AI startup Anthropic has raised $3.5 billion in a Series E funding round, increasing its valuation to $61.5 billion.The investment was led by Lightspeed Venture Partners and included participation from several other investors.Anthropic plans to utilize the funding to advance AI research, expand compute capacity, and accelerate international growth.The company has developed advanced AI systems, including Claude 3.7 Sonnet, and has collaborated with various businesses across sectors.