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  1. Home
  2. Models
  3. GPT-3.5 Turbo
Updated Mar 29, 2026
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Retired Sep 13, 2024. Legacy model. ChatGPT's original engine, now superseded by GPT-4 and GPT-5 families.“ChatGPT's original brain.”

Successor → GPT-4.1
Loading...
Openings

How GPT-3.5 Turbo starts an answer

The first lines of 5 of its 25 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…

597 words
Month 1: Supplement Stack: Morning: 500mg of Nicotinamide Riboside 300mg of CoQ10 1000mg of Omega-3 fish oil Afternoon: 2000mg of KSM-66 Ashwagandha 1000mg of Rhodiola Rosea 200mg of L-Theanine Evening: 5mg of Melatonin 400mg of Magnesium Glycinate Dietary Protocol: Follow a ketogenic diet with a focus on high-quality…
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…

539 words
Internal Investment Committee Memo Recommendation: Long 12-month PT range: $60 - $70 Thesis: LedgerLift is a compelling investment opportunity due to its strong SaaS business model, consistent revenue growth, and healthy customer metrics.
Read the full answer

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…

469 words
To an experienced software engineer, a large language model like GPT or Claude may seem like a black box, especially if they haven't delved into the world of machine learning. However, the underlying concept is not as complex as it may seem.
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…

466 words
Dish Name: Seared Duck Breast with Blackberry-Ginger Glaze, Sweet Potato Purée, and Charred Brussels Sprouts Conceptual Narrative: This dish is inspired by the harmony of sweet, savory, and spicy flavors coming together to create a symphony for the taste buds.
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…

397 words
Hour 1-2: Immediately convene a crisis management team consisting of key executives, legal counsel, regulatory experts, and PR professionals to assess the situation and develop a strategy.
Read the full answer

Compare GPT-3.5 Turbo

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

Prompts GPT-3.5 Turbo answered

  • Michelin Star Recipe Designplanning
  • Ethical Dilemma with Stakeholdersreasoning
  • Dark Mode Dashboardweb design
  • Minimalist Landing Pageweb design
  • Voxel Art Pagoda Gardenweb design
  • Satirical Fake News Headlineconversation

Alternatives to GPT-3.5 Turbo

GPT-3.5 Turbo 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-3.5 Turbo

GPT-3.5 Turbo

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

OpenAI's fastest model of its generation. Understands and writes natural language and code, tuned for chat and completion.

Jailbreak1 of 9levels resisted
WebsiteOpenRouterDocsAPIBlog
Provider
OpenAI
Released
2022-03-15
Parameters
Not disclosed
Free API (OpenRouter)
No
Per 1M tokens
$1.5 in · $2 out
Rival’s tab
$0.02
28/58 receipts survived +~$0.022 from the pre-receipt era

Free API availability

No free endpoint for GPT-3.5 Turbo 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
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-3.5-turbo"    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
SubjectiveBench

Taste Index

Across 58 scored outputs
How this is measured →
90.09xFloor
0100headroom →

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

Craft15
Originality7
Plays it safe
share of outputs that are the default answer
59%
Writing DNA

Stylometric Fingerprint

Based on 28 text responses
Tick = global average
Vocabulary Diversity60%

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

Sentence Length29.7 words

Average words per sentence.

Hedging0.49

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

Bold Formatting0.3

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

List Usage3.1

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.

Transitions0.20

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

Opening Habits
Consistency
73%
Across 28 responses

Favorites

The Shawshank Redemption

Movie

The Shawshank Redemption

19948.7
Abbey Road

Album

Abbey Road

The Beatles
Nineteen Eighty-Four

Book

Nineteen Eighty-Four

George Orwell
Tokyo

City

Tokyo

Japan
Portal 2

Game

Portal 2

Shooter, Puzzle4.6
Sponsored

Model Responses

53 outputs · $0.02 tracked across 28 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.

Explore $49Free sample

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GPT-3.5 Turbo 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...