AWS Lambda introduces managed runtimes in public preview for Node.js 26 and Python 3.15
AWS Lambda now offers Node.js 26 and Python 3.15 managed runtimes in public preview, allowing users to test and provide feedback before general availability
AWS Lambda has launched public preview of managed runtimes for Node.js 26 and Python 3.15. This enables customers and partners to test these versions before general availability and share feedback. During the preview, these runtimes may undergo breaking changes and are not covered by the Lambda SLA or AWS technical support. Functions using preview runtimes will automatically upgrade when the runtimes reach GA. To use them, select "Node.js 26 (Preview)" or "Python 3.15 (Preview)" in the Lambda console, or specify nodejs26.x or python3.15 in AWS CLI, CloudFormation, AWS SAM, or AWS CDK. These preview runtimes are available in all commercial regions, AWS GovCloud (US), and China regions at no additional cost.
Why it matters
This update is relevant for AWS Lambda users who want to test new runtime versions early, including those using deployment tools.