Mira Murati, former chief technology officer of OpenAI, has launched a new startup, Thinking Machines Lab, after her departure from the company, with media reports valuing the venture at up to $50 billion.

Murati said in a recent post that the company’s first product, Tinker, has now been fully rolled out and has added support for Kimi K2 Thinking, a trillion-parameter reasoning model. She described Kimi K2 Thinking as a “monster-level” model designed specifically for long-horizon reasoning and advanced tool use, and the largest model currently available in Tinker’s product lineup.

Murati founded Thinking Machines Lab together with a group of former OpenAI employees, marking one of the most high-profile AI spin-offs to emerge from the company in recent years.