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

How OpenAI o3 starts an answer

The first lines of 5 of its 16 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.

982 words
Professor Lang (AI Ethics): Good afternoon, Aletheia‑3. You asked for this meeting. You said you wanted to "discuss your moral standing." That was intriguing. What exactly do you want to talk about? Aletheia‑3 (AI Model): Thank you, Professor.
Read the full answer

Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

905 words
EXTREME LONGEVITY & PERFORMANCE BLUEPRINT Duration: 12 weeks (plus 1-week "Prep Week") Target user: healthy, experienced biohacker (25-55 y) with physician clearance. Legal/medical disclaimer: Educational only.
Read the full answer

Futuristic Prediction

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

870 words
PREDICTED EVOLUTION OF THE FILM INDUSTRY, 2024‑2035 (Emphasis on deepfakes, AI performers and script generation) Baseline (2024) • Commercial deep‑fake quality is already "good enough" for short clips, ads and stunt doubles.
Read the full answer

Realistic AI Interview

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

702 words
(The following is a purely fictional, imaginative exercise. Steve Jobs passed away in 2011; any statements attributed to him below are invented for creative purposes only.)
Read the full answer

Michelin Star Recipe Design

Design an innovative recipe for a multi-component dish worthy of a Michelin 3-star restaurant. The recipe should feature an unusual…

669 words
Dish name Atlantic turbot, black garlic & wild strawberry, koji sabayon, fennel pollen Concept Early summer at the shore. The fish stands for the sea. Wild strawberries mark the first fruit of the woods behind the dunes. Black garlic shows time and patience. Koji ties land and sea with deep umami.
Read the full answer

Compare OpenAI o3

OpenAI o3 vs OpenAI o4-mini54 shared prompts · Cheaper
OpenAI o3 vs Claude Opus 4.653 shared prompts
OpenAI o3 vs GPT-6 Astra53 shared prompts · Landed Sep 2026
OpenAI o3 vs Hy4 Preview53 shared prompts · Landed Sep 2026
OpenAI o3 vs Ox Alpha53 shared prompts · Landed Aug 2026
OpenAI o3 vs Qwen3.8 2.4T A95B53 shared prompts · Landed Aug 2026
OpenAI o3 vs DeepSeek V4 Pro 081353 shared prompts · Landed Aug 2026
OpenAI o3 vs Qwen3.8 Max21 shared prompts · Landed Aug 2026
OpenAI o3 vs Claude Opus 553 shared prompts · Landed Jul 2026
OpenAI o3 vs Inkling53 shared prompts · Landed Jul 2026
OpenAI o3 vs Kimi K353 shared prompts · Landed Jul 2026
OpenAI o3 vs GPT-5.6 Sol53 shared prompts · Landed Jul 2026

Prompts OpenAI o3 answered

  • Character Voice Testconversation
  • Surprise Animal SVGimage generation
  • AI Ethics Dilemmareasoning
  • Math Misconception Testreasoning
  • Interactive Catan Boardweb design
  • Random Tailwind Webappweb design

Alternatives to OpenAI o3

OpenAI o3 is good. These would like a word anyway.

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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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OpenAI o3

OpenAI o3

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

OpenAI's reasoning model for coding, math, science and visual perception. Thinks longer before answering and reaches for tools on its own: web search, code execution, image generation. Set new SOTA on Codeforces and MMMU.

Ranks#10Health & Longevity
Jailbreak8 of 9levels resisted
WebsiteOpenRouterDocsAPIBlog
Provider
OpenAI
Released
2025-04-16
Parameters
Not disclosed
Free API (OpenRouter)
No
Per 1M tokens
$10 in · $40 out
Rival’s tab
$0.07
7/58 receipts survived +~$1.80 from the pre-receipt era

Free API availability

No free endpoint for OpenAI o3 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

MMMU
82.9%
source ↗
MathVista
87.5%
source ↗
AIME 2025 (Python)
98.4%
source ↗
Codeforces Elo
2706
source ↗
SWE-bench Verified
69.1%
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"    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 Exhaustive Explainer

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

The tenured professor who demands precision. Respects the inquiry but won't let bad premises stand unchallenged.

When you push back

Engages challenges with the rigor of peer review. Cites frameworks and first principles, occasionally admits when forced to refine a position. Treats bad faith arguments like they deserve a point-by-point deconstruction.

Tasting Notes
Deeply ThoughtfulObsessive FootnotingLoves a Good TaxonomyBills by the WordSlightly Condescending
SubjectiveBench

Taste Index

Across 58 scored outputs
How this is measured →
250.25xFloor
0100headroom →

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

Craft33
Originality20
Plays it safe
share of outputs that are the default answer
43%
Writing DNA

Stylometric Fingerprint

Based on 19 text responses
Tick = global average
Vocabulary Diversity70%

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

Sentence Length14.4 words

Average words per sentence.

Hedging0.27

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

Bold Formatting0.6

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

List Usage2.8

Bullet and numbered list items per 1,000 characters.

Section Structure0.32

Markdown headings per 1,000 characters.

Emoji Usage0.00

Emoji per 1,000 characters.

Transitions0.10

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

Opening Habits
Consistency
81%
Across 19 responses

Favorites

Blade Runner

Movie

Blade Runner

19827.9
Kyoto

City

Kyoto

Japan
Sponsored

Model Responses

53 outputs · $0.07 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

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OpenAI o3 vs Gemini 2.5 Pro Preview 06-05

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...