Serverless ICYMI Q3 2026

This article recaps the most impactful AWS serverless launches and features from Q3 2026, including new capabilities for Lambda, EventBridge, Step Functions, and AI agents.

• Lambda MicroVMs provide VM-level isolation with near-instant startup for stateful workloads and AI agent sandboxes
• Lambda Managed Instances now support 90-minute timeouts and Graviton5 processors for improved performance
• EventBridge relaunched Custom event bus with shared access across accounts and new event sources from Secrets Manager and S3
• Lambda functions outside VPCs gain scalable network bandwidth up to 3,000 Mbps for faster data transfers
• SnapStart now supports container images, reducing startup times to sub-second latency
• Durable functions SDK available for .NET with support for custom SDKs and Pydantic AI integration
• Step Functions automatically adds SDK integrations for new services within weeks of release
• Amazon SNS now supports 1 MiB message payloads, four times the previous limit
• Amazon Bedrock AgentCore introduces new runtime with memory reclamation, runtime instances, and managed consent portal
• New AI models available including Claude Fable 5.1, GPT-6 variants, and Kimi K3

Q3 2026 brings significant enhancements to serverless compute, event-driven architecture, and AI agent capabilities, enabling more complex workloads and improved performance across AWS services.