Cortex v1.0, a highly scalable and fast Prometheus implementation, has been released for production use, marking a significant milestone for Grafana Labs, which has utilized Cortex in its Grafana Cloud managed logging and metrics platform for several years. As Grafana Labs transitions focus to Grafana Mimir, an open-source long-term storage for Prometheus, Cortex continues to gain traction in large organizations seeking robust, enterprise-ready monitoring solutions. Cortex's new version introduces enhancements such as production documentation, pre-configured Grafana dashboards, and Prometheus alerts to facilitate deployment at scale. The platform supports high availability by deduplicating metrics from HA Prometheus pairs and enables real-time queries against extensive data sets. Widely adopted by companies like Gojek, Cortex has proven its capability to handle large volumes of data, demonstrating its reliability and scalability in diverse production environments. The release has been supported by numerous contributors and remains a valuable resource for those aiming to extend Prometheus's functionality.