ChatGPT was created by OpenAI, an artificial intelligence research company founded on December 11, 2015 by Sam Altman, Greg Brockman, Ilya Sutskever, Elon Musk, Wojciech Zaremba, John Schulman and a small group of researchers. ChatGPT itself was built by OpenAI’s research team and launched publicly on November 30, 2022. It reached 1 million users in 5 days a 100 million monthly users in 2 months, the fastest consumer product adoption in history at that point.
The short answer is “OpenAI built it,” but the longer answer is more interesting. ChatGPT did not appear out of nowhere. It sat on top of a decade of work, a controversial Elon Musk exit, a Microsoft partnership worth tens of billions of dollars, a board firing of CEO Sam Altman, and a 2025 corporate restructure that completely changed who owns OpenAI today. This guide walks you through every part of that story, with the founders, the timeline, the ownership picture as of May 2026, and the answers to every common question searchers ask.
The Key Takeaways
- OpenAI created ChatGPT. The company was founded on December 11, 2015 in San Francisco.
- Sam Altman, Greg Brockman, Ilya Sutskever, and Elon Musk are the four most prominent co-founders. Around 11 people are listed on the original founding team.
- ChatGPT launched on November 30, 2022 and hit 100 million monthly users in 2 months.
- Microsoft owns roughly 27% of OpenAI as of 2026, worth approximately $135 billion, but does not control the company.
- Elon Musk co-founded OpenAI but left the board in February 2018 and now competes with it through his own AI lab, xAI.
Who Created ChatGPT? Meet the Founders of OpenAI
ChatGPT was built by OpenAI, but OpenAI itself was built by a small group of people who met at a private dinner in 2015. They wanted to keep artificial intelligence in a non-profit research lab instead of letting big tech control it. The result was OpenAI, formally announced as a non-profit on December 11, 2015 with $1 billion in pledged funding from a mix of individuals and tech companies, including Amazon Web Services, Infosys and YC Research.
The original founding team was eleven people, but four names dominate the public history: Sam Altman, Greg Brockman, Ilya Sutskever, and Elon Musk. Each played a distinct role in turning the lab into the company that eventually shipped ChatGPT.
| Founder | Role at founding | Background | Status in 2026 |
|---|---|---|---|
| Sam Altman | Co-chair, then CEO from 2019 | Former president of startup accelerator Y Combinator | CEO of OpenAI |
| Greg Brockman | Co-founder, CTO, then President | First CTO of payments company Stripe | President of OpenAI |
| Ilya Sutskever | Co-founder and Chief Scientist | PhD under Geoffrey Hinton; ex-Google Brain | Left OpenAI May 2024; now runs Safe Superintelligence Inc |
| Elon Musk | Co-founder and co-chair | CEO of Tesla and SpaceX | Left board Feb 2018; runs xAI; sued OpenAI in 2024 |
| Wojciech Zaremba | Co-founding researcher | PhD from NYU; ex-Google Brain and Facebook AI | Still at OpenAI as research lead |
| John Schulman | Co-founding researcher | PhD from UC Berkeley | Left OpenAI for Anthropic in August 2024; now chief scientist at Thinking Machines Lab |
| Andrej Karpathy | Founding research scientist | PhD from Stanford, former Tesla AI director | Returned to AI education and Eureka Labs |
A few names are less famous but worth knowing: Trevor Blackwell, Vicki Cheung, Pamela Vagata and Durk Kingma all signed on as part of the founding team. Reid Hoffman, Peter Thiel, Jessica Livingston and Y Combinator Research were among the original financial backers.
Sam Altman, the CEO who took ChatGPT to the world
If you ask “who is the founder of ChatGPT,” most people answer Sam Altman, and that is roughly accurate. Sam Altman, the CEO of OpenAI, has been the public face of the company since he took over as CEO in 2019. He had already spent five years running Y Combinator, the startup accelerator behind Airbnb, Stripe, and Reddit, before he turned full-time to OpenAI.
Altman is not the person who wrote the GPT model architecture, but he is the one who pushed OpenAI to release ChatGPT to the public in 2022, signed the multi-billion-dollar Microsoft deal, and steered the company through its restructure into a public benefit corporation in 2025. He was famously fired by the board on November 17, 2023 and reinstated five days later, after employee and investor pressure forced the board’s hand.
Greg Brockman, Ilya Sutskever and the technical core
Greg Brockman is the co-founder most people forget but who arguably built the engineering culture at OpenAI. He came in as CTO after serving as the first CTO of Stripe, and is now President of OpenAI. Ilya Sutskever was the chief scientist behind much of the deep learning research that led to GPT-3 and GPT-4. He left in May 2024 after the fallout from the Altman firing and now runs his own lab, Safe Superintelligence Inc.
Wojciech Zaremba and John Schulman were quieter but equally important on the research side. Schulman led the team responsible for reinforcement learning from human feedback (RLHF), the technique that made ChatGPT feel conversational rather than robotic.
Why Was ChatGPT Created?
OpenAI’s original mission was simple and ambitious. The founders wanted to build artificial general intelligence (AGI) that benefits all of humanity, and they wanted it built in the open instead of behind the walls of a single company. The non-profit structure was a deliberate hedge against a future where AI was controlled by Google, Microsoft, or any single corporation.
ChatGPT itself was not the original product plan. It was launched as a “research preview” of GPT-3.5 in November 2022, designed to gather public feedback on a chatbot that used reinforcement learning from human feedback. OpenAI staff reportedly expected modest traction; the explosive growth that followed redrew the company’s roadmap and pulled it into a commercial direction nobody had fully planned for.
The mission shift since then has been real. The non-profit charter is still in place, but OpenAI now ships paid products, takes Microsoft money, and operates a for-profit subsidiary. Sam Altman has repeatedly defended this as the only way to fund the compute costs of building AGI safely.
Timeline: From OpenAI’s 2015 Founding to ChatGPT in 2026
| Date | Event |
|---|---|
| December 11, 2015 | OpenAI founded as a non-profit with $1B pledged. Sam Altman and Elon Musk co-chair. |
| February 2018 | Elon Musk steps down from the OpenAI board citing a Tesla AI conflict of interest. |
| June 2018 | OpenAI publishes GPT-1, the first generative pre-trained transformer. |
| February 2019 | GPT-2 released, initially in restricted form over safety concerns. |
| March 2019 | OpenAI creates a “capped-profit” arm called OpenAI LP to attract investment. |
| July 2019 | Microsoft invests $1 billion and becomes OpenAI’s exclusive cloud provider. |
| June 2020 | GPT-3 launched via API; first commercial OpenAI product at scale. |
| November 30, 2022 | ChatGPT launches as a free research preview. |
| January 2023 | ChatGPT crosses 100 million monthly active users. |
| March 2023 | GPT-4 released; multimodal text and image input. |
| November 17, 2023 | OpenAI board fires Sam Altman; he is reinstated 5 days later. |
| February 2024 | Elon Musk sues OpenAI alleging breach of the original non-profit mission. |
| October 28, 2025 | OpenAI completes restructure into a public benefit corporation (OpenAI Group PBC) under the OpenAI Foundation. |
| April 23, 2026 | OpenAI ships GPT-5.5, its most capable model. |
| April 27, 2026 | Microsoft-OpenAI partnership renegotiated; revenue cap, non-exclusive IP licence through 2032. |
Did Elon Musk Create ChatGPT?
Elon Musk co-founded OpenAI in December 2015 alongside Sam Altman and was a founding co-chair. He committed an initial $100 million in funding and was deeply involved in the early strategy, including hiring debates and the public framing of the lab’s mission. He did not write any of the code behind ChatGPT, and he was not at OpenAI when ChatGPT was built.
Musk left the board in February 2018, citing a potential conflict of interest with Tesla’s growing in-house AI work on autonomous driving. The split was not entirely amicable. He later said he had wanted to take over OpenAI directly and merge it with Tesla, a proposal the rest of the founders rejected. Musk also reportedly cut off promised future funding when his takeover bid failed.
He filed his first lawsuit against OpenAI, Sam Altman and Greg Brockman in February 2024, accusing them of betraying the original non-profit charter. The suit was dropped, refiled in federal court in August 2024, and has been amended multiple times since. Musk now runs his own AI company, xAI, which builds the Grok chatbot, a direct ChatGPT competitor.
Who Owns ChatGPT and OpenAI in 2026?
OpenAI owns ChatGPT. The product itself, the GPT models, the trademarks and the user data all sit with OpenAI. The interesting question is who owns OpenAI, because that picture has changed dramatically in the last 12 months.
In October 2025, OpenAI completed a long-debated corporate restructure. The company is now organised as a public benefit corporation (PBC) called OpenAI Group, controlled by a non-profit parent, the OpenAI Foundation. The Foundation appoints the directors of the PBC and keeps governance control even though it doesn’t own a majority of the equity. This was the structure OpenAI eventually settled on after first abandoning a full for-profit conversion plan in May 2025.
OpenAI’s total valuation sits at roughly $500 billion based on the October 2025 secondary share sale, which makes the percentages below easy to translate into dollar values.
| Stakeholder | Approximate ownership | Notes |
|---|---|---|
| Microsoft | ~27% | Largest minority shareholder. Stake worth approximately $135 billion as of the 2026 valuation. |
| OpenAI Foundation | ~26% | Holds governance control regardless of equity share. |
| Employees and ex-employees | ~25% | Includes vested equity from years of stock-based compensation. |
| 2025 funding-round investors | ~13% | Includes SoftBank, Thrive Capital, MGX and others from the late-2025 round. |
| 2024 round, IO shareholders and earliest backers | ~9% | Includes Khosla Ventures, Tiger Global, Reid Hoffman and shareholders from the 2025 acquisition of Jony Ive’s IO startup. |
Does Microsoft own ChatGPT?
No. Microsoft is the single largest equity holder in OpenAI but it does not control the company, and it does not own ChatGPT. The April 27, 2026 partnership reset capped Microsoft’s revenue-share payments from OpenAI, ended Microsoft’s exclusivity as OpenAI’s cloud provider, and made Microsoft’s licence to OpenAI’s intellectual property non-exclusive through 2032. Microsoft can ship products like Copilot using GPT models, but OpenAI can now serve customers on AWS, Google Cloud, and other providers as well.
For the deeper context behind this deal, the official next chapter announcement from OpenAI lays out the new framework in plain terms.
Who Runs OpenAI Today?
Sam Altman is still CEO, despite the November 2023 board drama that briefly removed him. Greg Brockman is President. Mira Murati, who served as CTO during the launch of ChatGPT and briefly as interim CEO during the firing, left in 2024 to start her own AI lab. The OpenAI board has been substantially restructured since 2023 and now includes Bret Taylor as chair, with directors appointed by the OpenAI Foundation.
Day-to-day product leadership rotates across senior figures who have stayed through the transitions, while research is led by a smaller core team after the departures of Ilya Sutskever and several alignment researchers in 2024.
Looking for ChatGPT and More? Try Fello AI
If you came to this page asking “who created ChatGPT,” there is a good chance you are also a regular ChatGPT user. The follow-up question worth asking is whether ChatGPT alone is the right tool, or whether you would be better off using ChatGPT alongside Claude, Gemini, Grok, and DeepSeek in one place.
That is exactly what Fello AI does. It is a single Mac, iPhone and iPad app that gives you ChatGPT and the other leading AI models behind one subscription, with one history, one search, and one set of files. It covers writing, coding, research, image work and document analysis without forcing you to manage four separate accounts. At $9.99/month it is roughly half the price of paying for ChatGPT Plus on its own.
The full picture of what is shipping right now is on the best AI models of 2026 ranking, and if you mainly use ChatGPT on a Mac, the ChatGPT desktop app for Mac comparison is worth a read.
Závěr
ChatGPT was created by OpenAI, a research company that began in 2015 as a non-profit and is now a public benefit corporation valued at hundreds of billions of dollars. Sam Altman, Greg Brockman, Ilya Sutskever and Elon Musk are the four most recognisable co-founders, but the actual product was the work of a much larger research and engineering team across nearly a decade.
The next time someone asks you who made ChatGPT, you can answer with the short version (OpenAI), the names (Altman, Brockman, Sutskever, Musk and others) and the date (November 30, 2022), and have the full backstory in your head. If you want to keep using ChatGPT alongside other top AI models in one app, try Fello AI on your Mac as the simplest way to get there.
FAQ
Who is the founder of ChatGPT?
ChatGPT was built by OpenAI, which was co-founded by Sam Altman, Greg Brockman, Ilya Sutskever, Elon Musk, Wojciech Zaremba and John Schulman among others. Sam Altman, the current CEO, is the public figure most often called “the founder of ChatGPT.”
When was ChatGPT created?
ChatGPT launched as a free research preview on November 30, 2022. The underlying GPT model line started with GPT-1 in 2018, GPT-2 in 2019, GPT-3 in 2020 and GPT-3.5 in 2022.
Did Elon Musk create ChatGPT?
Elon Musk co-founded OpenAI in 2015 and helped fund the early years, but he left the board in February 2018, four years before ChatGPT launched. He did not build the product and now runs a competing AI lab called xAI.
Does Microsoft own ChatGPT?
No. Microsoft is the largest minority investor in OpenAI with roughly 27% equity, but it does not own ChatGPT or control OpenAI. The 2026 partnership reset ended Microsoft’s exclusivity and made its IP licence non-exclusive through 2032.
Why was Sam Altman fired in 2023?
The OpenAI board fired Altman on November 17, 2023 citing a lack of “consistent candour” in his communications. He was reinstated five days later after near-unanimous employee pushback and pressure from investors including Microsoft. The original board members who voted to remove him have since left.
