fix: support converse and 4.7

litellm/llms/bedrock/chat/converse_transformation.py

@@ -59,6 +59,7 @@ from litellm.types.utils import (
     Usage,
 )
 from litellm.utils import (
+    _supports_factory,
     add_dummy_tool,
     any_assistant_message_has_thinking_blocks,
     has_tool_call_blocks,
@@ -1192,9 +1193,6 @@ class AmazonConverseConfig(BaseConfig):
             + supported_config_params
         )
         inference_params.pop("json_mode", None)  # used for handling json_schema
-        # Anthropic-only key. Bedrock expects `outputConfig` (camelCase) and
-        # will reject `output_config` if it leaks through pass-through routes.
-        inference_params.pop("output_config", None)
 
         # Extract requestMetadata before processing other parameters
         request_metadata = inference_params.pop("requestMetadata", None)
@@ -1204,9 +1202,10 @@ class AmazonConverseConfig(BaseConfig):
         output_config: Optional[OutputConfigBlock] = inference_params.pop(
             "outputConfig", None
         )
-        inference_params.pop(
-            "output_config", None
-        )  # Bedrock Converse doesn't support it
+        if not _supports_factory(
+            model=model, custom_llm_provider=None, key="supports_output_config"
+        ):
+            inference_params.pop("output_config", None)
 
         # keep supported params in 'inference_params', and set all model-specific params in 'additional_request_params'
         additional_request_params = {

litellm/model_prices_and_context_window_backup.json

@@ -1006,6 +1006,7 @@
         "supports_vision": true,
         "tool_use_system_prompt_tokens": 346,
         "supports_native_structured_output": true,
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },
@@ -1035,6 +1036,7 @@
         "supports_vision": true,
         "tool_use_system_prompt_tokens": 346,
         "supports_native_structured_output": true,
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },
@@ -1064,6 +1066,7 @@
         "supports_vision": true,
         "tool_use_system_prompt_tokens": 346,
         "supports_native_structured_output": true,
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },
@@ -1093,6 +1096,7 @@
         "supports_vision": true,
         "tool_use_system_prompt_tokens": 346,
         "supports_native_structured_output": true,
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },
@@ -1122,6 +1126,7 @@
         "supports_vision": true,
         "tool_use_system_prompt_tokens": 346,
         "supports_native_structured_output": true,
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },
@@ -1315,6 +1320,7 @@
         "supports_vision": true,
         "tool_use_system_prompt_tokens": 346,
         "supports_native_structured_output": true,
+        "supports_output_config": true,
         "supports_minimal_reasoning_effort": true
     },
     "global.anthropic.claude-sonnet-4-6": {
@@ -1343,6 +1349,7 @@
         "supports_vision": true,
         "tool_use_system_prompt_tokens": 346,
         "supports_native_structured_output": true,
+        "supports_output_config": true,
         "supports_minimal_reasoning_effort": true
     },
     "us.anthropic.claude-sonnet-4-6": {
@@ -1371,6 +1378,7 @@
         "supports_vision": true,
         "tool_use_system_prompt_tokens": 346,
         "supports_native_structured_output": true,
+        "supports_output_config": true,
         "supports_minimal_reasoning_effort": true
     },
     "eu.anthropic.claude-sonnet-4-6": {
@@ -1399,6 +1407,7 @@
         "supports_vision": true,
         "tool_use_system_prompt_tokens": 346,
         "supports_native_structured_output": true,
+        "supports_output_config": true,
         "supports_minimal_reasoning_effort": true
     },
     "au.anthropic.claude-sonnet-4-6": {
@@ -1427,6 +1436,7 @@
         "supports_vision": true,
         "tool_use_system_prompt_tokens": 346,
         "supports_native_structured_output": true,
+        "supports_output_config": true,
         "supports_minimal_reasoning_effort": true
     },
     "anthropic.claude-sonnet-4-20250514-v1:0": {
@@ -1945,6 +1955,7 @@
         "supports_tool_choice": true,
         "supports_vision": true,
         "tool_use_system_prompt_tokens": 159,
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },
@@ -2041,6 +2052,7 @@
         "supports_tool_choice": true,
         "supports_vision": true,
         "tool_use_system_prompt_tokens": 346,
+        "supports_output_config": true,
         "supports_minimal_reasoning_effort": true
     },
     "azure/computer-use-preview": {
@@ -8948,6 +8960,7 @@
         "supports_tool_choice": true,
         "supports_vision": true,
         "tool_use_system_prompt_tokens": 346,
+        "supports_output_config": true,
         "supports_minimal_reasoning_effort": true
     },
     "claude-sonnet-4-5-20250929-v1:0": {
@@ -9142,6 +9155,7 @@
             "us": 1.1,
             "fast": 6.0
         },
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },
@@ -9176,7 +9190,8 @@
             "fast": 6.0
         },
         "supports_max_reasoning_effort": true,
-        "supports_minimal_reasoning_effort": true
+        "supports_minimal_reasoning_effort": true,
+        "supports_output_config": true
     },
     "claude-opus-4-7": {
         "cache_creation_input_token_cost": 6.25e-06,
@@ -9210,7 +9225,8 @@
             "fast": 6.0
         },
         "supports_max_reasoning_effort": true,
-        "supports_minimal_reasoning_effort": true
+        "supports_minimal_reasoning_effort": true,
+        "supports_output_config": true
     },
     "claude-opus-4-7-20260416": {
         "cache_creation_input_token_cost": 6.25e-06,
@@ -9244,7 +9260,8 @@
             "fast": 6.0
         },
         "supports_max_reasoning_effort": true,
-        "supports_minimal_reasoning_effort": true
+        "supports_minimal_reasoning_effort": true,
+        "supports_output_config": true
     },
     "claude-sonnet-4-20250514": {
         "deprecation_date": "2026-05-14",
@@ -27140,14 +27157,16 @@
         "mode": "responses",
         "supports_web_search": true,
         "supports_reasoning": false,
-        "supports_function_calling": true
+        "supports_function_calling": true,
+        "supports_output_config": true
     },
     "perplexity/anthropic/claude-opus-4-7": {
         "litellm_provider": "perplexity",
         "mode": "responses",
         "supports_web_search": true,
         "supports_reasoning": false,
-        "supports_function_calling": true
+        "supports_function_calling": true,
+        "supports_output_config": true
     },
     "perplexity/anthropic/claude-opus-4-5": {
         "litellm_provider": "perplexity",
@@ -31513,6 +31532,7 @@
         "supports_tool_choice": true,
         "supports_vision": true,
         "tool_use_system_prompt_tokens": 346,
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },
@@ -31541,6 +31561,7 @@
         "supports_tool_choice": true,
         "supports_vision": true,
         "tool_use_system_prompt_tokens": 346,
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },
@@ -31653,6 +31674,7 @@
             "search_context_size_low": 0.01,
             "search_context_size_medium": 0.01
         },
+        "supports_output_config": true,
         "supports_minimal_reasoning_effort": true
     },
     "vertex_ai/claude-sonnet-4-5@20250929": {
@@ -38548,6 +38570,7 @@
             "search_context_size_low": 0.01,
             "search_context_size_medium": 0.01
         },
+        "supports_output_config": true,
         "supports_minimal_reasoning_effort": true
     },
     "duckduckgo/search": {

model_prices_and_context_window.json

@@ -1157,6 +1157,7 @@
         "supports_xhigh_reasoning_effort": true,
         "tool_use_system_prompt_tokens": 346,
         "supports_native_structured_output": true,
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },
@@ -1201,6 +1202,7 @@
         "supports_xhigh_reasoning_effort": true,
         "tool_use_system_prompt_tokens": 346,
         "supports_native_structured_output": true,
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },
@@ -1231,6 +1233,7 @@
         "supports_xhigh_reasoning_effort": true,
         "tool_use_system_prompt_tokens": 346,
         "supports_native_structured_output": true,
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },
@@ -1261,6 +1264,7 @@
         "supports_xhigh_reasoning_effort": true,
         "tool_use_system_prompt_tokens": 346,
         "supports_native_structured_output": true,
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },
@@ -1291,6 +1295,7 @@
         "supports_xhigh_reasoning_effort": true,
         "tool_use_system_prompt_tokens": 346,
         "supports_native_structured_output": true,
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },
@@ -1986,6 +1991,7 @@
         "supports_vision": true,
         "supports_xhigh_reasoning_effort": true,
         "tool_use_system_prompt_tokens": 159,
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },
@@ -31591,6 +31597,7 @@
         "supports_vision": true,
         "supports_xhigh_reasoning_effort": true,
         "tool_use_system_prompt_tokens": 346,
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },
@@ -31620,6 +31627,7 @@
         "supports_vision": true,
         "supports_xhigh_reasoning_effort": true,
         "tool_use_system_prompt_tokens": 346,
+        "supports_output_config": true,
         "supports_max_reasoning_effort": true,
         "supports_minimal_reasoning_effort": true
     },

tests/test_litellm/llms/bedrock/chat/test_converse_transformation.py

@@ -3286,7 +3286,8 @@ def test_transform_request_with_output_config():
 
 def test_transform_request_strips_anthropic_output_config():
     """
-    output_config is Anthropic-specific and must never be forwarded to Bedrock.
+    output_config is Anthropic-specific and must be stripped for models that
+    don't declare supports_output_config (e.g. Nova).
     """
     config = AmazonConverseConfig()
     messages = [{"role": "user", "content": "hello"}]
@@ -3307,6 +3308,76 @@ def test_transform_request_strips_anthropic_output_config():
     assert "output_config" not in additional_fields
 
 
+def test_transform_request_forwards_output_config_for_claude_4_6():
+    """
+    For Bedrock Converse models that declare supports_output_config=true
+    (Claude 4.6+), the Anthropic-style `output_config` must flow through
+    `additionalModelRequestFields` so Bedrock forwards the `effort` setting
+    to the Anthropic backend.
+    """
+    from unittest.mock import patch
+
+    config = AmazonConverseConfig()
+    messages = [{"role": "user", "content": "hello"}]
+
+    with patch(
+        "litellm.llms.bedrock.chat.converse_transformation._supports_factory",
+        return_value=True,
+    ):
+        result = config._transform_request(
+            model="us.anthropic.claude-opus-4-6-v1",
+            messages=messages,
+            optional_params={
+                "maxTokens": 64,
+                "output_config": {"effort": "high"},
+            },
+            litellm_params={},
+            headers={},
+        )
+
+    additional_fields = result.get("additionalModelRequestFields", {})
+    assert additional_fields.get("output_config") == {"effort": "high"}
+    # Native Bedrock `outputConfig` (structured outputs) should not be set.
+    assert "outputConfig" not in result
+
+
+def test_transform_request_forwards_output_config_for_claude_4_7():
+    """
+    Claude Opus 4.7 on Bedrock Converse must preserve output_config via
+    additionalModelRequestFields. Reads the real flag from the bundled cost
+    JSON so a regression in model_prices_and_context_window.json would trip
+    this test.
+    """
+    old_env = os.environ.get("LITELLM_LOCAL_MODEL_COST_MAP")
+    old_cost = litellm.model_cost
+    os.environ["LITELLM_LOCAL_MODEL_COST_MAP"] = "True"
+    litellm.model_cost = litellm.get_model_cost_map(url="")
+    try:
+        config = AmazonConverseConfig()
+        messages = [{"role": "user", "content": "hello"}]
+
+        result = config._transform_request(
+            model="us.anthropic.claude-opus-4-7",
+            messages=messages,
+            optional_params={
+                "maxTokens": 64,
+                "output_config": {"effort": "max"},
+            },
+            litellm_params={},
+            headers={},
+        )
+
+        additional_fields = result.get("additionalModelRequestFields", {})
+        assert additional_fields.get("output_config") == {"effort": "max"}
+        assert "outputConfig" not in result
+    finally:
+        litellm.model_cost = old_cost
+        if old_env is None:
+            os.environ.pop("LITELLM_LOCAL_MODEL_COST_MAP", None)
+        else:
+            os.environ["LITELLM_LOCAL_MODEL_COST_MAP"] = old_env
+
+
 def test_transform_response_native_structured_output():
     """Test response handling when model returns JSON as text content (native structured output)."""
     response_json = {