diff --git a/integrations/amazon_bedrock/src/haystack_integrations/components/generators/amazon_bedrock/chat/chat_generator.py b/integrations/amazon_bedrock/src/haystack_integrations/components/generators/amazon_bedrock/chat/chat_generator.py
index b65292398f..22af56e121 100644
--- a/integrations/amazon_bedrock/src/haystack_integrations/components/generators/amazon_bedrock/chat/chat_generator.py
+++ b/integrations/amazon_bedrock/src/haystack_integrations/components/generators/amazon_bedrock/chat/chat_generator.py
@@ -508,6 +508,13 @@ def _resolve_flattened_generation_kwargs(generation_kwargs: dict[str, Any]) -> d
             thinking["budget_tokens"] = thinking_budget_tokens
             thinking.setdefault("type", "enabled")
 
+        adaptive_thinking_effort = generation_kwargs.pop("adaptive_thinking_effort", None)
+        if adaptive_thinking_effort is not None:
+            thinking = generation_kwargs.setdefault("thinking", {})
+            thinking.setdefault("type", "adaptive")
+            output_config = generation_kwargs.setdefault("output_config", {})
+            output_config["effort"] = adaptive_thinking_effort
+
         return generation_kwargs
 
     @component.output_types(replies=list[ChatMessage])
diff --git a/integrations/amazon_bedrock/tests/test_chat_generator.py b/integrations/amazon_bedrock/tests/test_chat_generator.py
index 09157b49f7..1206985a91 100644
--- a/integrations/amazon_bedrock/tests/test_chat_generator.py
+++ b/integrations/amazon_bedrock/tests/test_chat_generator.py
@@ -628,9 +628,19 @@ def tool_fn(city: str) -> str:
                     "thinking_budget_tokens": None,
                     "parallel_tool_use": None,
                     "tool_choice_type": None,
+                    "adaptive_thinking_effort": None,
                 },
                 {},
             ),
+            (
+                {
+                    "adaptive_thinking_effort": "max",
+                },
+                {
+                    "thinking": {"type": "adaptive"},
+                    "output_config": {"effort": "max"},
+                },
+            ),
         ],
     )
     def test_prepare_request_params_with_flattened_generation_kwargs(
diff --git a/integrations/anthropic/src/haystack_integrations/components/generators/anthropic/chat/chat_generator.py b/integrations/anthropic/src/haystack_integrations/components/generators/anthropic/chat/chat_generator.py
index c37241d7fe..cc9bd44a49 100644
--- a/integrations/anthropic/src/haystack_integrations/components/generators/anthropic/chat/chat_generator.py
+++ b/integrations/anthropic/src/haystack_integrations/components/generators/anthropic/chat/chat_generator.py
@@ -321,6 +321,13 @@ def _resolve_flattened_generation_kwargs(self, generation_kwargs: dict[str, Any]
             thinking["budget_tokens"] = thinking_budget_tokens
             thinking.setdefault("type", "enabled")
 
+        adaptive_thinking_effort = generation_kwargs.pop("adaptive_thinking_effort", None)
+        if adaptive_thinking_effort is not None:
+            thinking = generation_kwargs.setdefault("thinking", {})
+            thinking.setdefault("type", "adaptive")
+            output_config = generation_kwargs.setdefault("output_config", {})
+            output_config["effort"] = adaptive_thinking_effort
+
         return generation_kwargs
 
     def _process_response(
diff --git a/integrations/anthropic/tests/test_chat_generator.py b/integrations/anthropic/tests/test_chat_generator.py
index efed8ff500..6a5f03b3a3 100644
--- a/integrations/anthropic/tests/test_chat_generator.py
+++ b/integrations/anthropic/tests/test_chat_generator.py
@@ -394,9 +394,19 @@ def test_run_with_output_config(self, chat_messages, mock_anthropic_completion):
                     "thinking_budget_tokens": None,
                     "parallel_tool_use": None,
                     "tool_choice_type": None,
+                    "adaptive_thinking_effort": None,
                 },
                 {},
             ),
+            (
+                {
+                    "adaptive_thinking_effort": "max",
+                },
+                {
+                    "thinking": {"type": "adaptive"},
+                    "output_config": {"effort": "max"},
+                },
+            ),
         ],
     )
     def test_run_with_flattened_generation_kwargs(
@@ -415,6 +425,7 @@ def test_run_with_flattened_generation_kwargs(
         actual_kwargs = mock_anthropic_completion.call_args.kwargs
         assert actual_kwargs.get("tool_choice") == expected_kwargs.get("tool_choice")
         assert actual_kwargs.get("thinking") == expected_kwargs.get("thinking")
+        assert actual_kwargs.get("output_config") == expected_kwargs.get("output_config")
 
     def test_check_duplicate_tool_names(self, tools):
         """Test that the AnthropicChatGenerator component fails to initialize with duplicate tool names."""