> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zespan.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Models — per-model usage, reliability, and latency

> A per-model table of usage, cost, latency, error rate, and agent adoption, plus a Lifecycle column flagging models with a provider-announced end-of-life.

The Models page (labeled **Model registry** in the dashboard) breaks down every model your project has called over the selected time range, so you can compare cost, latency, and reliability model-by-model rather than only in aggregate.

## Summary stats

Four figures across the top of the page, aggregated over the selected range:

| Stat           | What it shows                                           |
| -------------- | ------------------------------------------------------- |
| Models used    | Distinct model ids called in range                      |
| Total requests | Sum of calls across every model                         |
| Total cost     | Sum of spend across every model                         |
| Avg error rate | Mean per-model error rate (not weighted by call volume) |

## Table columns

| Column    | Details                                                                                                      |
| --------- | ------------------------------------------------------------------------------------------------------------ |
| Model     | Model id, with a share-of-calls bar underneath and a status dot (green under 1% error rate, red at or above) |
| Provider  | The provider that served the call                                                                            |
| Lifecycle | See [below](#lifecycle-column)                                                                               |
| Calls     | Total calls in range                                                                                         |
| Cost      | Total spend in range, with a share-of-total bar                                                              |
| Cost/req  | Average cost per call                                                                                        |
| Latency   | p50/p95 latency bar                                                                                          |
| Errors    | Error count; blank when zero                                                                                 |
| Agents    | Count of distinct agents that called this model                                                              |

Sort by cost, calls, errors, or latency using the selector in the page header; search and filter by provider using the controls above the table.

## Lifecycle column

The Lifecycle column shows a countdown chip for any model that either has an open [Model Lifecycle](/dashboard/model-lifecycle) finding in this project, or simply has a known retirement date in Zespan's catalogue — even if that date is far enough out that it hasn't produced a finding yet. This is the one place on this page where a model can show lifecycle information without there being an active alert: the catalogue is broader than "worth notifying about."

The chip's color follows the same urgency ladder as the findings page:

* **Neutral** (grey) — more than 30 days out, or catalogued but not yet been called
* **Warning** (amber) — 30 days or fewer remaining
* **Danger** (red) — 7 days or fewer remaining, or already retired

A model with no catalogue entry and no finding shows a plain dash. When at least one model on the page has an open finding, a banner appears above the table linking to the full [Model lifecycle findings page](/dashboard/model-lifecycle).

## Next steps

* [Model Lifecycle](/dashboard/model-lifecycle) — the full deprecation radar: findings, the re-raise ladder, and dismissing
* [Costs](/dashboard/costs#cost-by-model) — the cost-by-model chart this table's Cost column complements
* [Model lifecycle feed reference](/reference/model-lifecycle-feed) — where the Lifecycle column's dates come from