Different definitions for intelligence:

• The ability to acquire, understand, and use knowledge.
• the ability to learn or understand or to deal with new or trying situations.
• the ability to apply knowledge to manipulate one’s environment or to think abstractly as measured by objective criteria (such as tests)
• the act of understanding
• the ability to learn, understand, and make judgments or have opinions that are based on reason
• It can be described as the ability to perceive or infer information; and to retain it as knowledge to be applied to adaptive behaviors within an environment or context.

We have plenty of intelligent AI systems already. LLM’s probably fit the definition. Something like Tesla FSD definitely does.