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

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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: 9 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

Workshop · 126 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...