diff --git a/crates/bedrock/src/bedrock.rs b/crates/bedrock/src/bedrock.rs
index 19d210208e..9df36df46f 100644
--- a/crates/bedrock/src/bedrock.rs
+++ b/crates/bedrock/src/bedrock.rs
@@ -221,7 +221,7 @@ fn thinking_request_fields(thinking: &Thinking) -> HashMap<String, Document> {
         Thinking::Enabled {
             budget_tokens: None,
         } => {}
-        Thinking::Adaptive { effort: _ } => {
+        Thinking::Adaptive { effort } => {
             fields.insert(
                 "thinking".to_string(),
                 Document::from(HashMap::from([
@@ -232,6 +232,13 @@ fn thinking_request_fields(thinking: &Thinking) -> HashMap<String, Document> {
                     ),
                 ])),
             );
+            fields.insert(
+                "output_config".to_string(),
+                Document::from(HashMap::from([(
+                    "effort".to_string(),
+                    Document::String(effort.as_str().to_string()),
+                )])),
+            );
         }
         Thinking::Disabled => {
             // On Claude Opus 5 omitting the `thinking` field means adaptive
@@ -306,6 +313,20 @@ mod tests {
         }
     }
 
+    #[test]
+    fn test_adaptive_thinking_serializes_effort_in_output_config() {
+        let fields = thinking_request_fields(&Thinking::Adaptive {
+            effort: BedrockAdaptiveThinkingEffort::XHigh,
+        });
+
+        let thinking = fields.get("thinking").expect("thinking field");
+        assert_eq!(string_field(thinking, "type"), Some("adaptive"));
+        assert_eq!(string_field(thinking, "display"), Some("summarized"));
+
+        let output_config = fields.get("output_config").expect("output_config field");
+        assert_eq!(string_field(output_config, "effort"), Some("xhigh"));
+    }
+
     #[test]
     fn test_disabled_thinking_serializes_opt_out_without_effort() {
         let fields = thinking_request_fields(&Thinking::Disabled);
diff --git a/crates/bedrock/src/models.rs b/crates/bedrock/src/models.rs
index eb5d40ac8f..75a3096986 100644
--- a/crates/bedrock/src/models.rs
+++ b/crates/bedrock/src/models.rs
@@ -788,10 +788,14 @@ impl ConverseModel {
 
             // Canada has no Claude-specific `ca.` profiles. AWS instead lists
             // ca-central-1 and ca-west-1 as source regions of the US geo
-            // profile for these models, which keeps data within US and Canada
-            // regions. See the per-model cards, e.g.
-            // <https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-anthropic-claude-opus-5.html>.
-            (Self::ClaudeOpus5, "ca") => Ok(format!("us.{}", model_id)),
+            // profiles for these models, which keep data within US and Canada
+            // regions:
+            // <https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-anthropic-claude-opus-5.html>
+            // <https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-anthropic-claude-opus-4-8.html>
+            // <https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-anthropic-claude-opus-4-7.html>
+            (Self::ClaudeOpus5 | Self::ClaudeOpus4_8 | Self::ClaudeOpus4_7, "ca") => {
+                Ok(format!("us.{}", model_id))
+            }
 
             // EU region inference profiles
             (
@@ -826,7 +830,9 @@ impl ConverseModel {
             // (plus `global.`):
             // <https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-anthropic-claude-opus-5.html>
             (
-                Self::ClaudeSonnet4_6
+                Self::ClaudeOpus4_8
+                | Self::ClaudeOpus4_7
+                | Self::ClaudeSonnet4_6
                 | Self::ClaudeSonnet4_5
                 | Self::ClaudeHaiku4_5
                 | Self::Nova2Lite,
@@ -1242,6 +1248,14 @@ mod tests {
             ConverseModel::ClaudeOpus5.cross_region_inference_id("ap-northeast-1", false)?,
             "anthropic.claude-opus-5"
         );
+        assert_eq!(
+            ConverseModel::ClaudeOpus4_8.cross_region_inference_id("ap-northeast-1", false)?,
+            "jp.anthropic.claude-opus-4-8"
+        );
+        assert_eq!(
+            ConverseModel::ClaudeOpus4_7.cross_region_inference_id("ap-northeast-3", false)?,
+            "jp.anthropic.claude-opus-4-7"
+        );
         assert_eq!(
             ConverseModel::ClaudeSonnet4_5.cross_region_inference_id("ap-northeast-3", false)?,
             "jp.anthropic.claude-sonnet-4-5-20250929-v1:0"
@@ -1265,6 +1279,14 @@ mod tests {
             ConverseModel::ClaudeOpus5.cross_region_inference_id("ca-central-1", false)?,
             "us.anthropic.claude-opus-5"
         );
+        assert_eq!(
+            ConverseModel::ClaudeOpus4_8.cross_region_inference_id("ca-west-1", false)?,
+            "us.anthropic.claude-opus-4-8"
+        );
+        assert_eq!(
+            ConverseModel::ClaudeOpus4_7.cross_region_inference_id("ca-central-1", false)?,
+            "us.anthropic.claude-opus-4-7"
+        );
         Ok(())
     }