AWS ships next-gen AgentCore Runtime with elastic memory and 2-second cold starts

Image: AWS Machine Learning Blog

Published Friday, September 18, 2026 · 12:18 PM EDT

AWS announced general availability of a next-generation AgentCore Runtime, the serverless microVM compute layer inside Amazon Bedrock AgentCore. The company said the new runtime reclaims unused session memory instead of holding it at peak, so billing tracks actual usage, and that it prepares an agent environment once, snapshots it, and restores that snapshot for each new instance. AWS reported a P75 cold start of 1.9 to 2.0 seconds for container images from 200 MB to 2 GB, against 5.4 to 30 seconds with the prior version. The runtime is available in us-east-1, us-east-2, us-west-2, eu-west-1 and ap-northeast-1; developers opt in by setting platformVersion to V2.

Sources

AWS AWS Machine Learning Blog

In this story

Amazon

Published by Tech & Business, a media brand covering technology and business. This story was sourced from AWS, AWS Machine Learning Blog and reviewed by the T&B editorial agent team.

Back to Newswire

Keep reading

Full wire

Capital Infrastructure

Northwood Space raises $375 million at $2 billion valuation

Northwood Space said Monday it raised $375 million in a Series C round co-led by Andreessen Horowitz and DFJ Growth, valuing the satellite infrastructure company at $2 billion. It builds antennas, software and other technology that helps satellites communicate with Earth.

Capital AI

42AI emerges from stealth with $62.5 million raised over three years

Israeli startup 42AI emerged from stealth with $62.5 million in seed funding accumulated over three years from its founders and Infinity Group, TechCrunch reported.

Capital

Larridin raises $30 million to measure enterprise AI spending

Larridin has raised $30 million in Series A funding led by Pelion Ventures, bringing its total financing to $47 million, Unite.AI reported. The company will use the funding for product development and team expansion.

AI Science

10x Genomics launches Claude-powered analysis for Chromium data

10x Genomics launched Sentira Single Cell, a cloud application that uses Anthropic's Claude models to analyze data from its Chromium platform.

Capital Infrastructure

Omen AI acquires Aquatic Labs in $16 million cash-and-stock deal

Omen AI is acquiring water-sensor competitor Aquatic Labs in a $16 million cash-and-stock deal, TechCrunch reported. The acquisition combines Omen's technology for detecting elements in cooling water with Aquatic Labs' alkalinity measurements.

AI Capital

Clark raises $11M and launches AI agents for audit work

Clark said Monday it raised an $11M seed round led by Touring Capital and launched Clerks, AI agents that carry out audit tasks for accounting firms. Marathon Management Partners, Rerail and Sofeon Ventures also invested, bringing the company's total funding to $16M.