The biggest pre:invent serverless announcements you may have missed
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AWS announced several significant serverless features before re:Invent 2025. Key updates include API Gateway's direct ALB integration (removing NLB requirement) and response streaming support, DynamoDB's multi-attribute composite keys for GSIs, Lambda's IPv6 support eliminating NAT Gateway costs, native tenant isolation mode,
Table of contents
API Gateway integration with ALB (without NLB)API Gateway supports response streamingDynamoDB supports multi-attribute composite keysALB adds built-in JWT verificationStep Functions adds mocking support to its TestState APIS3 supports Attribute-Based Access Control (ABAC)Lambda doesn’t need NAT Gateway anymore!Lambda supports native tenant isolationLambda adds provisioned mode for SQS ESMLambda ups max payload size for async invocations to 1MBLambda supports Python 3.14Lambda’s Rust support goes GACloudFront introduces flat rate price planWrap upRelated PostsSort: