AI assistant startup Instinct has secured $1 billion in Series C funding at a $10 billion valuation, with participation from Sequoia Capital, Benchmark Capital, and Coatue. The round comes just one month after the company raised capital at a $2.5 billion valuation, marking a fourfold increase in value. Instinct operates as a consumer-grade AI agent capable of executing real-world tasks including travel booking, grocery ordering, bill payments, and subscription management via text messaging. The company has not yet launched a mobile app and has not disclosed user metrics or growth data.