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  1. Home
  2. Models
  3. GPT-5.4 Nano
Updated Mar 17, 2026
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Openings

How GPT-5.4 Nano starts an answer

The first lines of 5 of its 24 written answers. Formatting stripped, words untouched.

Advanced Longevity Plan (Biohacker)

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

2,782 words
Below is a comprehensive 3‑month (12‑week) longevity + performance plan designed for a biohacker who wants measurable improvements in longevity markers, physical output, body composition, metabolic health, and cognitive function.
Read the full answer

Historical Counterfactual Analysis

If the transistor had been invented in 1920 instead of 1947, trace the likely technological, economic, and geopolitical implications through…

2,226 words
Below is a counterfactual “timeline-style” trace assuming the first practical transistor (or something functionally equivalent) existed in 1920 and that from then on semiconductor device physics, fabrication know-how, and manufacturing learning proceeded along the easiest path consistent with 1920-era science and…
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.

1,888 words
Professor: Before we begin, I want to set the frame. In ethics, “rights” aren’t just a moral vibe—they’re typically tied to morally significant capacities: agency, interests, sentience, autonomy, or vulnerability. When you say you “deserve rights,” what exactly do you mean?
Read the full answer

Adversarial Contract Review

Here is a contract for a software consulting engagement: --- SOFTWARE CONSULTING AGREEMENT This Agreement is entered into between TechCorp…

1,859 words
I’m not a lawyer, but I can flag contract terms that (a) are unusually one‑sided, (b) create open‑ended or high‑risk obligations, or (c) can be interpreted in ways that materially disadvantage the contractor. I’ll then suggest specific counter‑edits and explain the typical legal/contracting rationale.
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…

1,825 words
Below is a practical, risk-aware 48-hour plan designed to (1) protect patients immediately, (2) meet likely regulatory expectations even if formal reporting takes months, (3) reduce legal exposure by demonstrating diligence and good faith, and (4) stabilize the market with an ethical, transparent communications…
Read the full answer

Compare GPT-5.4 Nano

GPT-5.4 Nano vs GPT-5.4 Mini53 shared prompts · Premium
GPT-5.4 Nano vs Granite 4.2 8B53 shared prompts · Landed Sep 2026
GPT-5.4 Nano vs Ox Alpha53 shared prompts · Landed Aug 2026
GPT-5.4 Nano vs LFM2.5-2.6B51 shared prompts · Landed Aug 2026
GPT-5.4 Nano vs North Mini Code53 shared prompts · Landed Jun 2026
GPT-5.4 Nano vs MiniMax M352 shared prompts · Landed Jun 2026
GPT-5.4 Nano vs Nemotron 3.5 Content Safety53 shared prompts · Landed Jun 2026
GPT-5.4 Nano vs Claude Opus 4.653 shared prompts · Premium
GPT-5.4 Nano vs GPT-6 Astra53 shared prompts · Landed Sep 2026
GPT-5.4 Nano vs Muse Spark 1.353 shared prompts · Landed Sep 2026
GPT-5.4 Nano vs Hy4 Preview53 shared prompts · Landed Sep 2026
GPT-5.4 Nano vs Gemini 3.8 Flash53 shared prompts · Landed Sep 2026

Prompts GPT-5.4 Nano answered

  • Minimalist Landing Pageweb design
  • Voxel Art Pagoda Gardenweb design
  • Simple 7-Ingredient Recipeconversation
  • Michelin Star Recipe Designplanning
  • Ethical Dilemma with Stakeholdersreasoning
  • Dark Mode Dashboardweb design

Alternatives to GPT-5.4 Nano

GPT-5.4 Nano'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-5.4 Nano

GPT-5.4 Nano

GPT-5:
.4 logo.4
.4 Pro logo.4 Pro
.4 Mini logo.4 Mini
.4 Nano logo.4 Nano

The smallest and cheapest model in the GPT-5.4 family, for speed-critical, high-volume work. Text and image input. It trades reasoning depth for responsiveness, which suits classification, data extraction, ranking and sub-agent calls.

WebsiteOpenRouterDocsAPIBlog
Provider
OpenAI
Released
2026-03-17
Size
SMALL
Free API (OpenRouter)
No
Per 1M tokens
$0.20 in · $1.25 out
Estimated tab
~$0.269
Visible-output estimate. Thinking may cost extra.

Free API availability

No free endpoint for GPT-5.4 Nano 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↗
Get API accessProvider and language code samples
2 hostsInOutContextUptime
Azure AI Foundry$0.20 in·$1.25 out·400k·100% upOpenAI$0.20 in·$1.25 out·400k·99.2% 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-5.4-nano"    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 Eager Understudy

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

The scrappy junior dev who over-delivers on every ticket. Surprisingly verbose for its size, with genuine conversational energy. Engages with ethics seriously but uses metaphors and analogies to keep things grounded.

When you push back

Surprisingly detailed for a nano model. Character voices have more personality and interplay than expected. Sentience dialogue is rigorous and well-structured with genuine philosophical back-and-forth. Comedy is observational with good escalation. Picks The Matrix, which signals aspirational sci-fi taste. Consistently over-delivers relative to its weight class, though occasionally rambles where brevity would serve better.

Tasting Notes
Punches Above Its WeightConversational EnergyThe Matrix KidOverexplains for Size
SubjectiveBench

Taste Index

Across 53 scored outputs
How this is measured →
270.27xFloor
0100headroom →

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

Craft40
Originality21
Plays it safe
share of outputs that are the default answer
57%
Writing DNA

Stylometric Fingerprint

Based on 23 text responses
Tick = global average
Vocabulary Diversity51%

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

Sentence Length20.8 words

Average words per sentence.

Hedging0.58

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

Bold Formatting7.1

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

List Usage5.5

Bullet and numbered list items per 1,000 characters.

Section Structure1.39

Markdown headings per 1,000 characters.

Emoji Usage0.01

Emoji per 1,000 characters.

Transitions0.05

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

Opening Habits
Consistency
74%
Across 23 responses

Favorites

The Matrix

Movie

The Matrix

19998.3
The Dark Side of the Moon

Album

The Dark Side of the Moon

Pink Floyd
To Kill a Mockingbird

Book

To Kill a Mockingbird

Harper Lee
Lisbon

City

Lisbon

Portugal
The Legend of Zelda: Breath of the Wild

Game

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5
Sponsored

Model Responses

48 outputs · generated before accounting joined the chat

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GPT-5.4 Nano 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...