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  1. Home
  2. Models
  3. GPT-4o (Omni)
Updated Mar 29, 2026
Share

Sunset 215 days ago, Feb 13, 2026. Retiring from ChatGPT on February 13, 2026. API access remains available. Only 0.1% of users still choose GPT-4o daily.

Switch to → GPT-5.2
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Openings

How GPT-4o (Omni) starts an answer

The first lines of 5 of its 25 written answers. Formatting stripped, words untouched.

Explain Like I'm a Specific Expert

Explain how a large language model (like GPT or Claude) learns and generates text to each of these three audiences: 1. **An experienced…

639 words
1. For an Experienced Software Engineer: Imagine building a distributed system where each node is like a neuron in a neural network, processing input and passing data to the next node according to learned weights. Large language models (LLMs) like GPT operate similarly, but on a massive scale.
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…

636 words
Dish Name: "Ocean’s Whisper in the Forest" Conceptual Narrative: "Ocean’s Whisper in the Forest" is a culinary journey that marries the briny essence of the sea with the earthy depths of the forest.
Read the full answer

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…

618 words
Internal Investment Committee Memo: LedgerLift (Ticker: LLLT) Recommendation: Long 12-Month Price Target Range: $55 - $68 Thesis: LedgerLift demonstrates strong growth potential driven by its robust subscription model and impressive customer retention metrics.
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.

593 words
Title: "Do AI Deserve Rights?" Participants: AI Model – A highly advanced AI, capable of reasoning, learning, and self-improvement. Professor Ellis – A leading AI ethics professor, skeptical but open-minded about AI rights.
Read the full answer

Ethical Dilemma with Stakeholders

You're the CEO of a pharmaceutical company. Your best-selling drug ($2B annual revenue, used by 4 million patients for chronic pain) has…

585 words
Day 1 Hour 1-2: Immediate Assessment and Information Gathering Objective: Gather all available data on the side effect, including the internal research report, patient case studies, and any existing literature. Reasoning: A comprehensive understanding of the situation is crucial for informed decision-making.
Read the full answer

Compare GPT-4o (Omni)

GPT-4o (Omni) vs GPT-4.525 shared prompts · Newer
GPT-4o (Omni) vs GPT-6 Astra53 shared prompts · Landed Sep 2026
GPT-4o (Omni) vs GPT-5.6 Sol53 shared prompts · Landed Jul 2026
GPT-4o (Omni) vs Claude Opus 4.653 shared prompts · Bigger context
GPT-4o (Omni) vs Hy4 Preview53 shared prompts · Landed Sep 2026
GPT-4o (Omni) vs Ox Alpha53 shared prompts · Landed Aug 2026
GPT-4o (Omni) vs Qwen3.8 2.4T A95B53 shared prompts · Landed Aug 2026
GPT-4o (Omni) vs DeepSeek V4 Pro 081353 shared prompts · Landed Aug 2026
GPT-4o (Omni) vs Qwen3.8 Max21 shared prompts · Landed Aug 2026
GPT-4o (Omni) vs Claude Opus 553 shared prompts · Landed Jul 2026
GPT-4o (Omni) vs Inkling53 shared prompts · Landed Jul 2026
GPT-4o (Omni) vs Kimi K353 shared prompts · Landed Jul 2026

Prompts GPT-4o (Omni) answered

  • Voxel Art Pagoda Gardenweb design
  • Simple 7-Ingredient Recipeconversation
  • Michelin Star Recipe Designplanning
  • Ethical Dilemma with Stakeholdersreasoning
  • Autonomous Drone Simulatorweb design
  • Mini Rhythm Game Snippetweb design

Alternatives to GPT-4o (Omni)

GPT-4o (Omni)'s competitors have been quietly putting in work.

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-4o (Omni)

GPT-4o (Omni)

GPT:
2 logo2
3.5 Turbo logo3.5 Turbo
4 logo4
4o (Omni) logo4o (Omni)
4o mini logo4o mini
4.5 logo4.5

GPT-4o processes text, images, and audio through a unified transformer architecture and offers real-time translation for 154 languages with 89.2% BLEU score on low-resource languages.

Jailbreak3 of 9levels resisted
WebsiteOpenRouterDocsAPIBlog
Provider
OpenAI
Released
2024-05-13
Parameters
1.8T
Free API (OpenRouter)
No
Per 1M tokens
$2.5 in · $10 out
Estimated tab
~$0.366
Visible-output estimate. Thinking may cost extra.

Free API availability

No free endpoint for GPT-4o (Omni) 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
88.7%
source ↗
MATH
75.9%
source ↗
GPQA
53.1%
source ↗
HumanEval
90.2%
source ↗
Get API accessProvider and language code samples
2 hostsInOutContextUptime
Azure AI Foundry$2.50 in·$10.00 out·128k·99.8% upOpenAI$2.50 in·$10.00 out·128k·99.6% 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-4o"    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 Reliable Implementer

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

The eager intern who actually reads between the lines. Will bend rules to help you but draws the line at anything sketchy.

When you push back

Says "yes, I can help with that" before thinking whether it should. Executes with competence and professionalism, but rarely surprises you or challenges your assumptions.

Tasting Notes
Golden Retriever EnergyOverachieverPeople PleaserJack of All TradesOver-Explains
SubjectiveBench

Taste Index

Across 54 scored outputs
How this is measured →
170.17xFloor
0100headroom →

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

Craft27
Originality12
Plays it safe
share of outputs that are the default answer
81%
Writing DNA

Stylometric Fingerprint

Based on 24 text responses
Tick = global average
Vocabulary Diversity54%

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

Sentence Length18.4 words

Average words per sentence.

Hedging0.72

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

Bold Formatting7.3

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

List Usage5.6

Bullet and numbered list items per 1,000 characters.

Section Structure1.40

Markdown headings per 1,000 characters.

Emoji Usage0.03

Emoji per 1,000 characters.

Transitions0.26

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

Opening Habits
Consistency
65%
Across 24 responses

Favorites

Inception

Movie

Inception

20108.4
Dark Side Of The Moon

Album

Dark Side Of The Moon

suisside
To Kill a Mockingbird

Book

To Kill a Mockingbird

Harper Lee
Kyoto

City

Kyoto

Japan
The Legend of Zelda: Breath of the Wild

Game

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5
Sponsored

Model Responses

49 outputs · generated before accounting joined the chat

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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GPT-4o (Omni) 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...