Sam Altman Elon Musk Ilya Sutskever Greg Brockman Trevor Blackwell Vicki Cheung Andrej Karpathy Durk Kingma Jessica Livingston John Schulman Pamela Vagata Wojciech Zaremba
Headquarters
Pioneer Building, San Francisco, California, United States
Key people
Sam Altman (CEO) Greg Brockman (President) Mira Murati (CTO) Sarah Friar (CFO) Brad Lightcap (COO) Jakub Pachocki (Chief Scientist) Bret Taylor (Chairman)
OpenAI is an artificial intelligence (AI) research and deployment company founded on December 11, 2015, in San Francisco, California [1]. The organization consists of two entities: OpenAI Inc., a 501(c)(3) non-profit organization, and OpenAI Global LLC, a for-profit subsidiary controlled by the non-profit parent [2]. Its stated mission is to ensure that artificial general intelligence (AGI), highly autonomous systems that outperform humans at most economically valuable work, benefits all of humanity [3].
The company gained widespread public attention with the release of ChatGPT in November 2022, which reached 100 million users in just two months, becoming the fastest-growing consumer application in history [4]. As of October 2025, ChatGPT serves 700 million weekly active users worldwide, with adoption by 92% of Fortune 500 companies [5].
OpenAI has developed groundbreaking AI models including the GPT series of large language models, DALL-E image generation systems, Sora video generation technology, and Whisper speech recognition. As of October 2025, the company has achieved a valuation of $500 billion following a secondary share sale, making it the world's most valuable private company [6].
History
Founding and Early Years (2015-2019)
OpenAI was founded on December 11, 2015, as a non-profit artificial intelligence research laboratory by Sam Altman, Elon Musk, Ilya Sutskever, Greg Brockman, Trevor Blackwell, Vicki Cheung, Andrej Karpathy, Durk Kingma, Jessica Livingston, John Schulman, Pamela Vagata, and Wojciech Zaremba [1]. The founding members and early backers, including Reid Hoffman, Peter Thiel, Amazon Web Services, Infosys, and YC Research, collectively pledged over $1 billion to the venture, though only about $130 million was collected by 2019 [7].
The organization aimed to develop open-source AI research to mitigate existential risks from AGI and ensure its benefits would be widely distributed rather than concentrated in the hands of a few corporations [1]. Early projects included:
2016: Received a DGX-1 supercomputer from Nvidia, the first unit shipped
2016: Launched OpenAI Universe, a platform for training AI agents across various environments [9]
2018: Released GPT-1, introducing the transformer-based language model approach with 117 million parameters [10]
In February 2018, Elon Musk resigned from the board citing potential conflicts of interest with his work on AI at Tesla, though he remained a donor and advisor [11].
Transition to "Capped-Profit" and Microsoft Partnership (2019-2022)
In March 2019, OpenAI underwent a significant structural transformation, creating OpenAI LP (later renamed OpenAI Global LLC), a "capped-profit" for-profit entity. This model limits investor returns to 100 times their investment, with excess profits flowing back to the non-profit parent [2]. This restructuring was motivated by the immense computational and capital requirements for developing AGI, estimated at billions of dollars.
In July 2019, Microsoft announced a $1 billion investment in OpenAI, marking the beginning of a strategic partnership [12]. The partnership provided:
Exclusive cloud computing through Microsoft Azure
Joint development of Azure AI supercomputing technologies
Microsoft as exclusive commercial partner for OpenAI technologies
Key releases during this period:
February 2019: GPT-2 with 1.5 billion parameters, initially withheld due to concerns about malicious use [13]
June 2020: GPT-3 with 175 billion parameters, demonstrating unprecedented few-shot learning capabilities [14]
September 2020: Microsoft licensed exclusive use of GPT-3 technology [15]
January 2021: DALL-E, first text-to-image generation model
April 2022: DALL-E 2 with improved resolution and capabilities
ChatGPT and Mainstream Success (2022-2023)
On November 30, 2022, OpenAI released ChatGPT, a conversational AI chatbot based on GPT-3.5 using Reinforcement Learning from Human Feedback (RLHF) [16]. The release represented a pivotal moment in AI history:
Reached 1 million users in 5 days
100 million users in 2 months (fastest consumer app growth ever)
Sparked global conversation about AI capabilities and risks
Led to rapid AI development across the industry
In January 2023, Microsoft announced an expanded multi-year, multi-billion dollar investment (reported as $10 billion), deepening the partnership and integrating OpenAI models across Microsoft products including Bing and Microsoft 365 [17].
March 14, 2023, saw the release of GPT-4, a multimodal model capable of processing both text and images, showing human-level performance on various professional and academic benchmarks [18].
Board Crisis and Leadership Turmoil (November 2023)
On November 17, 2023, OpenAI experienced an unprecedented governance crisis when the board of directors abruptly removed Sam Altman as CEO, citing that he "was not consistently candid in his communications with the board, hindering its ability to exercise its responsibilities" [19]. The board action was reportedly led by chief scientist Ilya Sutskever and board members Helen Toner, Tasha McCauley, and Adam D'Angelo [20].
The decision triggered immediate backlash:
President Greg Brockman resigned in protest
Over 700 of OpenAI's ~770 employees (>95%) signed an open letter threatening to resign and join Microsoft unless Altman was reinstated [21]
Microsoft CEO Satya Nadella announced Altman and Brockman would lead a new AI research unit at Microsoft
Major investors including Microsoft, Thrive Capital, and Sequoia Capital pressured for Altman's return
After five days of intense negotiations, on November 22, 2023, Altman was reinstated as CEO with a new initial board comprising:
Bret Taylor (Chairman, former co-CEO of Salesforce)
Larry Summers (former U.S. Treasury Secretary)
Adam D'Angelo (CEO of Quora, only remaining member from previous board) [22]
The crisis reportedly stemmed from fundamental disagreements about AI safety, commercialization pace, and the balance between the non-profit mission and for-profit operations [23].
Recent Developments (2024-2025)
2024: Expansion and Departures
May 2024:
Released GPT-4o ("o" for "omni"), a natively multimodal model processing text, images, and audio [24]
Co-founder and Chief Scientist Ilya Sutskever departed; Jakub Pachocki appointed as new Chief Scientist
Superalignment co-lead Jan Leike resigned, citing safety concerns: "safety culture and processes have taken a backseat to shiny products" [25]
July 2024: Launched GPT-4o mini, a smaller, more efficient model [26]
September 2024:
Introduced o1 reasoning models for complex problem-solving [27]
CTO Mira Murati announced departure after 6.5 years
October 2024: Raised $6.6 billion at $157 billion valuation
December 2024:
Released Sora, text-to-video generation model [28]
Launched o1 and o1-pro reasoning models
2025: Unprecedented Growth
January 2025: Announced the Stargate Project, a $500 billion AI infrastructure initiative with SoftBank, Oracle, and MGX [29]
March 2025: Raised $40 billion at $300 billion valuation [30]
May 2025:
Launched Codex, a cloud-based software engineering agent [31]
Acquired Jony Ive's hardware startup "io" for $6.4 billion
Acquired product development platform "Statesig" for $1.1 billion
September 2025:
Released Sora 2 with synchronized audio generation and social media app [32]
Five new Stargate datacenter sites announced
Strategic partnership with Nvidia for 10 gigawatts of systems
October 2025: Valuation reached $500 billion following secondary share sale to SoftBank, Dragoneer, and Thrive [6]
Corporate Structure and Governance
Organizational Structure
OpenAI operates under a unique hybrid structure designed to balance its research mission with commercial needs [2]:
Entity
Type
Role
Established
OpenAI Inc.
501(c)(3) Non-profit
Overall governance body; Controls the organization's mission
The non-profit board maintains ultimate control over the organization's direction and ensures adherence to its mission of ensuring AGI benefits all of humanity. The capped-profit structure limits investor returns to 100x their investment (for early investors), with excess value flowing to the non-profit [33].
Board of Directors (as of October 2025)
Name
Role
Background
Joined
Bret Taylor
Chairman
Former co-CEO of Salesforce, former CTO of Facebook
November 2023
Sam Altman
CEO, Director
Co-founder, former president of Y Combinator
March 2024 (rejoined board)
Adam D'Angelo
Director
CEO of Quora
October 2023
Larry Summers
Director
Former U.S. Treasury Secretary, former Harvard president
November 2023
Dr. Sue Desmond-Hellmann
Director
Former CEO of Bill & Melinda Gates Foundation
March 2024
Nicole Seligman
Director
Former EVP and General Counsel of Sony Corporation
March 2024
Fidji Simo
Director
CEO of Instacart
March 2024
Paul Nakasone
Director
Former NSA Director, retired U.S. Army General
June 2024
Zico Kolter
Director
Carnegie Mellon professor, AI safety researcher
November 2024
Microsoft
Observer (non-voting)
Strategic partner and major investor
2023
Leadership Team
Position
Name
Tenure
Previous Role
Chief Executive Officer
Sam Altman
2019-2023, 2023-present
President of Y Combinator
President
Greg Brockman
2015-present
Co-founder, former CTO of Stripe
Chief Technology Officer
Mira Murati
2018-2024 (departed)
VP of Applied AI at Tesla
Chief Financial Officer
Sarah Friar
2024-present
CEO of Nextdoor
Chief Operating Officer
Brad Lightcap
2018-present
VP at Y Combinator
Chief Scientist
Jakub Pachocki
2024-present
Research lead at OpenAI
Chief Product Officer
Kevin Weil
2024-present
Former VP at Instagram
Financial Performance
Revenue Growth
OpenAI has experienced exponential revenue growth [34]:
Year
Annual Revenue
Growth Rate
Key Drivers
2020
$3.5 million
-
Early API access
2021
$28 million
700%
GPT-3 API expansion
2022
$300 million
971%
Increased enterprise adoption
2023
$1.6 billion
433%
ChatGPT launch, ChatGPT Plus
2024
$3.7 billion
131%
Enterprise subscriptions, API growth
2025 (H1)
$4.3 billion
-
Exceeded full 2024 revenue in 6 months
2025 (projected)
$12.7 billion
243%
New products, increased pricing
2026 (projected)
$29.4 billion
131%
Market expansion
2029 (projected)
$100 billion
-
AGI commercialization target
Funding History
OpenAI has raised approximately $57.9 billion across multiple funding rounds [34]:
OpenAI operates according to its Charter principles, published in 2018 [3]:
Broadly Distributed Benefits: Commit to use any influence over AGI's deployment to ensure it benefits all of humanity, avoiding uses that harm humanity or concentrate power
Long-Term Safety: Conduct research to make AGI safe and encourage adoption of safety measures across the AI community; assist value-aligned, safety-conscious projects that come close to building AGI before OpenAI
Technical Leadership: Maintain position at the forefront of AI capabilities to effectively address AGI's impact on society, policy and safety advocacy alone insufficient without technical expertise
Cooperative Orientation: Actively cooperate with other research and policy institutions; create a global community working together to address AGI's global challenges
Safety and Alignment Research
OpenAI maintains multiple safety initiatives:
Initiative
Description
Status
Preparedness Framework
Systematic evaluation of model risks across domains
Active, quarterly updates
Red teaming
Adversarial testing with domain experts
Ongoing for all major releases
Constitutional AI
Principles for AI behavior and alignment
Integrated in training
Superalignment team
Long-term AGI alignment research
Dissolved May 2024, integrated into other teams
Safety evaluations
Assessment across cybersecurity, CBRN, persuasion, autonomy
Required pre-deployment
Content filtering
Multi-layered harmful content prevention
Continuously updated
Usage Policies
OpenAI's Usage Policies (updated October 17, 2025) establish guidelines for responsible AI use [38]:
Key Policy Principles:
User Empowerment: Enable innovation while maintaining safety
Responsible Use: Users accountable for appropriate usage
Safety First: Prioritize safety in monitoring and enforcement
Evolving Rules: Adapt policies to emerging use cases
Major Prohibitions:
Threats to persons or property (harassment, violence, weapons)
Privacy violations (unauthorized data collection, surveillance)
