# John Schulman (slim)

> John Schulman is co-founder and Chief Scientist; Tinker research/hiring involvement. Tinker on Anchor Terminal, with grades, an about and public profiles.

- Full: https://www.anchorterminal.com/people/john-schulman-2/index.md (~1,050 tokens) · this version ~880 tokens · JSON https://www.anchorterminal.com/people/john-schulman-2/index.json · canonical https://www.anchorterminal.com/people/john-schulman-2/
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-28
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Co-founder and Chief Scientist; Tinker research/hiring involvement.

John Schulman is chief scientist at Thinking Machines Lab, which he joined in February 2025. He co-founded OpenAI in 2015 and led the reinforcement learning team that created ChatGPT, drawing on his work on Trust Region Policy Optimization and proximal policy optimization.

- X: https://x.com/johnschulman2

## What John builds

- [Tinker](https://www.anchorterminal.com/tools/tinker.md), graded D, 51.2/100, in Fine-tuning. Thinking Machines Lab's API for model training. Co-founder and Chief Scientist; Tinker research/hiring involvement, researched 2026-10-27.

## Works with

- [Joshua Gross](https://www.anchorterminal.com/people/joshua-gross/), Original Tinker builder; now Director, Muse Product Post-Training at Meta
- [Mira Murati](https://www.anchorterminal.com/people/mira-murati/), Co-founder and CEO

## Backed by

- [Andreessen Horowitz](https://www.anchorterminal.com/investors/andreessen-horowitz/)
- [NVIDIA](https://www.anchorterminal.com/investors/nvidia/)
- [Accel](https://www.anchorterminal.com/investors/accel/)
- [ServiceNow](https://www.anchorterminal.com/investors/servicenow/)
- [Cisco Investments](https://www.anchorterminal.com/investors/cisco-investments/)
- [AMD](https://www.anchorterminal.com/investors/amd/)
- [Jane Street](https://www.anchorterminal.com/investors/jane-street/)

## Questions

### Who is John Schulman?

John Schulman is chief scientist at Thinking Machines Lab, which he joined in February 2025. He co-founded OpenAI in 2015 and led the reinforcement learning team that created ChatGPT, drawing on his work on Trust Region Policy Optimization and proximal policy optimization.

### What does Thinking Machines Lab make?

Anchor Terminal lists Tinker from Thinking Machines Lab.

### Who has invested in Thinking Machines Lab?

The sources our research read name Andreessen Horowitz, NVIDIA, Accel, ServiceNow, Cisco Investments, AMD and Jane Street.

### How are John's tools graded?

Tinker is graded D, 51.2 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.

## Sources

- https://thinkingmachines.ai/news/nvidia-partnership/
- https://thinkingmachines.ai/news/inkling-small/
- https://x.com/miramurati
- https://joschu.net
- https://x.com/search?q=from%3Ajohnschulman2%20Tinker&src=typed_query
- https://x.com/johnschulman2
- https://www.linkedin.com/posts/joshgross_software-engineer-product-activity-7379658412789448704-qys9
- https://www.google.com/search?q=%22Tinker%22+%22Joshua+Gross%22
- https://www.linkedin.com/in/joshgross
- https://thinkingmachines.ai/
- https://thinkingmachines.ai/tinker/
- https://x.com/tinkerapi
- https://tinker-docs.thinkingmachines.ai/support/

Not the same person as [John Schulman](https://www.anchorterminal.com/people/john-schulman/) (OpenAI and Stripe, OpenAI), as far as the research can tell.

These are the people building the tools we list, named for their public role in the company or project behind a listing, from public pages, with the date it was researched.