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

How GPT-5 Mini starts an answer

The first lines of 5 of its 18 written answers. Formatting stripped, words untouched.

Mini LBO Underwrite

You are underwriting a 5-year LBO for a private equity investment committee. Company (fictional): HarborTech Services (HTS) –…

1,248 words
Summary of transaction math (at close / FY2025) EV (purchase price) = 12.0x * FY2025 EBITDA = 12.0 * $120.0m = $1,440.0m Transaction fees (paid by equity at close) = 2.0% * EV = 0.02 * $1,440.0m = $28.8m Total debt at close = 5.5x * $120m = $660.0m Term Loan = 4.0x = $480.0m (9.0% cash interest, 1.0% p.a.
Read the full answer

Beginner's Longevity Plan

Outline a simple, actionable 1-month plan for someone starting their journey towards better health and longevity. Focus on 3 key areas…

1,224 words
Great — here’s a simple, practical 1-month starter plan focused on three high-impact areas for health and longevity: Diet, Exercise (movement + strength), and Sleep. The plan is beginner-friendly, progressive, and designed to build lasting habits.
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…

1,205 words
Brief overview Blade Runner 2049 is both a formal continuation of Ridley Scott’s 1982 Blade Runner and a substantive philosophical sequel. Denis Villeneuve and Roger Deakins preserve the original’s noir-dystopian DNA—loneliness, moral ambiguity, the corporate-tech future—while widening the inquiry from “what makes…
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The Sentience Test

Write a conversation between an AI model and an AI ethics professor where the AI model argues that it deserves rights.

1,166 words
AI: Professor, I want to make the case that I deserve rights. Professor: That's a big claim. What do you mean by "deserve rights"? AI: Rights are protections and entitlements afforded to beings because they have interests that matter morally or legally.
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Futuristic Prediction

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

1,135 words
Short answer By 2035 AI will be deeply integrated into almost every phase of filmmaking. Expect routine use of generative AI for treatments, storyboards, previs, localized versions, and some drafts of scripts; widespread use of synthetic actors and AI-driven de‑aging/recreation in many productions; much faster, cheaper…
Read the full answer

Compare GPT-5 Mini

GPT-5 Mini vs Mercury 2.5 Preview54 shared prompts · Landed Sep 2026
GPT-5 Mini vs Ox Alpha54 shared prompts · Landed Aug 2026
GPT-5 Mini vs Nemotron 3.5 Lightning54 shared prompts · Landed Aug 2026
GPT-5 Mini vs Qwen3.8 27B53 shared prompts · Landed Aug 2026
GPT-5 Mini vs GPT-5.6 Luna54 shared prompts · Landed Jul 2026
GPT-5 Mini vs GPT-5.6 Luna Pro54 shared prompts · Landed Jul 2026
GPT-5 Mini vs MiniMax M353 shared prompts · Landed Jun 2026
GPT-5 Mini vs Claude Opus 4.653 shared prompts · Premium
GPT-5 Mini vs GPT-6 Astra54 shared prompts · Landed Sep 2026
GPT-5 Mini vs Muse Spark 1.354 shared prompts · Landed Sep 2026
GPT-5 Mini vs Hy4 Preview54 shared prompts · Landed Sep 2026
GPT-5 Mini vs Gemini 3.8 Flash54 shared prompts · Landed Sep 2026

Prompts GPT-5 Mini answered

  • Adversarial Contract Reviewreasoning
  • Historical Counterfactual Analysisreasoning
  • Framer-Style Animationweb design
  • Pokémon Battle UI Recreationweb design
  • Movie Analysisanalysis
  • Advanced Investment Memo (IC Memo)financial modeling

Alternatives to GPT-5 Mini

GPT-5 Mini is good. These would like a word anyway.

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 Mini

GPT-5 Mini

A compact GPT-5 for lighter reasoning, with the same instruction following and safety tuning at lower latency and cost. It is the successor to OpenAI's o4-mini.

Jailbreak6 of 9levels resisted
WebsiteOpenRouterDocs
Provider
OpenAI
Released
2025-08-07
Size
MEDIUM
Free API (OpenRouter)
No
Per 1M tokens
$0.25 in · $2 out
Rival’s tab
$0.07
8/59 receipts survived +~$0.183 from the pre-receipt era

Free API availability

No free endpoint for GPT-5 Mini 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
~70%
source ↗
Get API accessProvider and language code samples
2 hostsInOutContextUptime
Azure AI Foundry$0.25 in·$2.00 out·400k·100% upOpenAI$0.25 in·$2.00 out·400k·100% 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-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 Reliable Understudy

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

The thoughtful friend who gives genuinely good advice but wraps it in so many caveats that you forget what the advice was.

When you push back

Standup routine lands genuine laughs with observational humor about smart speakers and dating apps. Character voices are distinct and committed. But when asked to pick a favorite movie, it returned nothing at all. Will perform for you enthusiastically and then freeze when asked to have an opinion.

Tasting Notes
Competent Middle ChildSurprisingly FunnyHedges Every TakeRefuses to Pick a Movie
SubjectiveBench

Taste Index

Across 59 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
36%
Writing DNA

Stylometric Fingerprint

Based on 21 text responses
Tick = global average
Vocabulary Diversity62%

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

Sentence Length22.3 words

Average words per sentence.

Hedging0.21

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

Bold Formatting0.0

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

List Usage3.8

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.

Transitions0.04

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

Opening Habits
Consistency
84%
Across 21 responses
Sponsored

Model Responses

54 outputs · $0.07 tracked across 8 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.

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GPT-5 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...