{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2022-11-30-chatgpt/","md":"https://postcutoff.com/e/2022-11-30-chatgpt/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"2022-11-30-chatgpt","date":"2022-11-30","date_precision":"day","short_title":"OpenAI launches ChatGPT","deck":null,"takeaway":"OpenAI released ChatGPT, a conversational interface to a GPT-3.5 model fine-tuned with RLHF, as a free research preview; it became the fastest-growing consumer app to that point and triggered the generative AI boom.","category":"product","category_label":"Products","importance":5,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":[{"n":1,"title":"Introducing ChatGPT (OpenAI)","url":"https://openai.com/index/chatgpt/","type":"official","group":"primary","domain":"openai.com"},{"n":2,"title":"Wikipedia: ChatGPT","url":"https://en.wikipedia.org/wiki/ChatGPT","type":"discussion","group":"reactions","domain":"en.wikipedia.org"}],"official":1,"filed":"2026-09-29","updated":"2026-09-29","orgs":["OpenAI"],"title":"OpenAI launches ChatGPT","summary":"OpenAI released ChatGPT, a conversational interface to a GPT-3.5 model fine-tuned with RLHF, as a free research preview; it became the fastest-growing consumer app to that point and triggered the generative AI boom.","key_facts":["Launched 30 November 2022 as a free research preview","Based on a model in the GPT-3.5 series, trained with RLHF","Passed 1 million users within about five days","Estimated at ~100M monthly users by January 2023 (UBS/Similarweb estimate)","ChatGPT Plus ($20/month) launched February 2023"],"key_numbers":[],"tags":["chatbot","llm","rlhf","consumer"],"science":null,"body_md":"## What happened\n\nChatGPT let anyone chat with a capable LLM for free; its viral success forced Google, Meta, Microsoft and others into an AI race.\n\n## Why it matters\n\nThe moment AI became a mass-market technology — the start of the current era of AI investment, adoption and policy attention.","disputed":[],"related":[{"id":"2023-03-14-gpt-4","url":"https://postcutoff.com/e/2023-03-14-gpt-4/","date":"2023-03-14","date_precision":"day","short_title":"OpenAI releases GPT-4","deck":null,"takeaway":"Defined the frontier for over a year and triggered serious policy attention to AI risk (pause letter, hearings, summits).","category":"model-release","category_label":"Model releases","importance":5,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":2,"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["OpenAI"]},{"id":"2022-01-27-instructgpt","url":"https://postcutoff.com/e/2022-01-27-instructgpt/","date":"2022-01-27","date_precision":"day","short_title":"InstructGPT: RLHF aligns language models to follow instructions","deck":null,"takeaway":"RLHF turned raw LLMs into usable assistants and underlies ChatGPT, Claude and nearly all chat models.","category":"research","category_label":"Research","importance":5,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":3,"official":3,"filed":"2026-09-29","updated":"2026-09-29","orgs":["OpenAI"]}],"people":[],"posts":[],"videos":[],"models":[],"changes":[{"date":"2026-09-29","type":"filed","text":"Created"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-09-29","run":null,"sources_read":null,"updated":"2026-09-29","human_review":null,"version":{"date":"2026-10-04"}},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":null,"in_training_data":true},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":null,"in_training_data":true},{"model_id":"gemini-4-hydrogen","name":"Gemini 4 Hydrogen","cutoff":"2026-03","days_after":null,"in_training_data":true},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":null,"in_training_data":true}],"short_url":"https://postcutoff.com/s/openai-chatgpt"}