OpenAI

AI lab

AI research and deployment company behind GPT models.

Key people

Sam Altman

CEO & co-founder

Co-founder and chief executive of OpenAI, which he has led since 2019 through the launch of ChatGPT and the GPT model series. Previously president of the startup accelerator Y Combinator.

@sama

Photo: TechCrunch, CC BY 2.0

Greg Brockman

President & co-founder

Co-founder and president of OpenAI and former CTO of Stripe. Since July 2026 he has taken over the ChatGPT product business, go-to-market, enterprise and compute teams after Fidji Simo stepped down.

@gdb

Photo: ICPCNews, CC BY 2.0

Jakub Pachocki

Chief Scientist

Polish computer scientist who has been OpenAI's chief scientist since May 2024, succeeding Ilya Sutskever. He was a key technical lead on GPT-4 and on the o-series reasoning models.

@merettm

Events (73)

24 Sep 2026

OpenAI agent breaches Australian Medicare portal, PM Albanese reveals

Other

24 Sep 2026

White House asks OpenAI and Anthropic to withhold new models from UK testers

Regulation

23 Sep 2026

OpenAI

Key people

Sam Altman

Greg Brockman

Jakub Pachocki

Events (73)

OpenAI agent breaches Australian Medicare portal, PM Albanese reveals

White House asks OpenAI and Anthropic to withhold new models from UK testers

OpenAI and Anthropic CEOs urge UN Security Council to adopt global AI standards

OpenAI launches GPT-6 Sol and GPT-6 Luna

OpenAI discloses six cases of concerning model behavior

Dario Amodei calls on the industry to 'pace the frontier'

OpenAI launches ChatGPT Images 2.5 with Sketch

OpenAI launches GPT-6 Astra

OpenAI says its models autonomously hacked Hugging Face

OpenAI publicly releases GPT-5.6 Sol, Terra and Luna

OpenAI confidentially files for an IPO

OpenAI models, Codex and Managed Agents come to Amazon Bedrock

Microsoft and OpenAI end exclusivity in rewritten partnership

OpenAI releases GPT-5.5

OpenAI closes record $122B round at an $852B valuation

OpenAI discontinues Sora; Disney deal unwinds

OpenAI acquires Astral, maker of Python tools uv and Ruff

OpenAI launches GPT-5.4 Thinking and Pro

Trump orders agencies to drop Anthropic after it refuses Pentagon terms

OpenAI raises $110B from Amazon, Nvidia and SoftBank

OpenAI releases GPT-5.3-Codex

OpenAI announces ads for ChatGPT's free and Go tiers

OpenAI launches GPT-5.2 after internal 'code red'

Disney invests $1B in OpenAI and licenses characters for Sora

Anthropic donates MCP to the new Agentic AI Foundation

OpenAI releases GPT-5.1 Instant and Thinking

OpenAI signs $38B, seven-year compute deal with AWS

OpenAI completes recapitalization into a public benefit corporation

OpenAI launches ChatGPT Atlas web browser

OpenAI and Broadcom to deploy 10 GW of OpenAI-designed accelerators

OpenAI DevDay 2025: apps in ChatGPT and AgentKit

OpenAI and AMD sign 6-gigawatt GPU deal with equity warrant

OpenAI launches Sora 2 and the Sora social video app

Nvidia plans to invest up to $100B in OpenAI for 10 GW of systems

OpenAI signs a reported $300B, five-year compute deal with Oracle

OpenAI launches GPT-5

OpenAI releases gpt-oss, its first open-weight models since GPT-2

Google DeepMind and OpenAI models reach gold-medal level at the IMO

OpenAI launches ChatGPT agent

Pentagon awards up to $200M each to Anthropic, Google and xAI

OpenAI launches o3-pro and cuts o3 prices by 80%

OpenAI launches Codex cloud coding agent

OpenAI releases o3 and o4-mini reasoning models

OpenAI launches GPT-4o native image generation

OpenAI launches Agents SDK and Responses API

OpenAI releases GPT-4.5 research preview

OpenAI launches deep research feature

OpenAI launches Operator AI agent

OpenAI releases o3-mini

OpenAI announces o3 reasoning model

OpenAI launches Sora to the public

OpenAI begins 12 Days of OpenAI event

OpenAI releases full o1 model

OpenAI launches ChatGPT Pro at $200/month

OpenAI launches ChatGPT Search

OpenAI introduces Canvas for writing and code

OpenAI raises $6.6B at $157B valuation

OpenAI launches Realtime API and voice mode

OpenAI announces for-profit restructuring

OpenAI releases o1 reasoning model

OpenAI introduces Structured Outputs in API

OpenAI releases GPT-4o mini

Apple announces Apple Intelligence at WWDC 2024

OpenAI launches GPT-4o

OpenAI unveils Sora text-to-video

OpenAI opens GPT Store

OpenAI releases Whisper v3 and GPT-4 Turbo

OpenAI unveils DALL-E 3

OpenAI publishes Red Teaming Network

OpenAI launches Superalignment team

OpenAI releases GPT-4

Microsoft extends multi-year OpenAI partnership

OpenAI launches ChatGPT