AWS AgentCore Runtime V2 keeps AI agent cold starts near 2 seconds and adds a Web Answer tool
In its weekly roundup on November 9, AWS highlighted the new Amazon Bedrock AgentCore Runtime, now generally available as version 2 in 10 Regions. It snapshots a prepared environment and restores it for each new instance, and it grows and shrinks session memory as needed. AWS also added Web Answer to AgentCore, a tool that runs its own web searches and returns a single answer with citations.
Read the original on AWS News Blog — AWS Weekly Roundup, November 9, 2026 ↗
Why it matters
Slow starts and memory billed at peak usage make AI agents costly to run at scale. In AWS tests, P75 cold starts stayed around 2 seconds for container images from 200 MB to 2 GB, while the first runtime went from about 5.4 to nearly 30 seconds. The price per unit is higher, but AWS expects most agents to use far fewer GB-hours and pay less, without promising it.
What changes
- For developers
- To switch, set platformVersion to V2 when creating or updating a runtime; the container must answer healthy on /ping within 120 seconds, so report health only after setup is done. Web Answer is called over MCP through AgentCore Gateway and is available in US East (N. Virginia).
- For businesses
- Teams running many agent sessions can expect lower bills from memory that is released when idle, while committed baseline pricing for V2 is still to come.
Sources
- AWS News Blog — AWS Weekly Roundup, November 9, 2026 ↗ aws.amazon.com Primary source
Summarized by AI from official sources on November 10, 2026. Spotted a mistake? Let us know. How it works