AWS Ships AgentCore Runtime V2 with Snapshot-Based Cold Starts

Amazon Web Services released a new AgentCore Runtime, now generally available, that reduces cold-start latency and memory costs for agents running on the platform¹. Sessions start with minimal memory, scale on demand, and release unused capacity rather than holding peak allocation. The runtime snapshots each prepared environment and restores it for new instances, keeping P75 cold starts at approximately 2 seconds for images up to 2 GB, compared with nearly 30 seconds on the original runtime for images of that size.