Anthropic has introduced new features for its AI chatbot, Claude, including hybrid reasoning capabilities.Claude 3.7 Sonnet can respond instantly or provide step-by-step thinking visible to the user.Anthropic also announced a $3.5 billion fundraise, raising its valuation to $61.5 billion.Participants in the funding round include Lightspeed Venture Partners, General Catalyst, and Bessemer Venture Partners.