Anthropic, an AI startup known for its Claude AI model, has rapidly increased its annualized revenue to $4 billion in 2025, up from $3 billion just a month earlier and nearly quadrupling since early 2025. This growth places Anthropic alongside major AI competitors such as OpenAI and Google DeepMind. The company is experiencing intensified competition with Cursor, whose annual recurring revenue has surpassed $500 million. Recently, Cursor's maker Anysphere recruited two key leaders from Anthropic's Claude Code team, signaling shifting dynamics in the AI sector. Amazon currently holds an $8 billion stake in Anthropic and is considering an additional multibillion-dollar investment to deepen their strategic partnership, potentially increasing its stake to over $30 billion but capped at a maximum ownership of 33%. Investor interest in Anthropic is strong, with a new funding round potentially valuing the company at over $100 billion, nearly doubling its valuation from four months ago. This surge in valuation and revenue growth underscores Anthropic's expanding influence in the AI industry amid ongoing competition and investment activity.