Option A: ChatGPT: maps criteria, then drafts performance levels
Best when: You want the fewest moving parts
What it does: ChatGPT maps and drafts in one chat
Strong at: Criteria and levels stay in one chat
Limit: Brief must suit a general chat tool
Free plan: Yes, limited (uploads and data analysis)
Option B: Gemini Notebook: evidence table, you set criteria, Claude drafts levels
Best when: You want to define the criteria yourself in one project notebook
What it does: Gemini Notebook builds the Data Table; you set criteria
Strong at: Sheet exports carry citations on a second tab
Limit: Claude sees only the teacher-defined map
Free plan: Yes, limited (notebook/source and 5-hour usage caps)
Option C: Khanmigo: drafts the scoring checklist from your criteria
Best when: You prefer a purpose-built scoring tool
What it does: You map criteria; Khanmigo drafts the checklist
Strong at: Dedicated teacher tool for scoring checklists
Limit: Needs a teacher-role account, supported language, allowed region
Free plan: Yes, free for teachers; parents and learners pay $4 a month