Option A: ChatGPT: builds the gap map and dated plan
Best when: You want the fewest moving parts
What it does: ChatGPT maps and plans; you check and approve
Strong at: Both stages run in one chat
Limit: You must check its reading of your diagnostics yourself
Free plan: Yes, limited (uploads and data analysis)
Option B: Gemini Notebook: cites the gap map, then plans
Best when: Traceability matters: each gap points to its source passage
What it does: Gemini Notebook maps and plans; you check and export
Strong at: Every claimed gap cites the passage behind it
Limit: Plan export to Docs or Sheets is manual
Free plan: Yes, limited (notebook and source caps)
Option C: Claude: drafts the gap table, then the plan
Best when: You want to check the gap table before any plan is made
What it does: Claude drafts both; you check each stage
Strong at: Plan builds only on a table you checked
Limit: Table quality depends on your pasted diagnostics
Free plan: Yes, limited (5-hour and weekly usage caps)