Topic · Company
OpenAI
OpenAI is the San Francisco company that makes ChatGPT, the GPT model family and the Codex coding agent. It began in 2015 as a nonprofit research lab and, after an October 2025 recapitalization, is now a public benefit corporation controlled by a nonprofit foundation, a structure that shapes debates about its mission and its investors.
Fact file
Headquarters / registered office1455 Third Street, San Francisco, CA 94158 (OpenAI OpCo, LLC)
Ownership (per OpenAI, at the Oct 2025 recapitalization)Foundation ~26%; Microsoft ~27%; employees and investors ~47%. Not updated by OpenAI for later rounds (e.g. Mar 31, 2026)
ChatGPT launchNovember 30, 2022
Codex (agent) launchCodex CLI April 16, 2025; Codex cloud agent May 16, 2025
Current ChatGPT models (Oct 7, 2026)GPT-6 Sol (Plus, Pro, Business, Enterprise); GPT-6 Luna (Free, Go)
Stargate announcedJanuary 21, 2025; $500B planned over four years (company plan)
Latest on OpenAI
Oct 9Models · BenchmarksLong-context recall: what independent benchmarks say "1 million tokens" really buys youOct 9Apps · ExplainerChatGPT agent mode, explained: what it was, why it's gone, and what ChatGPT Work does insteadOct 9Agents · ExplainerOpenAI Codex explained: where it runs, which models and limits you get, and how its sandbox worksOct 9Developer tools · ExplainerModel routing explained: how to mix cheap, mid and frontier modelsOct 9Models · ExplainerReasoning models explained: thinking tokens, what they cost, and when to use themOct 9Business · ExplainerOpenAI explained: who controls it, what it sells, and how it makes moneyOct 9Research · ExplainerHow to read a system card: a builder's guide to AI safety documentationOct 9Research · ExplainerContext windows vs memory vs RAG: what each one actually doesOct 9Agents · ExplainerWhat "agentic" really means in 2026
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Timeline
JAN 2025Stargate announced
NOV 2022ChatGPT launch