Decision Model Jev Outpaces Claude on Task Sorting: 209ms vs 4,689ms at 1/100th the Cost

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Open Walnut, a self-hosted app for managing Claude Code sessions, uses AI to automatically assign project, priority, and tier metadata to new tasks as users type them. Since September 2026, the platform supports Jev, a decision-only model from TypeSafe AI, as an alternative to Claude for these quick classification calls. In a test across 53 tasks with known projects, Jev misclassified 9 while Claude Opus 5 misclassified 12, though Opus answered more fields rather than leaving uncertain ones blank. Jev responded in a median 209 milliseconds at roughly $0.00019 per call, compared to 4,689 milliseconds and $0.025 for Claude Opus 5. Unlike traditional LLMs, Jev returns structured choice answers with confidence scores rather than generating free-form text, eliminating JSON parsing errors and reducing server load.

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