Thinking Machines Lab has closed a record-setting $2B seed round, led by Andreessen Horowitz, with participation from NVIDIA, Accel, ServiceNow, Cisco, AMD, Jane Street, and others. This investment values the less-than-one-year-old AI company at $12B, making it one of the largest early-stage financings in history. Founded by former OpenAI CTO Mira Murati, the company is building advanced AI systems and preparing to release its first open-source-driven multimodal model. The historic round highlights enormous investor confidence in next-generation AI labs.