Who makes AI chips for Tesla?

Could you please elaborate on the entity responsible for producing AI chips specifically tailored for Tesla? I'm curious to know if these chips are manufactured in-house by Tesla or if they're sourced from a third-party vendor. Furthermore, if they're sourced externally, could you provide some insight into the selection criteria and partnership dynamics that led to the choice of this particular supplier? Understanding the origins and rationale behind Tesla's AI chips would offer valuable insights into the company's technological strategy and advancements in the field of artificial intelligence.