Joe Spisak

Career

Joe Spisak worked on PyTorch and Llama at Meta, where Spisak is listed among the core contributors of The Llama 3 Herd of Models (2024). In a January 2026 PyTorch Foundation year-in-review post, Spisak contributed a perspective on PyTorch's role in an open, production-grade AI ecosystem, listed as a Product Director at Meta.³⁶⁷

By May 2026 PyTorch's event pages described Spisak as Vice President of Product and Head of Open Source at Reflection AI, a role repeated on the September 2026 PyTorch 2.14 release Q&A page. Spisak also serves on the PyTorch Foundation Governing Board.¹⁵

Open-source work

PyTorch's governance documentation lists Spisak among the project's core maintainers. Spisak took part in the live Q&A panels for the PyTorch 2.12 release in May 2026 and the PyTorch 2.14 release in September 2026.²¹⁵

At PyTorch Conference Europe 2026, Spisak gave the keynote "Community Led Open Source RL", on how the reinforcement learning community collaborates in the open.⁴

Work and contributions

• PyTorch Open-source code

  Listed as one of PyTorch's core maintainers on the project's maintainers page. The repository is under a BSD-style license.²⁸

• Llama 3 Open weights

  Listed among the core contributors in "The Llama 3 Herd of Models" (2024), defined there as people who worked on Llama 3 for at least two-thirds of the project's runtime; the paper's abstract states that Meta publicly released Llama 3, including the 405B-parameter model.³⁶

Timeline

1. Jul 2024Listed among the core contributors of The Llama 3 Herd of Models.³⁶
2. 2026Gave the keynote "Community Led Open Source RL" at PyTorch Conference Europe 2026.⁴
3. Jan 15, 2026Contributed to the PyTorch Foundation's 2025 year-in-review as a Product Director at Meta.⁷
4. May 20, 2026Joined the PyTorch 2.12 release Q&A panel as a Reflection AI executive.¹
5. Sep 17, 2026Joined the PyTorch 2.14 release Q&A panel.⁵

Other documented roles

Roles the sources document that are not confirmed as current.

• Previously worked at Meta; listed as a Llama 3 core contributor, Meta¹³

Where they work

• Reflection AI 1 person in the wiki
• PyTorch Foundation 4 people in the wiki
• PyTorch 11 people in the wiki

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