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On Sep 18, 2026 AgentCore microVM Runtime V2 went GA — AWS P75 cold starts 1.9–2.0s vs 5.4–30s on V1, but consumption rates rose to $0.1276/vCPU-hour and $0.0169/GB-hour. Memory reclaim waits 120 seconds.
On Aug 6, 2026 AgentCore Runtime Instances went GA — EC2-backed agents with sessions up to 14 days vs 8-hour microVM Runtime. Field guide: capacity providers, GPU fit, and when idle EC2 burns more than serverless.
Harness GA June 17, Agents Classic cutoff July 30, Payments GA August 18, Memory FGAC August 28. Harness vs Runtime, Gateway Policy, and when transacting agents still should not own checkout.