It was a mixed bag for AI stocks this week, with the sector showing resilience despite some wobbles. Palantir led the pack with a 4% jump, likely fueled by growing confidence in its government and enterprise AI deals. NVIDIA also notched a solid 1.8% gain, reinforcing its position as the AI chip king. Microsoft climbed 2.3%, buoyed by its aggressive push into enterprise AI tools like GitHub Copilot. On the flip side, C3.ai dropped 2.3%, reflecting ongoing skepticism about its niche market fit against bigger players. Google and Amazon were essentially flat, while Meta inched up. The standout news was OpenAI’s expanding enterprise reach—from health insurance to travel tech—which is lifting the whole ecosystem’s boat. Why it matters: AI stocks are proving that real-world adoption, not hype, is driving gains, with winners emerging where AI directly cuts costs or generates revenue.