Ordering costs

src/content/docs/ai-gateway/observability/costs.mdx

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 title: Costs
 pcx_content_type: reference
+sidebar:
+  order: 2
 ---
 
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 ## Supported Providers
 
 AI Gateway currently supports cost metrics from the following providers:
@@ -28,7 +29,6 @@ The cost metric is an **estimation** based on the number of tokens sent and rece
 
 :::caution[Caution]
 
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 Providers may introduce new models or change their pricing. If you notice outdated cost data or are using a model not yet supported by our cost tracking, please [submit a request](https://forms.gle/8kRa73wRnvq7bxL48)
 
 :::
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 AI Gateway allows users to set custom costs when operating under special pricing agreements or negotiated rates. Custom costs can be applied at the request level, and when applied, they will override the default or public model costs.
 For more information on configuration of custom costs, please visit the [Custom Costs](/ai-gateway/configuration/custom-costs/) configuration page.
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