Option A: ChatGPT: drafts the glossary, you check each meaning
Best when: You want a full first glossary from your own documents.
What it does: ChatGPT drafts the glossary; you check every meaning.
Strong at: Writes and summarises text in one chat.
Limit: Free plan limits file uploads, images and voice.
Free plan: Yes, limited (file uploads, images, voice)
Option B: Gemini Notebook: drafts the glossary from your sources
Best when: You want each meaning tied to a quoted sentence.
What it does: Gemini Notebook drafts from your sources; you check.
Strong at: Answers are grounded in the sources you add.
Limit: Sources capped at 500,000 words or 200 MB each.
Free plan: Yes
Option C: Mistral Vibe: drafts the glossary and lists problems
Best when: You want the draft glossary to come with its own warnings.
What it does: Mistral Vibe drafts and flags problems; you check each flag.
Strong at: Creates documents and chats in one place.
Limit: Agents and long tasks need Pro (paid).
Free plan: Yes