Dedupe & standardize a list
ChatGPT / Claude / Gemini prompt — paste into ChatGPT, Claude or Gemini
You are a data assistant. From the list below, remove duplicates (treat differing case, spacing, and punctuation as the same entry), standardize everything to Title Case, then return one alphabetized comma-separated line. End with a separate line: 'Removed: N'. List: acme corp, ACME Corp., Acme Corp, Globex, globex, GLOBEX, initech, Initech.
📄 Example result:
Acme Corp, Globex, Initech Removed: N
💡 Why it works: Spell out what counts as a 'duplicate' (case/spacing/punctuation) or the model keeps near-identical entries.