AWS Lambda MicroVMs can operate x86 software with no change

Amazon Web Services (AWS) added x86 to Lambda MicroVMs. A MicroVM is a small virtual computer that gives each user or task an isolated space. Before, the alternative was Arm (AWS Graviton). Teams can operate their x86 software and tools in a MicroVM with no recompile. AWS gave no test results.

How it works

Lambda MicroVMs is a serverless system (AWS operates the servers). It isolates code at virtual machine level, starts very fast, and keeps its condition. It is for code that a user or an AI writes.

You select x86 or Arm when you make a MicroVM image from a Dockerfile. Then you start MicroVMs from that image. Arm stays the default.

The proof

AWS gave no speed, cost or test numbers for x86. It tells the possible uses, not if it is good.

What is not known

x86 is not in four regions: Asia Pacific (Hong Kong), Asia Pacific (Malaysia), Asia Pacific (Thailand) and Europe (Spain). AWS gives the price on a different page.

Insight: AWS sells both the safe room and its rules

In October 2026, AWS released Strands Box, a sandbox with a policy language that limits the tasks of an agent. This release makes MicroVMs fit x86 code that teams have. This reads as a plan to give all tools for agent code, and teams that fit to it can find it hard to go. Leaders: find how easy it is to move your agent sandbox.