OpenAI

Overview

OpenAI is an American artificial intelligence research organization headquartered in San Francisco [2]. Founded in 2015 in Delaware as a nonprofit [3], it operates as OpenAI Group PBC, a for-profit public benefit corporation partially controlled by the nonprofit OpenAI Foundation [2]. The organization develops generative AI models, particularly the GPT series of large language models [2]. OpenAI released ChatGPT in November 2022, which reached over 100 million users within two months, followed by GPT-4 in March 2023 [6]. As of 2026, OpenAI has 4,500 employees [7]. The company raised $6.6 billion in October 2024 at a $157 billion valuation from investors including Microsoft, Nvidia and SoftBank [4], and subsequently raised $40 billion in April 2025 at a $300 billion post-money valuation led by SoftBank with participation from Microsoft, Coatue, Altimeter and Thrive Capital [5]. OpenAI lists 17 open roles based in New York on its careers board, of 729 worldwide [1].

Lists 17 open roles based in New York on its careers board, of 729 worldwide. [1]

OpenAI was founded in 2015 in Delaware as a nonprofit. [3]

OpenAI released GPT-4 in March 2023, following ChatGPT, which was released in November 2022 and reached over 100 million users within two months. [6]

Business address: 3180 18th Street, San Francisco, California, 94110. [9]

Funding history

OpenAI raised $6.6 billion in October 2024 at a $157 billion valuation, from investors including Microsoft, Nvidia and SoftBank. [4]

OpenAI raised $40 billion in April 2025 at a $300 billion post-money valuation, led by SoftBank with participation from Microsoft, Coatue, Altimeter and Thrive Capital. [5]

Growth & traction

OpenAI's Wikipedia infobox lists 4,500 employees (2026). [7]