AWS updates AgentCore runtime with up to 15× faster session starts

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Amazon Bedrock AgentCore is AWS's managed runtime for deploying agents without maintaining the underlying infrastructure. The updated runtime is available today in AWS Regions across North America, South America, Europe, and Asia Pacific.

Here's what changed:

• Sessions start up to 15× faster, with up to 4× more compute than the earlier runtime.
• Memory is reclaimed after an agent releases it, and idle agents scale to zero. Multi-turn agents with natural pauses consume up to 68% less memory per session.
• Committed baseline pricing bills a per-session memory minimum, with on-demand burst capacity up to four times that baseline.
• Sessions support up to 8 vCPUs and 32 GB, with starts under 2 seconds for container images up to 10 GB.
• Each session runs in its own hardware-isolated Firecracker MicroVM with an identity, access policy, and audit trail.

One catch: session-labeled credentials for per-session storage scoping are planned by re:Invent, not available yet.

Sources: aws.amazon.com