Perplexity, an artificial intelligence startup, is in discussions to raise its valuation to $8 billion or higher in its latest funding round, a significant increase from its previous valuation of $3 billion. What Happened: The San Francisco-based company, which has seen its valuation triple in the past year, is looking to raise approximately $500 million in its fourth funding round, reported The Wall Street Journal on Sunday, citing people familiar with the matter. The funding would be a test of investor interest in high-growth AI startups. Perplexity, founded two years ago and backed by Amazo…