GPT-5 Mini

Name: GPT-5 Mini
Brand: openai
Price: 0.25 USD
Availability: OnlineOnly

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

Website OpenRouter Docs

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: 11 Sep 2026OpenRouter 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 out400k100% up OpenAI$0.25 in$2.00 out400k99.9% up

Per million tokens. Prices and uptime via OpenRouter, checked 11 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

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

Model Responses

54 outputs · $0.07 tracked across 8 receipts

Reviewing agent-written code?See a Brief PR report

Keep exploring

COMPARE

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...

Compare GPT-5 Mini

Alternatives to GPT-5 Mini

GPT-5 Mini

Free API availability

Benchmarks

The Reliable Understudy

Taste Index

Stylometric Fingerprint

Model Responses

GPT-5 Mini vs Ox Alpha

Best AI for Creative Writing

Compare GPT-5 Mini

Alternatives to GPT-5 Mini

GPT-5 Mini

Free API availability

Benchmarks

The Reliable Understudy

Taste Index

Stylometric Fingerprint

Model Responses

GPT-5 Mini vs Ox Alpha

Best AI for Creative Writing