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10 ChatGPT pages in History.
- CanvasCanvas was a ChatGPT workspace for editing writing and code beside the chat, launched in beta on Oct 3, 2024. It was removed from current models on May 28, 2026; writing blocks and interactive code blocks in the chat replaced it.
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ChatGPT PulseChatGPT Pulse gave Pro users a daily set of personalized updates that ChatGPT researched overnight, from Sep 25, 2025. OpenAI announced its sunset on Jun 17, 2026, gave Pro users 14 more days, and moved proactive updates into scheduled tasks.
- DALL-EDALL-E was OpenAI's text-to-image model line: DALL-E (Jan 2021), DALL-E 2 (2022) and DALL-E 3 (2023, built into ChatGPT). GPT-4o image generation replaced it in ChatGPT in March 2025, the API models shut down on May 12, 2026, and the DALL-E GPT retired on Aug 30, 2026.
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GPT Model HistoryOpenAI's GPT models run from GPT-1 (Jun 11, 2018) through GPT-2 (1.5 billion parameters, 2019), GPT-3 (175 billion, 2020), GPT-4 (2023), GPT-4o (2024), GPT-5 (Aug 7, 2025) and the GPT-5.x updates to GPT-6 Astra (Sep 3, 2026) and its siblings.
- Group ChatsChatGPT group chats let several people and ChatGPT share one conversation. OpenAI piloted them on Nov 13, 2025, opened them to all logged-in Free, Go, Plus and Pro users on Nov 20, 2025, and stopped new group chats from Jul 9, 2026.
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History of ChatGPTChatGPT came out on Nov 30, 2022, as a free research preview from OpenAI built on a GPT-3.5 model. By Oct 2026 it had more than 1.2 billion weekly users, paid plans from $8 to $500 a month and the GPT-6 models.
- History of OpenAIOpenAI was founded as a nonprofit AI research company on Dec 11, 2015, added a capped-profit arm in 2019, partnered with Microsoft, released ChatGPT in 2022 and became OpenAI Group PBC under the OpenAI Foundation on Oct 28, 2025.
- OpenAIOpenAI is the AI company behind ChatGPT, Codex and the GPT models. Since Oct 28, 2025 it has been OpenAI Group PBC, controlled by the nonprofit OpenAI Foundation, with Microsoft holding about 27%; CEO Sam Altman leads it, and it was last valued at $852 billion.
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OperatorOperator was OpenAI's browser agent, a research preview for Pro users in the US launched on Jan 23, 2025 at operator.chatgpt.com. On Jul 17, 2025 it was folded into ChatGPT as agent mode, and the Operator website is no longer accessible.