OpenAI

Overview

Frontier AI lab behind GPT and ChatGPT. Multi-modal foundation models for reasoning, code, and content generation. Founded 2015 by Sam Altman, Elon Musk, Greg Brockman, Ilya Sutskever and others.

Part of the San Francisco ecosystem

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Timeline

1. Feb 2026Funding Roundtheinformation.com ↗

   Employee tender at $500B+; SoftBank + Tiger Global anchor.

2. Oct 2025Funding Roundopenai.com ↗

   Series E at $157B post-money; Thrive Capital lead.