Andrew Tulloch, an Australian AI engineer raised in Perth, has reportedly rejected a US$1 billion (A$1.55 billion) compensation package from Mark Zuckerberg's Meta.

Tulloch, a University of Sydney mathematics graduate with a near-perfect ATAR, co-founded the AI start-up Thinking Machines Lab earlier this year with former OpenAI CTO Mira Murati.

Thinking Machines Lab, focused on building safer, customisable multimodal AI systems, has already secured US$2 billion in seed funding and is now valued at$12 billion. Investors include major tech firms Nvidia, AMD and Cisco, and the Albanian government.

According to the Wall Street Journal, Meta attempted to acquire the company and later made direct offers to key employees. Tulloch declined the offer, which Meta dismissed as "inaccurate and ridiculous."