Claude and ChatGPT can explain a formula, build a model structure, and answer questions about your data. What they produce lives in a chat window — and disappears when you close it. Layerz is the structural layer that persists what AI builds.
| Claude / ChatGPT in Excel | Layerz | |
|---|---|---|
| Formula generation | ✓ | ✓ |
| Model explanation | ✓ Excellent | ✓ |
| Structural persistence | ✗ Chat session only | ✓ Stored, versionable |
| Version control | ✗ | ✓ |
| Audit trail | ✗ | ✓ Every change logged |
| Logic separated from data | ✗ Output baked into cells | ✓ MDK structure |
| Reuse across deals | ✗ Rebuild each time | ✓ Template system |
| Agent API / MCP | ✓ (Claude) | ✓ |
| Excel export | ✗ No direct export | ✓ Standard .xlsx |
| File privacy | ✗ Sent to third-party API | ✓ Not retained |
| Cost | Per-token (varies) | Free · Pro at 89 €/month |
When you ask Claude to build a model in Excel, the logic lives in the AI's response — one-time output, not a reusable artifact. Next session, you start over. Layerz persists the structure: variables, timelines, formula logic, and assumptions survive across sessions, users, and deals. Claude can operate on Layerz models through the API — which means you get both AI reasoning and structural persistence, not one or the other.
No credit card · Your data is not retained · Export to standard .xlsx