Tech & AI, Explained

chatgpt

11 min read

🇺🇸 USA · OpenAI ChatGPT

Status: 🟩 COMPLETE 🟦 LIVING Last updated: 2026-06-25 Plain-English tagline: The most-used AI chatbot in the world; OpenAI’s consumer flagship; the product that made “AI chat” a household concept in late 2022.

Front-matter facts

FieldValue
VendorOpenAI (San Francisco, USA)
Country / origin🇺🇸 USA
Recommended for Australian users?✅ Yes — fully accessible from AUS, AUD billing supported, no region locks on consumer tiers
Privacy summaryFree/Plus/Pro: trains on your chats by default — opt out in Settings → Data Controls. Team/Enterprise/Edu: never trains. API: never trains by default.
Free tierYes — limited daily GPT-5, voice mode, image generation (gpt-image-1), web search, file uploads, DALL-E (legacy)
Paid tiersPlus US200/mo · Team US$25-30/seat/mo (annual) · Enterprise quoted · Edu (university-licensed)
First released30 November 2022
Last reviewed2026-06-25
Official sitehttps://chatgpt.com

What it is

ChatGPT is OpenAI’s consumer-facing chat product — a website (chatgpt.com), a desktop app (Mac, Windows), and mobile apps (iOS, Android) that let you type or speak to an AI and get conversational answers. Under the hood, it talks to OpenAI’s GPT-family models (currently the GPT-5 family for most tasks; older GPT-4 and o-series models still selectable in some tiers).

It launched on 30 November 2022 and reached 100 million users in two months — the fastest-growing consumer software product in history at the time. As of mid-2026 it’s used by an estimated 600+ million weekly active users.

Analogy: if Google is “ask the internet a question,” ChatGPT is “have a conversation with a knowledgeable assistant who can also write, draw, code, read your documents, and (in voice mode) talk back.”

What you’d use it for

  • General-purpose chat — questions, brainstorming, explanations of anything
  • Writing help — emails, essays, reports, blog posts, code documentation
  • Coding — generating, debugging, explaining, refactoring code
  • Image generation — type a description, get an image (uses the gpt-image-1 model, often called “Image” or marketed as “GPT Image 2.0”)
  • Image understanding — upload a screenshot, photo, or diagram and ask questions about it
  • Document analysis — upload a PDF, Word doc, spreadsheet, get summaries and Q&A
  • Web search — ChatGPT can browse the internet for current information (free + paid)
  • Voice conversation — Advanced Voice Mode for spoken back-and-forth
  • Deep Research — long-running research that produces multi-page reports with citations (paid)
  • Sora video — generate short videos from a text prompt (Plus/Pro)
  • GPTs — custom mini-assistants tailored to specific tasks (free to use; building requires Plus)
  • Operator / ChatGPT Agent — agent that can browse the web and perform tasks on your behalf (Pro)
  • Pulse — proactive daily briefings about topics you care about (Pro)

How to sign up + first 5 minutes from Australia

  1. Open chatgpt.com in any browser. Or download “ChatGPT” from the App Store (iOS), Google Play (Android), or chat.openai.com/download (Mac/Windows desktop).
  2. Click Sign up (top right). Use your Gmail, Apple ID, Microsoft account, or any email.
  3. Verify your email (check your inbox for the confirmation link).
  4. Enter your name and date of birth. Real date of birth matters — some features are age-gated.
  5. Enter your Australian mobile number (+61) for SMS verification. Code arrives in seconds.
  6. You’re now on the free tier. You can immediately use GPT-5, voice mode, image generation, web search, file uploads, all with daily limits.
  7. Try one of these to see what it can do:
    • Type “Explain to me what’s happening in Australian politics this week” (uses Search)
    • Upload a photo and ask “What’s in this image?” (uses Vision)
    • Click the headphones icon and have a voice conversation
    • Type “Make me an image of a cockatoo wearing a Akubra” (uses gpt-image-1)
  8. Optional — upgrade to Plus. Click your profile → Upgrade → ChatGPT Plus. AUD card / Apple Pay / Google Pay all work. US$20/mo + 10% GST. You can cancel any time (Settings → Subscription → Manage).

What it costs — what you actually get

Free tier

  • GPT-5 — limited daily messages, then rolls down to a smaller GPT-5 mini variant
  • Voice mode (standard, not Advanced) — limited
  • Image generation (gpt-image-1) — a few per day
  • File uploads — limited per day
  • Web search — generous
  • ChatGPT Memory — basic
  • DALL-E 3 (legacy) — limited
  • No Sora, no Pulse, no Operator/Agent, no Deep Research (or very limited preview)

Plus — US36–38 incl GST)

  • GPT-5 with much higher daily limits
  • Access to legacy models (GPT-4o, o3, others) via model picker
  • Advanced Voice Mode (full, with limits)
  • Image generation — much higher quota
  • File uploads — higher quota
  • Sora video generation — generous monthly quota
  • Deep Research — small monthly quota
  • ChatGPT Canvas (long-form writing surface)
  • GPTs — full access, including building your own
  • Custom Instructions + full Memory

Pro — US350–360 incl GST)

  • Everything in Plus, much higher limits
  • Unlimited Advanced Voice
  • GPT-5 Pro (enhanced reasoning variant)
  • Operator / ChatGPT Agent (browser-based agent that can complete real tasks)
  • Pulse (proactive daily briefings)
  • Sora — generous quota, longer videos, higher quality
  • Deep Research — significantly higher quota
  • For power users who hit Plus limits frequently

Team — US30 (monthly)

  • Everything in Plus
  • No training on your data (this is the key business feature)
  • Shared workspace and GPTs
  • SAML SSO
  • Higher message limits
  • Admin console

Enterprise — quoted

  • Everything in Team
  • Unlimited GPT-5
  • Higher security, SOC 2, HIPAA-eligible, data residency options
  • Long-term retention policy control
  • Audit logs, customer-managed encryption keys
  • Priority support

Edu — for higher education

  • Special pricing for universities; deployed across campus

Hidden costs to know about

  • App Store subscriptions are the same price as web (OpenAI eats the Apple cut for now)
  • Cancelling cleanly works from the platform you subscribed on (web → web; iOS → iOS Settings → Subscriptions)
  • GST is added to AUS-billed invoices; if you have an ABN, register it in Settings → Billing for tax-invoice handling
  • A separate API subscription exists at platform.openai.com — that’s NOT covered by ChatGPT Plus; API usage is metered

How it compares to alternatives

CapabilityChatGPT PlusClaude ProGemini AI Pro
Daily-driver chat qualityExcellent (GPT-5)Excellent (Claude Sonnet 4.6)Excellent (Gemini 3 Pro)
CodingStrong; great for one-off snippetsBest for long sessions (Claude Code)Strong; tight Google ecosystem
Long-document handling256K tokens1M tokens1M tokens
Image generationBuilt-in (gpt-image-1)No native; via integrationsBuilt-in (Imagen)
Video generationSora (built-in)NoVeo (built-in)
Voice modeBest in class (Advanced Voice)Good (rolling out)Good (Gemini Live)
Deep research modeYes, polishedYes (Research)Yes (Deep Research)
Built-in browser/web searchYesYesBest Google integration
Memory across chatsYesYesYes
Custom assistantsGPTs (most-developed)Projects + SkillsGems
Browser agentOperator / Agent (Pro)Computer Use (API)Project Astra (preview)
Workspace integrationLimitedLimitedDeepest (Workspace)
Price (consumer top tier)US$20US$20US$19.99
Family planNoNoYes (via Google One AI Pro)

If you’re picking ONE: ChatGPT is the safest “covers most ground” choice. Claude is preferred by many for thoughtful long-form writing and serious coding (especially via Claude Code). Gemini wins if you live in Google Workspace.

See claude-vs-chatgpt-vs-gemini.md 🟥 for the deeper comparison.

Privacy / data handling deep dive

Free + Plus + Pro: OpenAI uses your conversations to train future models by default. The text you type and the responses ChatGPT gives back are sampled (after filtering for personal information) into the training dataset for the next model.

To opt out:

  1. Profile (top right) → Settings
  2. Data Controls
  3. Improve the model for everyone → toggle OFF

Once off, your future conversations are NOT used for training. Past conversations that were already sampled may still be in existing models — that can’t be retroactively removed.

Temporary Chat mode: click the speech-bubble icon at the top of any new conversation, choose “Temporary Chat.” Conversations in this mode:

  • Are never used for training
  • Don’t appear in your chat history
  • Are deleted from OpenAI’s servers after 30 days (kept that long for abuse-monitoring only)

Use Temporary Chat for sensitive one-offs (health questions, financial details, personal struggles, confidential work).

Team / Enterprise / Edu: OpenAI does NOT train on your data. Contractually committed. Tenant-isolated.

API: OpenAI does NOT train on your data since March 2023. Inputs are stored for 30 days for abuse-monitoring, then deleted (unless you’re flagged).

Memory: ChatGPT remembers facts about you across conversations (“user lives in Sydney,” “user is working on a Bible study app”). Found in Settings → Personalization → Memory. You can view, delete individual memories, or turn it off entirely.

Data retention: chat history is retained indefinitely by default. To delete: Settings → Data Controls → Delete all chats. To export: Settings → Data Controls → Export data (you get a ZIP of everything).

Where data lives: US data centres for consumer tiers. Enterprise can negotiate EU data residency. Asia-Pacific (including AUS) residency is generally NOT available for ChatGPT consumer.

Australian Privacy Act: OpenAI is subject to the Australian Privacy Act when handling Australian personal information. They publish a Privacy Policy meeting the Australian Privacy Principles. If you’re using ChatGPT for business and customer data flows through it, document this in your privacy policy under APP 8 (cross-border data flows).

See privacy-and-data-training.md 🟩 🟦 for the comparative deep dive.

Recent changes (since the last review)

  • June 2026: GPT-5 Pro reasoning variant added to Pro tier (slower, more reliable for hard tasks)
  • May 2026: ChatGPT Pulse (proactive daily briefings) launched to Pro tier
  • April 2026: Sora 2 / Sora Turbo replaced Sora 1 in Plus and Pro; faster, longer clips, better physics
  • March 2026: GPT-5 family launched (GPT-5, GPT-5 mini, GPT-5 nano, GPT-5 Pro); replaced GPT-4o as the daily default
  • February 2026: ChatGPT Agent (browser-based agent) launched in Pro
  • Late 2025: Operator launched (now consolidated under ChatGPT Agent)
  • Late 2025: Advanced Voice Mode generally available to all paid tiers

(For the latest changes, check help.openai.com/en/articles/6825453-chatgpt-release-notes — OpenAI maintains a public release-notes page.)

Gotchas

  • The free tier “rolls down” silently. When you hit your daily limit on GPT-5, ChatGPT keeps responding but with a smaller model. Watch the model name shown above each response to know what you’re actually getting.
  • Sora and image generation use separate quotas from chat. You can run out of Sora while still having chat capacity.
  • Memory can get cluttered. ChatGPT will remember random one-off facts you didn’t mean as “always-remember.” Check Memory occasionally and prune.
  • Custom Instructions are global to your account. If you set “always respond in formal Australian English,” every chat uses that. Override per-chat in the chat itself.
  • GPTs you create are private by default; sharing makes them public to anyone with the link or the GPT Store. Don’t paste confidential prompts/instructions into a GPT you intend to share.
  • The GPT Store can serve “ChatGPT lookalike” GPTs built by third parties. The real ChatGPT is the OpenAI-built core, not a third-party GPT named “ChatGPT 5 Pro Max Ultra.”
  • Browser sessions log out frequently on some browsers, especially Safari with strict privacy settings. Use the desktop app to avoid re-signing-in constantly.
  • Web search results can include outdated or low-quality sources. ChatGPT’s search picks pages by some quality heuristic but isn’t perfect — verify time-sensitive facts.
  • Code suggestions can hallucinate APIs. GPT-5 is better than predecessors but will occasionally invent library functions that don’t exist. Always run the code, don’t trust it sight-unseen.
  • App Store subscriptions are managed in iOS Settings, not in the ChatGPT app. If you signed up on iPhone, cancel there — not on the chatgpt.com website.
  • “Sign in with Google” creates a separate account from a “sign in with email.” If you accidentally make both, your chat history will be split across two accounts.
  • ChatGPT will sometimes refuse requests that are perfectly reasonable (medical questions, legal questions, anything it interprets as sensitive). Rephrase, or try another tool. Don’t take the refusal as definitive.
  • Cost surprises with the API are common. The Plus subscription does NOT cover API usage. If you build something that calls the OpenAI API, that’s billed separately at platform.openai.com.

See also

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