AWS has launched Lambda Managed Instances, allowing users to run Lambda functions on EC2 instances while retaining serverless management benefits. This addresses the challenge many teams face when they need specialized compute options or cost efficiencies for steady-state workloads, which often leads to a shift back to managing infrastructure. With this capability, AWS handles the operational complexities like instance lifecycle management, OS patching, and auto-scaling, letting developers focus on their code. Users can define how Lambda functions run on EC2 by creating Capacity providers, specifying parameters like VPC, subnets, security groups, and instance types. Lambda Managed Instances support EC2 pricing plans, including Compute Savings Plans and Reserved Instances, which can offer discounts of up to 72% compared to on-demand pricing. Each execution environment can handle multiple requests, optimizing resource usage and reducing costs. AWS promises low latency by routing requests to pre-provisioned environments, avoiding cold starts. The setup integrates with existing AWS tools and workflows, enabling users to migrate existing Lambda functions without code changes. Key features include built-in protections against traffic spikes, with a default capacity provider absorbing a 50% increase in traffic without scaling. AWS automatically manages security patches and maintains a maximum 14-day lifetime for instances to meet compliance standards. Pricing consists of standard Lambda request charges, EC2 instance costs based on existing agreements, and a 15% management fee for AWS’s oversight of the instances. Lambda Managed Instances currently support Node.js, Java, .NET, and Python runtimes, with more languages expected soon.