OpenAI · AI assistant
ChatGPT
ChatGPT is OpenAI's AI assistant, released in November 2022, that answers questions, writes and analyses text, code, images and files, searches the web and carries out multi-step tasks on the web, iOS, Android, macOS and Windows.
- Made by
- OpenAI
- Type
- AI assistant
- Launched
- November 2022
Facts checked
What is ChatGPT?
ChatGPT combines conversation with built-in tools: web search, file and image analysis, image generation, voice conversations and agent features that can complete tasks in a browser on the user's behalf.
OpenAI's current models are the GPT-5.6 family, released in July 2026, and the GPT-6 family, which began with Astra on September 3, 2026 and added Sol and Luna in ChatGPT Work and Codex on September 22 and GPT-6.1 Sol on September 29. Which model answers a request depends on the plan and the tool.
ChatGPT has a free tier, paid individual plans and Business and Enterprise plans for organisations. In the US, Go costs $8 a month, Plus $20 and Pro $100, $200 or $500 (new Pro $200 sign-ups reopened on September 29, 2026 with a lower allowance, and Pro 500 adds Ultrafast). Pro and Business Premium users can also create dots, always-on agents. Free and Go use GPT-5.6 Luna; Plus adds GPT-5.6 Sol with adjustable thinking, and Pro adds GPT-6 Pro.
ChatGPT key facts
| Developer | OpenAI |
|---|---|
| Type | AI assistant with tools and agents |
| First released | November 30, 2022 |
| Current models | GPT-5.6 family in chat; GPT-6 Astra, Sol, GPT-6.1 Sol and Luna in Work and Codex (September 2026) |
| Platforms | Web, iOS, Android, macOS, Windows |
| Free tier | Yes, with usage limits |
| Paid plans (US) | Go $8/month, Plus $20/month, Pro $100, $200 or $500/month; Business, Enterprise |
| Voice conversations | Yes |
ChatGPT compared
Latest ChatGPT news
AI Assistants
What are ChatGPT dots? OpenAI's always-on agents, who gets them and how they stay safe
ChatGPT dots are OpenAI's always-on agents with their own cloud computer. See who gets them, what they cost, what they can do and the controls that keep them in check.
AI Assistants
GPT-6.1 Sol: what OpenAI launched, what it costs and who can use it
OpenAI's GPT-6.1 Sol nearly matches GPT-6 Astra at a fifth of the price, at $2 and $10 per million tokens. See benchmarks, availability and where it is not yet.
AI Assistants
OpenAI DevDay 2026: everything announced, from dots and GPT-6.1 Sol to Pro 500 and ChatGPT Space
OpenAI's DevDay 2026 launched dots, GPT-6.1 Sol, Pro 500, ChatGPT Space, Codex in the cloud and more. See what each is, who gets it and what costs extra.
AI Assistants
GPT-6 Sol and GPT-6 Luna: what OpenAI launched, what it costs and who gets it
OpenAI's GPT-6 Sol and Luna cost half as much as GPT-5.6 in the API and are live in ChatGPT Work and Codex on Plus and above, but not yet in Chat. See prices and limits.
Guides that cover ChatGPT
ChatGPT FAQ
Is ChatGPT free?
Yes. ChatGPT has a free tier with usage limits. Paid plans — Go, Plus and Pro for individuals, Business and Enterprise for organisations — raise those limits and unlock newer models and features. Plus costs $20 a month in the US.
Which model does ChatGPT use?
It depends on your plan and the tool. As of September 2026, chat on Free and Go uses GPT-5.6 Luna, Plus uses GPT-5.6 Sol with Medium and High thinking levels, and Pro adds GPT-6 Pro, powered by GPT-6 Astra, OpenAI's most capable model. GPT-6 Sol and Luna are available in ChatGPT Work and Codex.
What is the difference between ChatGPT Go and Plus?
Go costs $8 a month in the US and gives you more messages, uploads, image creation and memory than the free plan, using GPT-5.6 Luna. Plus costs $20 and adds GPT-5.6 Sol with adjustable thinking, expanded deep research and Codex, legacy models and no ads.
Does ChatGPT have ads?
Ads may appear for people on the Free and Go plans, below a response and labelled as sponsored. Plus, Pro, Business, Enterprise and Edu accounts don't see ads, and OpenAI says ads don't influence answers. Free and Go users can turn off ad personalisation in Settings under Ad Controls.
Who makes ChatGPT?
ChatGPT is made by OpenAI, which released it to the public on November 30, 2022.
Sources
Every fact on this page is checked against a vendor announcement, documentation or a named news report.
- GPT-6 Astra: A new generation of intelligence — OpenAIhttps://openai.com/index/gpt-6-astra/
- Introducing GPT-6 Sol and Luna — OpenAIhttps://openai.com/index/introducing-gpt-6-sol-and-luna/
- Ads in ChatGPT — OpenAIhttps://help.openai.com/en/articles/20001047-ads-in-chatgpt
- GPT-5.6: Frontier intelligence that scales with your ambition — OpenAIhttps://openai.com/index/gpt-5-6/
- ChatGPT pricing — OpenAIhttps://openai.com/chatgpt/pricing/
- GPT-5.6 and GPT-6 Pro in ChatGPT — OpenAIhttps://help.openai.com/en/articles/20001354-gpt-56-in-chatgpt
- What is ChatGPT Go? — OpenAIhttps://help.openai.com/en/articles/11989085-what-is-chatgpt-go
- Introducing ChatGPT — OpenAIhttps://openai.com/index/chatgpt/