Option A: ChatGPT: pairs lines with receipts and drafts the report
Best when: Many images; one chat holds pairing and report
What it does: ChatGPT pairs and reports; you check, approve
Strong at: The checked pairing table feeds the report directly
Limit: Image values may extract inaccurately; check verdicts
Free plan: Yes, limited (uploads and analysis capped)
Option B: Claude: reads the receipts; the approver applies thresholds
Best when: You pair by file; the approver applies thresholds
What it does: Claude reads receipts; you and the approver decide
Strong at: No AI step applies a policy threshold
Limit: Pairing by file name adds manual work
Free plan: Yes
Option C: Gemini: checklist first, then line-by-line checking
Best when: Rules fixed in a checklist before any AI step
What it does: Gemini checks line by line; you and approver confirm
Strong at: Both checks read from the same stated rules
Limit: 38 images span four batches, combined by hand
Free plan: Yes