AWS AI Updates: May 1, 2026

1. Bedrock AgentCore Identity Adds On-Behalf-Of Token Exchange

AWS. Amazon Bedrock AgentCore Identity now supports On-Behalf-Of (OBO) token exchange, letting agents swap a user access token for a scoped-down credential that carries both the user and agent identities. The capability removes the need for repeated consent flows when an agent reaches into protected downstream resources, and enforces just-in-time, least-privilege access by narrowing the scope of the issued token. It is generally available in 14 regions across North America, Europe, and Asia Pacific. Source

2. AWS Neuron SDK Ships Agentic Development for NKI Kernels on Trainium

AWS. The Neuron SDK now exposes open-source agentic capabilities that let coding assistants such as Claude Code and Kiro author, debug, and profile NKI kernels for Trainium and Inferentia in natural language. Developers can describe a PyTorch operation and receive a working NKI kernel, ask the agent to diagnose a compilation error, or request a profile-driven report that identifies bottleneck lines of kernel code. The toolkit covers kernel authoring, debugging, documentation lookup, and profile capture and analysis, and is published on GitHub as the foundation for broader Neuron-stack agent support. Source

3. Bedrock AgentCore Adds Optimization Recommendations, Batch Evals, and A/B Testing

AWS. Amazon Bedrock AgentCore introduced an optimization preview that closes the observe-evaluate-improve loop for production agents by analyzing live traces and evaluation outputs to propose tuned system prompts and tool descriptions. Batch evaluations validate proposed changes against predefined test cases, and an integrated A/B testing surface routes traffic to candidate variants and reports statistical significance before rollout. All recommendations require developer approval before they take effect, and the feature is available in every region where AgentCore Evaluations already runs. Source