OpenAI
The AI research organization behind GPT and ChatGPT, founded in 2015, that brought large language models into mainstream use.
Think of it like
The company that showed the world what LLMs could do at scale.
Example
OpenAI released GPT-2 (2019), GPT-3 (2020), and GPT-4 (2023), plus ChatGPT (the first LLM to reach 100 million users).
How it actually works
OpenAI started as a non-profit, shifted to a capped-profit model to raise capital, and now operates a powerful API and chatbot interface. Known for frontier model releases, responsible scaling policies, and high-profile leadership. Early pioneer in RLHF and alignment.
For product teams
Defined the LLM product market; their pricing and product decisions (API vs. chat, fine-tuning costs) drive industry expectations.
For engineers
GPT-4 set the bar for reasoning and multimodal capability. Their API is the most widely used LLM interface.
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