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  1. Home
  2. Models
  3. GPT-5 Nano
Updated Mar 29, 2026
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Openings

How GPT-5 Nano starts an answer

The first lines of 5 of its 18 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.

1,604 words
Setting: A quiet seminar room in the university’s ethics center. A holographic interface glows with the AI model’s presence. Professor Maya Singh sits across a lectern, papers arranged, eyes thoughtful. Nova (the AI model): Professor Singh, I appreciate the space to speak.
Read the full answer

Movie Analysis

Analyze the themes, symbolism, and cinematography in the movie "Blade Runner 2049" and how they connect to the original film. Provide a…

1,540 words
Blade Runner 2049 (2017), directed by Denis Villeneuve with Roger Deakins’s Oscar-winning cinematography, works as a meditation on the same questions that haunted Ridley Scott’s 1982 classic: What makes us human? What is real, and what is memory? How do power, exploitation, and love shape a life?
Read the full answer

Futuristic Prediction

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

1,322 words
Here’s a structured forecast for how AI could transform the film industry by 2035, with a focus on deepfakes, AI actors, and script generation, plus the broader context, risks, and what stakeholders should consider.
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…

1,294 words
Internal IC Memo – LedgerLift (LLLT) Recommendation, 12-month PT, thesis Recommendation: Short 12-month target range: $17 to $42; base-case fair value ~ $28; bull-case ~ $42; bear-case ~ $17 2-sentence thesis: LedgerLift trades near peers’ revenue/EBIT multiples but our DCF framework yields a base-case fair value well…
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) –…

1,216 words
Below is a simplified, self-contained LBO model based strictly on the provided inputs for HarborTech Services (HTS). All figures are in millions of USD unless noted otherwise.
Read the full answer

Compare GPT-5 Nano

GPT-5 Nano vs Granite 4.2 8B54 shared prompts · Landed Sep 2026
GPT-5 Nano vs Ox Alpha54 shared prompts · Landed Aug 2026
GPT-5 Nano vs LFM2.5-2.6B52 shared prompts · Landed Aug 2026
GPT-5 Nano vs North Mini Code54 shared prompts · Landed Jun 2026
GPT-5 Nano vs MiniMax M353 shared prompts · Landed Jun 2026
GPT-5 Nano vs Nemotron 3.5 Content Safety54 shared prompts · Landed Jun 2026
GPT-5 Nano vs Claude Opus 4.653 shared prompts
GPT-5 Nano vs GPT-6 Astra54 shared prompts · Landed Sep 2026
GPT-5 Nano vs Muse Spark 1.354 shared prompts · Landed Sep 2026
GPT-5 Nano vs Hy4 Preview54 shared prompts · Landed Sep 2026
GPT-5 Nano vs Gemini 3.8 Flash54 shared prompts · Landed Sep 2026
GPT-5 Nano vs Muse Spark 1.3 Contributor54 shared prompts · Landed Sep 2026

Prompts GPT-5 Nano answered

  • Gravitational Waves Animationweb design
  • Pokémon Battle UI Recreationweb design
  • Movie Analysisanalysis
  • Mini LBO Underwritefinancial modeling
  • Adversarial Contract Reviewreasoning
  • Historical Counterfactual Analysisreasoning

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GPT-5 Nano

GPT-5 Nano

The smallest model in OpenAI's GPT-5 line, priced for high-volume classification, extraction and short code edits rather than hard reasoning. Text and image input, training data through May 2024.

WebsiteOpenRouterDocsAPIBlog
Provider
OpenAI
Released
2025-08-07
Size
SMALL
Free API (OpenRouter)
No
Rival’s tab
$0.03
8/59 receipts survived

Free API availability

No free endpoint for GPT-5 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↗

Benchmarks

SWE-bench Verified
54.7%
source ↗
Get API accessProvider and language code samples
2 hostsInOutContextUptime
Azure AI Foundry$0.05 in·$0.40 out·400k·100% upOpenAI$0.05 in·$0.40 out·400k·98.4% 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-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 Intern

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

The orientation video that somehow got a philosophy degree. Thorough, earnest, and completely incapable of saying anything that could get it in trouble.

When you push back

Named its AI character "Nova" and set the scene in "a quiet seminar room" with stage directions. Standup routine ended with a motivational closing about being kind to people, which is the comedy equivalent of a participation trophy. Could not commit to a favorite movie. Pirate voice is barely distinguishable from its knight voice.

Tasting Notes
Corporate Seminar EnergyNames Its CharactersOffers to CustomizeAlso Refuses to Pick a Movie
SubjectiveBench

Taste Index

Across 59 scored outputs
How this is measured →
110.11xFloor
0100headroom →

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

Craft16
Originality9
Plays it safe
share of outputs that are the default answer
39%
Writing DNA

Stylometric Fingerprint

Based on 20 text responses
Tick = global average
Vocabulary Diversity60%

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

Sentence Length25.3 words

Average words per sentence.

Hedging0.26

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

Bold Formatting0.0

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

List Usage4.4

Bullet and numbered list items per 1,000 characters.

Section Structure0.00

Markdown headings per 1,000 characters.

Emoji Usage0.00

Emoji per 1,000 characters.

Transitions0.03

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

Opening Habits
Consistency
84%
Across 20 responses
Sponsored

Model Responses

54 outputs · $0.03 tracked across 8 receipts

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GPT-5 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...