Does a crafted item's rarity vary?

No: a crafted item has its blueprint's rarity; only quality varies.

For a higher rarity, craft from a rarer blueprint. Rarer blueprints cost more materials.
For better quality odds, research the blueprint. From T4 you can't roll Flawed.
Extra modifiers are added afterwards with consumables: Hermes augmenter and Norn overclocker add one each (max 4). Adding one to a Normal item makes it Advanced; the Laplace Probability Matrix adds four, making it Prototype.
A Ptah crucible rerolls quality after the craft.
The Forge keeps working while you're offline.

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Sources (8)

Speaker	Tier	Said on
Not named	Trusted player	1 Oct 2026
phyzixteacher	Developer	3 Oct 2026

Paraphrased from the Citadel Discord. Developers and official documents are named; other players by trust tier. Last verified 3 Oct 2026 for Beta 1 (wipe 1).

Also drawn from

Answer: What does researching a blueprint do?: Rarer blueprints raise material costs
Answer: What does researching a blueprint do?: Higher tiers give better odds of high quality; from T4 you can't roll Flawed
Answer: What do the consumables do?: Hermes augmenter and Norn overclocker add modifiers, max 4
Codex: Laplace Probability Matrix (community tutorial video; a developer in Discord): Adds four modifiers to a Normal item, making it Prototype
Game reference: Items (rarity ladder): Adding a modifier to a Normal item makes it Advanced
Answer: What do the consumables do?: Ptah crucible rerolls quality

Collected from the Citadel Discord and added on 3 Oct 2026.