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Linum releases an experimental open-weight image model trained for a claimed $21,000

Linum released P-JiT 21K, a 2.18-billion-parameter text-to-image research checkpoint with public weights and code. Linum says its training compute cost about $21,000; that is a company estimate, not a price for customers. The model cannot render text or posters reliably and needs a capable local GPU. Its optional short-prompt helper calls a separate Claude model through OpenRouter.

Linum

P-JiT 21K

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Primary source · Linum · November 4, 2026

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