Grafana v4.5 introduces significant improvements and new features across various integrations, including Prometheus, Elasticsearch, MySQL, and the Table panel. The release enhances the Prometheus Query Editor with full syntax highlighting and auto-completion, while Elasticsearch sees the addition of ad-hoc filters and the ability to create table cell links for drilling down into detailed dashboards or ticket systems. A new Query Inspector feature aids in troubleshooting query responses. Enhancements include support for GitHub OAuth with large organizations and updated Graphite API calls. Notable changes involve a renaming in InfluxDB/Elasticsearch options to "Min time interval," affecting how time intervals are handled in dashboards. Minor changes and bug fixes improve functionality and security, and the release acknowledges the community's contributions to the development of Grafana.