AWS Security ChangesHomeSearch

AWS bedrock documentation change

Service: bedrock · 2026-04-10 · Documentation low

File: bedrock/latest/userguide/model-cards-anthropic.md

Summary

Added Claude Mythos Preview model to the list of available Anthropic models in Amazon Bedrock

Security assessment

This change simply adds a new model (Claude Mythos Preview) to the documentation. While the model description mentions cybersecurity capabilities, this is a routine product update adding a new offering. No security vulnerabilities, fixes, or security feature documentation are being added.

Diff

diff --git a/bedrock/latest/userguide/model-cards-anthropic.md b/bedrock/latest/userguide/model-cards-anthropic.md
index 3040ca3e6..48dc9f23d 100644
--- a//bedrock/latest/userguide/model-cards-anthropic.md
+++ b//bedrock/latest/userguide/model-cards-anthropic.md
@@ -10,0 +11 @@ The following Anthropic models are available in Amazon Bedrock:
+[Claude Mythos Preview](./model-card-anthropic-claude-mythos-preview.html)| Claude Mythos Preview (gated research preview) is a new class of intelligence built for ambitious projects, and the world's best model for cybersecurity, autonomous coding, and long-running agents.  
@@ -29 +30 @@ Titan Text Embeddings v2
-Claude Sonnet 4.6
+Claude Mythos Preview