Also known as: Open Philanthropy, OP
| Date | Event | Type | Description | Source |
|---|---|---|---|---|
| 2011 | GiveWell begins advising Good Ventures | Founding | GiveWell, founded by Holden Karnofsky and Elie Hassenfeld, begins advising Good Ventures (established by Dustin Moskovitz and Cari Tuna) on how to deploy philanthropic capital effectively. | |
| 2014 | Open Philanthropy formalized as project within GiveWell | Milestone | The advising relationship formalizes into "Open Philanthropy" as a distinct project, focused on identifying high-impact giving opportunities across a broader range of cause areas than GiveWell's traditional global health focus. | |
| 2015 | First AI safety grants | Milestone | Began supporting AI safety work in 2015, when the field had ~10 full-time researchers and institutional support was minimal. Early grants helped establish MIRI, CHAI, and the Future of Humanity Institute. | |
| 2017 | Spun off from GiveWell as independent LLC | Pivot | Holden Karnofsky publishes detailed AI concerns; the spinoff enables Open Philanthropy to pursue its own strategic priorities while GiveWell continues focusing on evidence-backed global health interventions. | openphilanthropy.org (opens in new tab) |
| 2019 | AI safety spending exceeds $20M annually | Milestone | — | |
| 2022 | $150M Regranting Challenge launched (not AI-specific) | Launch | — | |
| 2023 | ~$46M AI safety spending; largest funder in the field | Milestone | AI safety becomes Open Philanthropy's largest longtermist cause area. | |
| 2024 | ~$50M AI safety committed; 68% to evaluations/benchmarking | Milestone | — | |
| 2025 | $40M Technical AI Safety RFP | Funding | — | |
| Nov 2025 | Rebrand from Open Philanthropy to Coefficient Giving | Pivot | Multi-donor expansion (over $100M directed from non-Good-Ventures donors in 2024); brand clarity to disambiguate from OpenAI and Open Society Foundations; structural reorganization into 13 distinct funds. | coefficientgiving.org (opens in new tab) |