How to run Kimi K3 in any harness: routing with Baseten Switch

Introduces Baseten Switch, a local routing application that allows users to seamlessly integrate and test open-source models (like Kimi K3 and GLM 5.2 Fast) with existing harnesses (Claude Code, Codex, LangChain CLI). It provides a dashboard for monitoring cost and performance metrics of both open and closed-source models, enabling users to make informed decisions about model selection based on workload, cost, and performance. The post details the setup and usage of Baseten Switch within these harnesses, including command-line instructions and recommended patterns for orchestrator and subagent model assignments.