Option A: ChatGPT: visible-Python recalculation, people decide
Best when: A recomputable statistic where reviewers want visible code
What it does: ChatGPT recalculates in Python; people check, decide
Strong at: Code, denominator and filters are printed
Limit: Generated code and assumptions still need reading
Free plan: Yes
Option B: Claude: computes and drafts, people recompute and decide
Best when: An independent human recomputation before any AI output
What it does: Claude computes and drafts; people recompute, decide
Strong at: Code execution listed on the Free plan
Limit: The analysis tool is being replaced by code execution
Free plan: Yes, limited (session usage cap resets every 5 hours)
Option C: Julius AI: plain-language recalculation with exported tables
Best when: A conversational recalculation with exported tables
What it does: Julius computes and exports; people recompute, decide
Strong at: Plain-language requests, CSV or Excel export
Limit: No inspectable code; recompute without it
Free plan: Yes, limited (75 one-time + 25 daily credits)