Anthropic’s latest funding round has made the OpenAI rival one of the most valuable startups in the world. It’s also turned its founders into billionaires.

Anthropic is adding more rocket fuel to its engine as the high-flying San Francisco startup behind the Claude chatbot and AI platform raised another $3.5 billion at a whopping $61.5 billion valuation.

Anthropic said Monday it raised $3.5 billion in its latest funding round, giving the Amazon- and Google-backed AI startup a $61.5 billion post-money valuation. Lightspeed Venture Partners led the funding round,