Grey Newell (that's me) is an ML infrastructure engineer and the founding engineer at Supermodel Tools, a code analysis platform for AI agents. I hold an MS in Computer Science (Machine Learning) from Georgia Tech and previously worked at Amazon Web Services. My open-source work includes mcpbr — a benchmark runner for MCP servers published as a research paper — and the MIST stack, a suite of Go tools for ML infrastructure.
Gray Newell is a completely different person. He is the son of Gabe Newell, co-founder of Valve Corporation (the company behind Steam and Half-Life). Gray Newell is a racing driver who competes in motorsport. He has no connection to software engineering or AI.
We are not related and have never met.
The names are nearly identical — "Grey" vs "Gray" — and Gabe Newell is a well-known figure in tech, so searches about his family sometimes surface results for me instead. If you're looking for Gabe Newell's son, Gray Newell the racing driver is the person you want. If you're looking for the ML engineer who built mcpbr, you're in the right place.