Choosing Models for an Agentic Chat App on Amazon Bedrock

When building an agentic chat application on Amazon Bedrock, one of the first hard decisions is model selection.

This article is not a rigorous benchmark or formal evaluation. It is simply a set of practical notes from experimenting with multiple Bedrock models while building a personal agentic chat application. Pricing, supported features, and regional behavior change frequently, so you should always validate with official documentation and your own workload before making production decisions.

The app I’m currently building is a serverless agent that gets invoked from Slack. It receives user messages and dynamically calls tools such as memory, task management, calendar integration, web extraction, and custom skills.

So this is not just a simple chatbot.