SAN FRANCISCO, July 14 — The founding document for OpenAI, signed in December 2015, listed six names: Sam Altman, Elon Musk, Greg Brockman, Ilya Sutskever, John Schulman, and Wojciech Zaremba. The organization began as a non-profit, a structure that would not survive the decade. By 2019, OpenAI had shifted to a “capped-profit” model.
That same year, it raised $1 billion from Microsoft. The record shows this investment was the first major tranche of capital that would eventually help propel the company to an $80 billion valuation by 2024.
The ChatGPT Inflection Point
The public launch of ChatGPT in November 2022 changed the timeline of the industry. According to company figures, the product reached 100 million users by January 2023. The success of ChatGPT did not occur in a vacuum.
Google had acquired DeepMind in 2014 for $500 million, laying early groundwork for the AI arms race. In 2021, former OpenAI employees Dario Amodei and Daniela Amodei founded Anthropic.
By 2024, that company had raised $7.3 billion. Meta released its LLaMA model in February 2023.
Market Concentration
The combined market capitalization of major AI companies exceeded $3 trillion by early 2025, according to Bloomberg data. That figure captures the rapid wealth concentration that began with OpenAI’s founding a decade earlier. The founding team of OpenAI produced both the technology and the key competitors who later left to start rival firms.
Anthropic’s leadership, drawn directly from OpenAI’s early ranks, represents the most direct example of this talent migration. The timeline shows a compressed period of growth.
From the December 2015 founding to the $1 billion Microsoft investment in 2019, OpenAI operated with relatively limited resources. The capped-profit restructuring in 2019 was the mechanism that allowed that capital inflow. Four years later, the company was valued at $80 billion.
What to Watch
The industry now faces questions about sustainability and regulation. The $3 trillion combined valuation of major AI companies, as reported by Bloomberg, suggests investors expect continued growth. But the concentration of market power among a small number of firms — OpenAI, Google’s DeepMind, Anthropic, and Meta — raises the same antitrust concerns that have dogged other technology sectors.
The record shows that the talent pipeline remains tight. The same names that appeared on the 2015 founding document continue to shape the industry, either at OpenAI or at the companies their former colleagues have started.
Whether that concentration of expertise will accelerate innovation or create bottlenecks remains an open question as of this writing.
