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Connecting Jev as System 1 to frontier reasoning models

Argues for using deterministic software architecture to connect Jev (System 1) with frontier reasoning models (System 2) into a System 1.5.

Josh Rosen
@JoshARosenArchived 2026.09.22Originally posted 2026.09.21
Josh Rosen @JoshARosenOriginally posted 2026.09.21
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Our job is clear now: build System 1.5 Connect System 1 (Jev) to System 2 (frontier reasoning models) using really good software architecture and deterministic connective tissue.

x.com/josharosen/status/2102029360186196155Archived 2026.09.22 10:15