docs: Bedrock model name is an invocation ID (TH-3486)

src/lib/redirects.ts

@@ -70,6 +70,7 @@ export const redirectMap: Record<string, string> = {
   // Evaluation features/ pages folded into guides/ (revamp); redirect the retired paths
   '/docs/evaluation/features/cicd': '/docs/evaluation/guides/cicd',
   '/docs/evaluation/features/custom': '/docs/evaluation/guides/custom-evals',
+  '/docs/evaluation/features/custom-models': '/docs/evaluation/guides/custom-models',
   '/docs/evaluation/features/evaluate': '/docs/evaluation/guides/running-evaluations',
   '/docs/evaluation/features/futureagi-models': '/docs/evaluation/concepts/evaluator-models',
   '/docs/evaluation/concepts/eval-results': '/docs/evaluation/reference/output-types',

src/pages/docs/evaluation/guides/custom-models.mdx

@@ -26,7 +26,9 @@ With **From model Provider** selected, pick a provider from the **Model Provider
 <img src="/images/docs/evaluation/guides/custom-models/provider-dropdown.png" alt="Model Provider dropdown open, listing Open AI, AWS Bedrock, AWS Sagemaker, Vertex AI, and Azure, with a callout pointing at Open AI" style={{ borderRadius: '5px' }} />
 *Five supported providers, each with its own credential form*
 
-Fill in the provider's form: a **Model Name** to recognize it later, **Input** and **Output Token Cost Per Million Tokens** for cost tracking, and the provider's credentials, an API key for Open AI, region and access keys for Bedrock or Sagemaker, a service account for Vertex AI, endpoint and key for Azure. A token cost can be 0, for a model you host yourself for example, but not negative. A **Form** and **JSON** toggle lets you fill the fields individually or paste a raw config.
+Fill in the provider's form: a **Model Name**, **Input** and **Output Token Cost Per Million Tokens** for cost tracking, and the provider's credentials, an API key for Open AI, region and access keys for Bedrock or Sagemaker, a service account for Vertex AI, endpoint and key for Azure. A token cost can be 0, for a model you host yourself for example, but not negative. A **Form** and **JSON** toggle lets you fill the fields individually or paste a raw config.
+
+For AWS Bedrock, **Model Name is the invocation ID**, not a label you invent. Copy a chat foundation-model ID such as `anthropic.claude-3-haiku-20240307-v1:0`, or a system inference-profile ID such as `us.anthropic.claude-3-5-sonnet-20241022-v2:0`, from the AWS console. A family name such as `Claude` is rejected. Connecting a model does not train or import one in AWS. Save sends a small validation request to AWS and can incur provider charges. New application-profile ARNs, provisioned throughput, and session-token or role credentials are not supported by this form.
 
 <img src="/images/docs/evaluation/guides/custom-models/openai-form.png" alt="Add Model drawer with Open AI selected as the Model Provider, showing Model Name, Input and Output Token Cost Per Million Tokens, a Form/JSON toggle, API Key, and an optional Base URL field, with a callout pointing at the API Key field" style={{ borderRadius: '5px' }} />
 *Open AI's form: model name, token costs, API key, and an optional base URL*