Amazon posted its Q4 earnings, with revenue up 10% to $187.79bn
The e-commerce giant's net income rose almost 50%, reaching $20bn.
AWS delivered $28.79bn in revenue, which was just below the target of $28.84bn.
Amazon shares fell more than 4% in late trading on 3 February, wiping out the day's slight gains.
Amazon blamed its guidance miss for the current quarter on exchange rates.
It is now aiming for revenue growth of 5% to 9%, which could be its slowest quarter since going public in 1997.
The multinational is increasing its capital expenditure, aiming to raise it to $100bn in 2025, up from $83bn.
Amazon CFO Brian Olsavsky said the increased spending is related to AWS, its AI services and North American cloud infrastructure.
Amazon is strengthening its data center infrastructure while Chinese AI leader DeepSeek's $6m model challenges notions of billion-dollar investments needed to be a leading competitor.
Amazon's advertising revenue rose to $17.3bn in the Q4 quarter, up 18%.