Amazon Rerank 1.0

Amazon's first-party reranker model in Bedrock: scores and reorders document chunks by relevance to a query, callable via the Rerank API operation or inside Bedrock Knowledge Bases. Billed PER SEARCH UNIT, not per token — AWS defines a search unit as one query containing up to 100 document chunks (docs: 'Reranking is priced per query. A query is a single call to the reranker model that can contain up to 100 document chunks.'), so all per-token price fields are null. Rate is the us-west-2 on-demand price from the AWS Price List API (SKU Z7M6S4MRBXNXJRB4: $0.001 per search unit = $1.00 per 1,000). Text only. Single-region model: ap-northeast-1, ca-central-1, eu-central-1, us-west-2 — explicitly NOT available in us-east-1, where Cohere Rerank 3.5 is the only reranker. No token context window is published (the limit is expressed in document chunks per query), and AWS declares no deprecation or EOL date, so those fields stay null. No release date published in the docs, so `released` is null rather than invented.

Source: Amazon official documentation ↗

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Amazon Rerank 1.0 — questions & answers