Together breaks down the five-layer open-source AI stack for agentic coding

CShorten30 · x · 2026-09-10

Together published an article on how the open model stack supports agentic coding, arguing that as open-source models close the quality gap with closed ones, developers and organizations are moving to open stacks for ownership and control.

The stack breaks into five layers:

The author stresses the stack is highly flexible — you can freely mix models, providers, harnesses, and tools to experiment with combinations that fit your agent workflow.

Related event: Together AI Outlines Five-Layer Open Source Agentic Coding Stack(2 posts)→

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