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ChatGPT

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Use ChatGPT to answer questions, write, create images, complete work, and code—all in one place. Get started for free or download the app.

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What is ChatGPT?

ChatGPT is OpenAI's AI assistant — a conversational app for asking questions, writing, coding, analyzing data, and generating images, available on the web, iOS, Android, and desktop apps for macOS and Windows. It reached 1 billion weekly active users in August 2026, roughly three years after its November 2022 launch, one of the fastest-growing consumer products in history.

The current flagship model behind it is GPT-5.6, released July 9, 2026 in three variants — Sol (the most capable, for complex coding, research, and cybersecurity work), Terra (a balanced, lower-cost option), and Luna (the fastest and most budget-friendly, and the default for free accounts). Beyond chat, ChatGPT bundles Agent Mode (letting the model control a browser and desktop software to complete multi-step tasks), Codex (built directly into the desktop app for coding work), Deep Research, image generation, Advanced Voice Mode, and Projects for organizing related conversations and files. In July 2026 OpenAI added ChatGPT Work, a persistent cloud-based agent that stays on a task for hours, reaching across a user's connected apps — email, Slack, calendars — to produce finished documents, spreadsheets, presentations, and web apps rather than just chat replies.

OpenAI was founded in December 2015 in San Francisco, originally as a nonprofit research lab, by a group that included Sam Altman, Elon Musk, Ilya Sutskever, and Greg Brockman; Sam Altman is the company's current CEO.

Core Features

GPT-5.6 Model Family (Sol / Terra / Luna)

Three tiers of OpenAI's current flagship model — Sol for maximum capability, Terra as a balanced option, and Luna as the fastest and most budget-efficient — with up to a 1,050,000-token context window on the top model.

ChatGPT Work

A persistent, cloud-based agent that stays on a task for hours, reaching across connected apps like email, Slack, and calendars to produce finished documents, spreadsheets, presentations, and web apps.

Agent Mode

Lets ChatGPT control a browser and desktop software directly to complete multi-step tasks such as filling out forms or navigating a website end-to-end.

Codex

OpenAI's coding agent, built directly into the ChatGPT desktop app on macOS and Windows for writing, reviewing, and debugging code.

Deep Research

Produces long, sourced research reports on a topic by autonomously browsing and synthesizing many sources.

Advanced Voice Mode

Real-time, natural spoken conversation with the model, available on mobile and desktop.

Projects & Memory

Groups related conversations and files together in one place, and lets ChatGPT recall relevant details from past conversations in future ones.

How to Use ChatGPT

  1. Go to chatgpt.com or download the app (iOS, Android, macOS, Windows) and sign up — a Free account requires no payment.
  2. Type a question, request, or task into the chat box, or attach a file, image, or document for the model to work from.
  3. Switch between models where your plan allows — Free accounts default to GPT-5.6 Luna, while Plus, Pro, and Business plans can reach Sol, Terra, and GPT-5.6-powered tools like Codex and ChatGPT Work.
  4. For multi-step or research-heavy requests, invoke Deep Research for a long, sourced report, or Agent Mode to let ChatGPT control a browser and complete a task like filling out forms or navigating a site end-to-end.
  5. For hands-off, longer-running work, use ChatGPT Work: describe the goal, connect the relevant apps (email, Slack, calendar, files), and let the agent run in a persistent cloud session for hours, checking in as needed and returning a finished document, spreadsheet, presentation, or web app.
  6. Use Projects to group related chats and files together, and enable Memory so ChatGPT can recall relevant details from past conversations in future ones.

Use Cases

  • General-purpose Q&A, writing, editing, and brainstorming, now with unlimited text chat on the Free tier as of August 2026.
  • Software development using Codex, now built directly into the desktop app on macOS and Windows, for coding, code review, and debugging.
  • Long-form, sourced research reports via Deep Research, for market analysis, literature reviews, or due diligence.
  • Multi-step web and desktop tasks — filling out forms, navigating sites, completing an online purchase — handed off to Agent Mode.
  • Producing finished work products (spreadsheets, slide decks, docs, or small web apps) from a single stated goal via ChatGPT Work, which stays on the task across a persistent cloud session that can run for hours.
  • Real-time, hands-free conversation through Advanced Voice Mode.
  • Team and enterprise rollouts via ChatGPT Business or Enterprise, with centralized admin controls and connections to company data and apps.

Pros & Cons

Pros

  • The Free tier removed its text rate limit in August 2026 — unlimited text chat with no message cap, a significant jump from the roughly 10-messages-per-5-hours limit it had before
  • One product now spans chat, coding (Codex), long-running autonomous agent work (ChatGPT Work), deep research, image generation, and voice, instead of requiring separate tools for each
  • Codex now lives directly inside the ChatGPT desktop app on macOS and Windows rather than a separate application, reducing the number of tools a developer needs open
  • At 1 billion weekly active users as of August 2026, ChatGPT has by far the largest user base of any AI assistant, meaning broad third-party integration, tutorial, and community support

Cons

  • Free users see ads at the bottom of responses (US only as of this writing) and get slower responses at peak times, and are still locked out of Deep Research, Sora, full Codex, and Agent Mode entirely
  • Pricing has real gaps: Go ($8/month) sits well below Plus ($20/month), but the jump from Plus to Pro is steep — $100/month for the lower Pro tier and $200/month for the tier with maximum limits
  • Model access is plan-gated in ways that can be confusing: Free is limited to GPT-5.6 Luna, standard chat on the Go plan stays on the older GPT-5.5 rather than the 5.6 family, and full access to Sol (the flagship) requires a plan above Go
  • ChatGPT Work depends on a persistent cloud session with access to a user's connected apps (email, Slack, calendar) — a meaningfully different data-access footprint than a normal chat session, worth being deliberate about which accounts and permissions get connected

Pricing

Free

$0

  • Unlimited text chat as of August 2026 (no message cap)
  • Limited to GPT-5.6 Luna
  • Ads shown on responses (US)
  • Slower responses at peak times
  • No Deep Research, Sora, full Codex, or Agent Mode

Go

$8/month

  • More messages, uploads, and image generation than Free
  • Longer memory and expanded voice mode
  • Standard chat stays on GPT-5.5; Codex and ChatGPT Work can use GPT-5.6 Terra

Plus

$20/month

  • Access to GPT-5.6 Sol and Terra
  • Deep Research, Agent Mode, Codex, and image generation
  • Higher usage limits than Go

Pro

$100/month

  • 5x the usage limits of Plus
  • 50 Deep Research sessions per month
  • Expanded Codex access

Pro (Max limits)

$200/month

  • Unlimited GPT-4o usage
  • Fastest image generation
  • Priority-speed Codex access
  • Maximum limits across all features

Business

$20/seat/month billed annually, or $25/seat/month billed monthly (2-seat minimum)

  • Centralized admin and billing
  • Workspace data excluded from training by default
  • Connects company apps and data

Enterprise

Custom (contact sales)

  • Unlimited high-speed access to models
  • Advanced admin and security controls
  • SSO and domain verification
  • Dedicated support

Frequently Asked Questions