AWS bedrock documentation change

Service: bedrock · 2025-11-25 · Documentation low

File: bedrock/latest/userguide/model-parameters-anthropic-claude-messages-request-response.md

Summary

Added documentation for new 'effort' parameter (beta) and related beta features for Claude Opus 4.5, including configuration examples

Security assessment

The changes introduce a new token management parameter and tool-related features without mentioning security vulnerabilities, protections, or security-related configurations. The effort parameter appears to be a performance/cost optimization feature rather than a security control.

Diff

diff --git a/bedrock/latest/userguide/model-parameters-anthropic-claude-messages-request-response.md b/bedrock/latest/userguide/model-parameters-anthropic-claude-messages-request-response.md
index 22cb4bdd2..ecbb9bfec 100644
--- a//bedrock/latest/userguide/model-parameters-anthropic-claude-messages-request-response.md
+++ b//bedrock/latest/userguide/model-parameters-anthropic-claude-messages-request-response.md
@@ -4,0 +5,2 @@
+Effort parameter (beta)
+
@@ -139,0 +142,3 @@ Context management | `context-management-2025-06-27` | Compatible with Claude So
+Effort | `effort-2025-11-24` | Compatible with Claude Opus 4.5  
+Tool search tool | `tool-search-tool-2025-10-19` | Compatible with Claude Opus 4.5  
+Tool use examples | `tool-examples-2025-10-29` | Compatible with Claude Opus 4.5  
@@ -372,0 +378,35 @@ Example responses with new stop_reason values:
+## Effort parameter (beta)
+
+The `effort` parameter is an alternative to thinking token budgets for Claude Opus 4.5. This parameter tells Claude how liberally it should spend tokens to produce the best result, adjusting token usage across thinking, tool calls, and user communication. It can be used with or without extended thinking mode.
+
+The effort parameter can be set to:
+
+  * `high` (default) – Claude spends as many tokens as needed for the best result
+
+  * `medium` – Balanced token usage
+
+  * `low` – Conservative token usage
+
+
+
+
+To use this feature you must pass the beta header `effort-2025-11-24`.
+
+Request example:
+    
+    
+    {
+        "anthropic_version": "bedrock-2023-05-31",
+        "anthropic_beta": [
+            "effort-2025-11-24"
+        ],
+        "max_tokens": 4096,
+        "output_config": {
+            "effort": "medium"
+        },
+        "messages": [{
+            "role": "user",
+            "content": "Analyze this complex dataset and provide insights"
+        }]
+    }
+