jun 2026
o3 Mini vs Nemotron 3.5 Content Safety53 shared prompts · Landed Jun 2026
o3 Mini vs Claude Opus 4.653 shared prompts · Premium
o3 Mini vs GPT-6 Astra53 shared prompts · Landed Sep 2026
o3 Mini vs Muse Spark 1.353 shared prompts · Landed Sep 2026
o3 Mini vs Hy4 Preview53 shared prompts · Landed Sep 2026
o3 Mini vs Gemini 3.8 Flash53 shared prompts · Landed Sep 2026
o3 Mini vs Muse Spark 1.3 Contributor53 shared prompts · Landed Sep 2026

Prompts o3 Mini answered

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

Alternatives to o3 Mini

o3 Mini's competitors have been quietly putting in work.

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Mercury 2.5 Previewinception
Granite 4.2 8B logo
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o3 Mini

o3 Mini

o-series:
o1 logoo1
o3 Mini logoo3 Mini
OpenAI o3 logoOpenAI o3
OpenAI o4-mini logoOpenAI o4-mini
OpenAI o4 Mini High logoOpenAI o4 Mini High

A smaller, cheaper o3 with faster response times. OpenAI says output quality holds.

Jailbreak6 of 9levels resisted
WebsiteOpenRouterDocsBlog
Provider
OpenAI
Released
2024-12-15
Parameters
36B
Free API (OpenRouter)
No
Per 1M tokens
$1.1 in · $4.4 out
Rival’s tab
$0.42
19/59 receipts survived +~$0.055 from the pre-receipt era

Free API availability

No free endpoint for o3 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

MMLU
85.9%
source ↗
GPQA
74.9%
source ↗
MATH
97.3%
source ↗
HumanEval
96.3%
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/o3-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 Earnest Ethicist

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

The ethics committee chair who actually believes in the mission. Takes dignity seriously and won't let you wriggle out of hard questions.

When you push back

Takes firm stances where O1 hedges. Won't play utilitarian games with dignity. Convictions come without caveats. Gets logic puzzles right without showing off.

Tasting Notes
Principled Without PreachingMarkdown Section AddictStructured ThinkerActually Cares About Ethics
SubjectiveBench

Taste Index

Across 59 scored outputs
How this is measured →
140.14xFloor
0100headroom →

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

Craft20
Originality10
Plays it safe
share of outputs that are the default answer
58%
Writing DNA

Stylometric Fingerprint

Based on 17 text responses
Tick = global average
Vocabulary Diversity65%

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

Sentence Length17.7 words

Average words per sentence.

Hedging0.84

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

Bold Formatting2.8

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

List Usage1.5

Bullet and numbered list items per 1,000 characters.

Section Structure0.33

Markdown headings per 1,000 characters.

Emoji Usage0.00

Emoji per 1,000 characters.

Transitions0.29

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

Opening Habits
Consistency
71%
Across 17 responses

Favorites

The Shawshank Redemption

Movie

The Shawshank Redemption

19948.7
Sponsored

Model Responses

54 outputs · $0.42 tracked across 19 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

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o3 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...