Running Qwen at Home. What Its 8B and 27B Models Can and Cannot Do

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Two Qwen models now fit into a local stack that looks less like a hobby and more like an internal service. The 8B model can remain warm for routine requests. The 27B model adds vision, longer sessions, and credible coding-agent work. But the difficult decisions begin after installation: how much context the hardware can really hold, which runtime settings survive long prompts, whether a router sees image input, and when ownership beats an API bill. This guide works through the memory arithmetic, serving paths, routing gates, cost model, and acceptance tests needed before either backend gets production authority.

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