20 Best Open-Source AI Decision Models You Can Run Locally in 2026

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Last month I asked a frontier LLM a simple question about a support ticket: billing, shipping or technical?

It gave me four paragraphs.

I needed one word, and I needed to know how sure it was.

That gap, between an essay and a decision, is where a new class of AI model lives.

TypeSafe called it a System One model when it launched Jev on 15 September 2026.

Within a month, the community leaderboard was tracking more than 160 entries, and even the best open models now beat the hosted original.

Here is the part that excites me most.

You can run them yourself, locally, on modest hardware.

No API key, no per-call bill, no data leaving your building.

This guide gives you two top tens.

The Top Ten for Enterprisesranks the most accurate open models for anyone who can put a DGX Spark or a...

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