Meta's AI spending spree is Wall Street's focus in second-quarter earnings
1. Meta's AI strategy overhauled after failure with Llama 4 model. 2. Zuckerberg is investing billions in AI to regain competitive edge. 3. Revenue growth slowed to 15%, lowest since early 2023. 4. Meta continues hiring top AI talent despite disappointing developments. 5. Open-source strategy under review as Llama fails to impress developers.