FastBI vs ChatGPT data analysis
ChatGPT can analyse a spreadsheet by writing and running code. It is flexible, but the model is in the loop for the arithmetic, so numbers can drift. FastBI computes every measure deterministically and uses the model only for naming and narration — and can run that model locally.
| Dimension | ChatGPT data analysis | FastBI |
|---|---|---|
| Who does the math | The model (code it writes) | Deterministic pandas — hand-verifiable |
| Reproducibility | Varies per run | Same manifest every time (schema fingerprint) |
| Dashboard | Ad-hoc charts | Fixed artboard, KPI strip, WYSIWYG export |
| Data privacy | Sent to the provider | Pro local-LLM mode keeps data on your machine |
| Measures | Re-derived each chat | Persisted, editable, confidence-tiered |
| Price | Subscription | Free / $9 / $24 |