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

# Cost & pricing

> How Foglamp prices spans.

Foglamp prices every span **at ingest**, the moment it arrives, from the token
dimensions the provider reported. Cost is never recomputed downstream, so what
you see in a trace is what was charged when it landed.

## How pricing works

Each [usage dimension](/concepts/data-model#usage) is priced independently
against a model price table sourced from
[OpenRouter](https://openrouter.ai/api/v1/models), refreshed every 24 hours. The
dimensions priced are prompt, completion, request, image, web-search, internal
reasoning, cache-read, and cache-write tokens.

The span detail panel shows a **pricing source** so you can see where each
cost came from.

<Note>
  A model Foglamp can't find a price for is labelled **`(unknown)`** in cost
  breakdowns — never silently treated as `$0`. The Overview KPI's "% priced"
  tells you what fraction of LLM spans were priced; a low number usually means
  you're running a model OpenRouter doesn't list yet.
</Note>

## Where cost shows up

* **[Overview](/dashboard/overview)** — total cost, cost-over-time (stacked by
  model), and per-model / per-agent cost tables.
* **[Traces](/dashboard/traces)** — per-span cost and pricing source.
* **[Agents](/dashboard/agents)** and **[Workflows](/dashboard/workflows)** —
  cost rolled up by actor and by run.
* **[Alerts](/dashboard/alerts)** — alert on `cost` over a window.