A quote from John Gruber
Simon Willison’s Weblog
Subscribe
Sponsored by: MongoDB — Join MongoDB.local London 2026 on 7 May to learn how teams move AI from prototype to production.
5th May 2026
So it’s well known that Y Combinator owns some stake in OpenAI. But how big is that stake? This seems like devilishly difficult information to obtain. I asked around and a little birdie who knows several OpenAI investors came back with an answer: Y Combinator owns about 0.6 percent of OpenAI. At OpenAI’s current $852 billion valuation, that’s worth over $5 billion.
— John Gruber, Y Combinator’s Stake in OpenAI
Posted 5th May 2026 at 12:46 am
Recent articles
LLM 0.32a0 is a major backwards-compatible refactor - 29th April 2026
Tracking the history of the now-deceased OpenAI Microsoft AGI clause - 27th April 2026
DeepSeek V4 - almost on the frontier, a fraction of the price - 24th April 2026
This is a quotation collected by Simon Willison, posted on 5th May 2026.
john-gruber 40
y-combinator 59
ai 2003
openai 417
Disclosures
Colophon
©
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026