OpenAI

Founded December 2015 as a non-profit by Sam Altman, Elon Musk, Ilya Sutskever, Greg Brockman, Wojciech Zaremba, and John Schulman. Restructured to a capped-profit entity in 2019 to access compute capital, raised major investment from Microsoft, and shipped ChatGPT in November 2022 - the fastest-growing consumer product in history.

Over $13B committed by Microsoft; additional rounds at $80B+ valuations.

• GPT-2

  First large generative LM released in stages over safety concerns (2019).

• GPT-3

  175B parameters; launched the prompting paradigm (2020).

• GPT-4 / 4o

  Multimodal frontier; powers enterprise and ChatGPT.

• o-series

  Reasoning models trained with reinforcement learning on chain-of-thought.

• Sora

  Text-to-video diffusion transformer.

• Whisper

  Open multilingual speech recognition.

• Frontier model research
• Superalignment (disbanded 2024)
• Preparedness
• Red-teaming network

• System cards published with every frontier release
• Preparedness Framework for catastrophic-risk evaluation
• Voluntary White House AI safety commitments (2023)

• Attention Is All You Need (collaborator on transformer ecosystem)

  NeurIPS · 2017

• Language Models are Few-Shot Learners (GPT-3)

  NeurIPS · 2020

• GPT-4 Technical Report

  arXiv · 2023

• Reinforcement Learning from Human Feedback at scale 2022

  RLHF made ChatGPT viable as a consumer product.

• GPT-4 multimodal frontier capability 2023

  First widely available system to clear professional licensing exams.

• o1 inference-time reasoning 2024

  Demonstrated that test-time compute scales reasoning performance.

• Microsoft Azure (exclusive cloud)
• Apple (Apple Intelligence)
• Reddit (data)
• Bain & Company

1. 2015

   Founded as non-profit.

2. 2019

   Capped-profit restructuring; Microsoft invests $1B.

3. 2020

   GPT-3 released.

4. 2022

   ChatGPT launched.

5. 2023

   GPT-4 and GPT-4V released; Sam Altman briefly ousted and reinstated.

6. 2024

   o1 and o3 reasoning models; Sora preview.

Competes directly with Anthropic, Google DeepMind, xAI, and Meta on frontier capability. Differentiated by consumer distribution (ChatGPT) and enterprise penetration via Microsoft.