diff --git a/client-sdks/stainless/openapi.yml b/client-sdks/stainless/openapi.yml
index ff86e30e1..3a6735cbc 100644
--- a/client-sdks/stainless/openapi.yml
+++ b/client-sdks/stainless/openapi.yml
@@ -1810,7 +1810,7 @@ paths:
         content:
           application/json:
             schema:
-              $ref: '#/components/schemas/RegisterScoringFunctionRequestLoose'
+              $ref: '#/components/schemas/RegisterScoringFunctionRequest'
         required: true
       deprecated: true
   /v1/scoring-functions/{scoring_fn_id}:
@@ -3300,7 +3300,7 @@ paths:
         content:
           application/json:
             schema:
-              $ref: '#/components/schemas/RegisterDatasetRequestLoose'
+              $ref: '#/components/schemas/RegisterDatasetRequest'
         required: true
       deprecated: true
   /v1beta/datasets/{dataset_id}:
@@ -3557,7 +3557,7 @@ paths:
         content:
           application/json:
             schema:
-              $ref: '#/components/schemas/BenchmarkConfig'
+              $ref: '#/components/schemas/RunEvalRequest'
         required: true
   /v1alpha/eval/benchmarks/{benchmark_id}/jobs/{job_id}:
     get:
@@ -10586,6 +10586,14 @@ components:
       - scores
       title: EvaluateResponse
       description: The response from an evaluation.
+    RunEvalRequest:
+      properties:
+        benchmark_config:
+          $ref: '#/components/schemas/BenchmarkConfig'
+      type: object
+      required:
+      - benchmark_config
+      title: RunEvalRequest
     Job:
       properties:
         job_id:
@@ -11169,6 +11177,67 @@ components:
       - $ref: '#/components/schemas/CompletionInputType'
         title: CompletionInputType
       title: StringType | ... (9 variants)
+    RegisterScoringFunctionRequest:
+      properties:
+        scoring_fn_id:
+          type: string
+          title: Scoring Fn Id
+        description:
+          type: string
+          title: Description
+        return_type:
+          anyOf:
+          - $ref: '#/components/schemas/StringType'
+            title: StringType
+          - $ref: '#/components/schemas/NumberType'
+            title: NumberType
+          - $ref: '#/components/schemas/BooleanType'
+            title: BooleanType
+          - $ref: '#/components/schemas/ArrayType'
+            title: ArrayType
+          - $ref: '#/components/schemas/ObjectType'
+            title: ObjectType
+          - $ref: '#/components/schemas/JsonType'
+            title: JsonType
+          - $ref: '#/components/schemas/UnionType'
+            title: UnionType
+          - $ref: '#/components/schemas/ChatCompletionInputType'
+            title: ChatCompletionInputType
+          - $ref: '#/components/schemas/CompletionInputType'
+            title: CompletionInputType
+          title: StringType | ... (9 variants)
+        provider_scoring_fn_id:
+          anyOf:
+          - type: string
+          - type: 'null'
+        provider_id:
+          anyOf:
+          - type: string
+          - type: 'null'
+        params:
+          anyOf:
+          - oneOf:
+            - $ref: '#/components/schemas/LLMAsJudgeScoringFnParams'
+              title: LLMAsJudgeScoringFnParams
+            - $ref: '#/components/schemas/RegexParserScoringFnParams'
+              title: RegexParserScoringFnParams
+            - $ref: '#/components/schemas/BasicScoringFnParams'
+              title: BasicScoringFnParams
+            discriminator:
+              propertyName: type
+              mapping:
+                basic: '#/components/schemas/BasicScoringFnParams'
+                llm_as_judge: '#/components/schemas/LLMAsJudgeScoringFnParams'
+                regex_parser: '#/components/schemas/RegexParserScoringFnParams'
+            title: LLMAsJudgeScoringFnParams | RegexParserScoringFnParams | BasicScoringFnParams
+          - type: 'null'
+          title: Params
+      type: object
+      required:
+      - scoring_fn_id
+      - description
+      - return_type
+      title: RegisterScoringFunctionRequest
     RegisterShieldRequest:
       properties:
         shield_id:
@@ -11227,6 +11296,31 @@ components:
       - $ref: '#/components/schemas/RowsDataSource'
         title: RowsDataSource
       title: URIDataSource | RowsDataSource
+    RegisterDatasetRequest:
+      properties:
+        purpose:
+          $ref: '#/components/schemas/DatasetPurpose'
+        source:
+          anyOf:
+          - $ref: '#/components/schemas/URIDataSource'
+            title: URIDataSource
+          - $ref: '#/components/schemas/RowsDataSource'
+            title: RowsDataSource
+          title: URIDataSource | RowsDataSource
+        metadata:
+          anyOf:
+          - additionalProperties: true
+            type: object
+          - type: 'null'
+        dataset_id:
+          anyOf:
+          - type: string
+          - type: 'null'
+      type: object
+      required:
+      - purpose
+      - source
+      title: RegisterDatasetRequest
     RegisterBenchmarkRequest:
       properties:
         benchmark_id:
@@ -11963,41 +12057,6 @@ components:
       required:
       - reasoning_tokens
       title: OutputTokensDetails
-    RegisterDatasetRequestLoose:
-      properties:
-        purpose:
-          title: Purpose
-        source:
-          title: Source
-        metadata:
-          title: Metadata
-        dataset_id:
-          title: Dataset Id
-      type: object
-      required:
-      - purpose
-      - source
-      title: RegisterDatasetRequestLoose
-    RegisterScoringFunctionRequestLoose:
-      properties:
-        scoring_fn_id:
-          title: Scoring Fn Id
-        description:
-          title: Description
-        return_type:
-          title: Return Type
-        provider_scoring_fn_id:
-          title: Provider Scoring Fn Id
-        provider_id:
-          title: Provider Id
-        params:
-          title: Params
-      type: object
-      required:
-      - scoring_fn_id
-      - description
-      - return_type
-      title: RegisterScoringFunctionRequestLoose
     SearchRankingOptions:
       properties:
         ranker:
diff --git a/docs/static/deprecated-llama-stack-spec.yaml b/docs/static/deprecated-llama-stack-spec.yaml
index 3bc06d7d7..0bade1866 100644
--- a/docs/static/deprecated-llama-stack-spec.yaml
+++ b/docs/static/deprecated-llama-stack-spec.yaml
@@ -193,7 +193,7 @@ paths:
         content:
           application/json:
             schema:
-              $ref: '#/components/schemas/RegisterScoringFunctionRequestLoose'
+              $ref: '#/components/schemas/RegisterScoringFunctionRequest'
         required: true
       deprecated: true
   /v1/scoring-functions/{scoring_fn_id}:
@@ -549,7 +549,7 @@ paths:
         content:
           application/json:
             schema:
-              $ref: '#/components/schemas/RegisterDatasetRequestLoose'
+              $ref: '#/components/schemas/RegisterDatasetRequest'
         required: true
       deprecated: true
   /v1beta/datasets/{dataset_id}:
@@ -7429,6 +7429,14 @@ components:
       - scores
       title: EvaluateResponse
       description: The response from an evaluation.
+    RunEvalRequest:
+      properties:
+        benchmark_config:
+          $ref: '#/components/schemas/BenchmarkConfig'
+      type: object
+      required:
+      - benchmark_config
+      title: RunEvalRequest
     Job:
       properties:
         job_id:
@@ -8012,6 +8020,67 @@ components:
       - $ref: '#/components/schemas/CompletionInputType'
         title: CompletionInputType
       title: StringType | ... (9 variants)
+    RegisterScoringFunctionRequest:
+      properties:
+        scoring_fn_id:
+          type: string
+          title: Scoring Fn Id
+        description:
+          type: string
+          title: Description
+        return_type:
+          anyOf:
+          - $ref: '#/components/schemas/StringType'
+            title: StringType
+          - $ref: '#/components/schemas/NumberType'
+            title: NumberType
+          - $ref: '#/components/schemas/BooleanType'
+            title: BooleanType
+          - $ref: '#/components/schemas/ArrayType'
+            title: ArrayType
+          - $ref: '#/components/schemas/ObjectType'
+            title: ObjectType
+          - $ref: '#/components/schemas/JsonType'
+            title: JsonType
+          - $ref: '#/components/schemas/UnionType'
+            title: UnionType
+          - $ref: '#/components/schemas/ChatCompletionInputType'
+            title: ChatCompletionInputType
+          - $ref: '#/components/schemas/CompletionInputType'
+            title: CompletionInputType
+          title: StringType | ... (9 variants)
+        provider_scoring_fn_id:
+          anyOf:
+          - type: string
+          - type: 'null'
+        provider_id:
+          anyOf:
+          - type: string
+          - type: 'null'
+        params:
+          anyOf:
+          - oneOf:
+            - $ref: '#/components/schemas/LLMAsJudgeScoringFnParams'
+              title: LLMAsJudgeScoringFnParams
+            - $ref: '#/components/schemas/RegexParserScoringFnParams'
+              title: RegexParserScoringFnParams
+            - $ref: '#/components/schemas/BasicScoringFnParams'
+              title: BasicScoringFnParams
+            discriminator:
+              propertyName: type
+              mapping:
+                basic: '#/components/schemas/BasicScoringFnParams'
+                llm_as_judge: '#/components/schemas/LLMAsJudgeScoringFnParams'
+                regex_parser: '#/components/schemas/RegexParserScoringFnParams'
+            title: LLMAsJudgeScoringFnParams | RegexParserScoringFnParams | BasicScoringFnParams
+          - type: 'null'
+          title: Params
+      type: object
+      required:
+      - scoring_fn_id
+      - description
+      - return_type
+      title: RegisterScoringFunctionRequest
     RegisterShieldRequest:
       properties:
         shield_id:
@@ -8070,6 +8139,31 @@ components:
       - $ref: '#/components/schemas/RowsDataSource'
         title: RowsDataSource
       title: URIDataSource | RowsDataSource
+    RegisterDatasetRequest:
+      properties:
+        purpose:
+          $ref: '#/components/schemas/DatasetPurpose'
+        source:
+          anyOf:
+          - $ref: '#/components/schemas/URIDataSource'
+            title: URIDataSource
+          - $ref: '#/components/schemas/RowsDataSource'
+            title: RowsDataSource
+          title: URIDataSource | RowsDataSource
+        metadata:
+          anyOf:
+          - additionalProperties: true
+            type: object
+          - type: 'null'
+        dataset_id:
+          anyOf:
+          - type: string
+          - type: 'null'
+      type: object
+      required:
+      - purpose
+      - source
+      title: RegisterDatasetRequest
     RegisterBenchmarkRequest:
       properties:
         benchmark_id:
@@ -8806,41 +8900,6 @@ components:
       required:
       - reasoning_tokens
       title: OutputTokensDetails
-    RegisterDatasetRequestLoose:
-      properties:
-        purpose:
-          title: Purpose
-        source:
-          title: Source
-        metadata:
-          title: Metadata
-        dataset_id:
-          title: Dataset Id
-      type: object
-      required:
-      - purpose
-      - source
-      title: RegisterDatasetRequestLoose
-    RegisterScoringFunctionRequestLoose:
-      properties:
-        scoring_fn_id:
-          title: Scoring Fn Id
-        description:
-          title: Description
-        return_type:
-          title: Return Type
-        provider_scoring_fn_id:
-          title: Provider Scoring Fn Id
-        provider_id:
-          title: Provider Id
-        params:
-          title: Params
-      type: object
-      required:
-      - scoring_fn_id
-      - description
-      - return_type
-      title: RegisterScoringFunctionRequestLoose
     SearchRankingOptions:
       properties:
         ranker:
diff --git a/docs/static/experimental-llama-stack-spec.yaml b/docs/static/experimental-llama-stack-spec.yaml
index 2b36ebf47..4271989d6 100644
--- a/docs/static/experimental-llama-stack-spec.yaml
+++ b/docs/static/experimental-llama-stack-spec.yaml
@@ -300,7 +300,7 @@ paths:
         content:
           application/json:
             schema:
-              $ref: '#/components/schemas/BenchmarkConfig'
+              $ref: '#/components/schemas/RunEvalRequest'
         required: true
   /v1alpha/eval/benchmarks/{benchmark_id}/jobs/{job_id}:
     get:
@@ -6711,6 +6711,14 @@ components:
       - scores
       title: EvaluateResponse
       description: The response from an evaluation.
+    RunEvalRequest:
+      properties:
+        benchmark_config:
+          $ref: '#/components/schemas/BenchmarkConfig'
+      type: object
+      required:
+      - benchmark_config
+      title: RunEvalRequest
     Job:
       properties:
         job_id:
diff --git a/docs/static/stainless-llama-stack-spec.yaml b/docs/static/stainless-llama-stack-spec.yaml
index ff86e30e1..3a6735cbc 100644
--- a/docs/static/stainless-llama-stack-spec.yaml
+++ b/docs/static/stainless-llama-stack-spec.yaml
@@ -1810,7 +1810,7 @@ paths:
         content:
           application/json:
             schema:
-              $ref: '#/components/schemas/RegisterScoringFunctionRequestLoose'
+              $ref: '#/components/schemas/RegisterScoringFunctionRequest'
         required: true
       deprecated: true
   /v1/scoring-functions/{scoring_fn_id}:
@@ -3300,7 +3300,7 @@ paths:
         content:
           application/json:
             schema:
-              $ref: '#/components/schemas/RegisterDatasetRequestLoose'
+              $ref: '#/components/schemas/RegisterDatasetRequest'
         required: true
       deprecated: true
   /v1beta/datasets/{dataset_id}:
@@ -3557,7 +3557,7 @@ paths:
         content:
           application/json:
             schema:
-              $ref: '#/components/schemas/BenchmarkConfig'
+              $ref: '#/components/schemas/RunEvalRequest'
         required: true
   /v1alpha/eval/benchmarks/{benchmark_id}/jobs/{job_id}:
     get:
@@ -10586,6 +10586,14 @@ components:
       - scores
       title: EvaluateResponse
       description: The response from an evaluation.
+    RunEvalRequest:
+      properties:
+        benchmark_config:
+          $ref: '#/components/schemas/BenchmarkConfig'
+      type: object
+      required:
+      - benchmark_config
+      title: RunEvalRequest
     Job:
       properties:
         job_id:
@@ -11169,6 +11177,67 @@ components:
       - $ref: '#/components/schemas/CompletionInputType'
         title: CompletionInputType
       title: StringType | ... (9 variants)
+    RegisterScoringFunctionRequest:
+      properties:
+        scoring_fn_id:
+          type: string
+          title: Scoring Fn Id
+        description:
+          type: string
+          title: Description
+        return_type:
+          anyOf:
+          - $ref: '#/components/schemas/StringType'
+            title: StringType
+          - $ref: '#/components/schemas/NumberType'
+            title: NumberType
+          - $ref: '#/components/schemas/BooleanType'
+            title: BooleanType
+          - $ref: '#/components/schemas/ArrayType'
+            title: ArrayType
+          - $ref: '#/components/schemas/ObjectType'
+            title: ObjectType
+          - $ref: '#/components/schemas/JsonType'
+            title: JsonType
+          - $ref: '#/components/schemas/UnionType'
+            title: UnionType
+          - $ref: '#/components/schemas/ChatCompletionInputType'
+            title: ChatCompletionInputType
+          - $ref: '#/components/schemas/CompletionInputType'
+            title: CompletionInputType
+          title: StringType | ... (9 variants)
+        provider_scoring_fn_id:
+          anyOf:
+          - type: string
+          - type: 'null'
+        provider_id:
+          anyOf:
+          - type: string
+          - type: 'null'
+        params:
+          anyOf:
+          - oneOf:
+            - $ref: '#/components/schemas/LLMAsJudgeScoringFnParams'
+              title: LLMAsJudgeScoringFnParams
+            - $ref: '#/components/schemas/RegexParserScoringFnParams'
+              title: RegexParserScoringFnParams
+            - $ref: '#/components/schemas/BasicScoringFnParams'
+              title: BasicScoringFnParams
+            discriminator:
+              propertyName: type
+              mapping:
+                basic: '#/components/schemas/BasicScoringFnParams'
+                llm_as_judge: '#/components/schemas/LLMAsJudgeScoringFnParams'
+                regex_parser: '#/components/schemas/RegexParserScoringFnParams'
+            title: LLMAsJudgeScoringFnParams | RegexParserScoringFnParams | BasicScoringFnParams
+          - type: 'null'
+          title: Params
+      type: object
+      required:
+      - scoring_fn_id
+      - description
+      - return_type
+      title: RegisterScoringFunctionRequest
     RegisterShieldRequest:
       properties:
         shield_id:
@@ -11227,6 +11296,31 @@ components:
       - $ref: '#/components/schemas/RowsDataSource'
         title: RowsDataSource
       title: URIDataSource | RowsDataSource
+    RegisterDatasetRequest:
+      properties:
+        purpose:
+          $ref: '#/components/schemas/DatasetPurpose'
+        source:
+          anyOf:
+          - $ref: '#/components/schemas/URIDataSource'
+            title: URIDataSource
+          - $ref: '#/components/schemas/RowsDataSource'
+            title: RowsDataSource
+          title: URIDataSource | RowsDataSource
+        metadata:
+          anyOf:
+          - additionalProperties: true
+            type: object
+          - type: 'null'
+        dataset_id:
+          anyOf:
+          - type: string
+          - type: 'null'
+      type: object
+      required:
+      - purpose
+      - source
+      title: RegisterDatasetRequest
     RegisterBenchmarkRequest:
       properties:
         benchmark_id:
@@ -11963,41 +12057,6 @@ components:
       required:
       - reasoning_tokens
       title: OutputTokensDetails
-    RegisterDatasetRequestLoose:
-      properties:
-        purpose:
-          title: Purpose
-        source:
-          title: Source
-        metadata:
-          title: Metadata
-        dataset_id:
-          title: Dataset Id
-      type: object
-      required:
-      - purpose
-      - source
-      title: RegisterDatasetRequestLoose
-    RegisterScoringFunctionRequestLoose:
-      properties:
-        scoring_fn_id:
-          title: Scoring Fn Id
-        description:
-          title: Description
-        return_type:
-          title: Return Type
-        provider_scoring_fn_id:
-          title: Provider Scoring Fn Id
-        provider_id:
-          title: Provider Id
-        params:
-          title: Params
-      type: object
-      required:
-      - scoring_fn_id
-      - description
-      - return_type
-      title: RegisterScoringFunctionRequestLoose
     SearchRankingOptions:
       properties:
         ranker:
diff --git a/scripts/openapi_generator/endpoints.py b/scripts/openapi_generator/endpoints.py
index 39086f47f..85203cb71 100644
--- a/scripts/openapi_generator/endpoints.py
+++ b/scripts/openapi_generator/endpoints.py
@@ -15,6 +15,7 @@ import typing
 from typing import Annotated, Any, get_args, get_origin
 
 from fastapi import FastAPI
+from fastapi.params import Body as FastAPIBody
 from pydantic import Field, create_model
 
 from llama_stack.log import get_logger
@@ -26,6 +27,8 @@ from .state import _extra_body_fields, register_dynamic_model
 
 logger = get_logger(name=__name__, category="core")
 
+type QueryParameter = tuple[str, type, Any, bool]
+
 
 def _to_pascal_case(segment: str) -> str:
     tokens = re.findall(r"[A-Za-z]+|\d+", segment)
@@ -75,12 +78,12 @@ def _create_endpoint_with_request_model(
     return endpoint
 
 
-def _build_field_definitions(query_parameters: list[tuple[str, type, Any]], use_any: bool = False) -> dict[str, tuple]:
+def _build_field_definitions(query_parameters: list[QueryParameter], use_any: bool = False) -> dict[str, tuple]:
     """Build field definitions for a Pydantic model from query parameters."""
     from typing import Any
 
     field_definitions = {}
-    for param_name, param_type, default_value in query_parameters:
+    for param_name, param_type, default_value, _ in query_parameters:
         if use_any:
             field_definitions[param_name] = (Any, ... if default_value is inspect.Parameter.empty else default_value)
             continue
@@ -108,10 +111,10 @@ def _build_field_definitions(query_parameters: list[tuple[str, type, Any]], use_
             field_definitions[param_name] = (Any, ... if default_value is inspect.Parameter.empty else default_value)
 
     # Ensure all parameters are included
-    expected_params = {name for name, _, _ in query_parameters}
+    expected_params = {name for name, _, _, _ in query_parameters}
     missing = expected_params - set(field_definitions.keys())
     if missing:
-        for param_name, _, default_value in query_parameters:
+        for param_name, _, default_value, _ in query_parameters:
             if param_name in missing:
                 field_definitions[param_name] = (
                     Any,
@@ -126,7 +129,7 @@ def _create_dynamic_request_model(
     webmethod,
     method_name: str,
     http_method: str,
-    query_parameters: list[tuple[str, type, Any]],
+    query_parameters: list[QueryParameter],
     use_any: bool = False,
     variant_suffix: str | None = None,
 ) -> type | None:
@@ -143,12 +146,12 @@ def _create_dynamic_request_model(
 
 
 def _build_signature_params(
-    query_parameters: list[tuple[str, type, Any]],
+    query_parameters: list[QueryParameter],
 ) -> tuple[list[inspect.Parameter], dict[str, type]]:
     """Build signature parameters and annotations from query parameters."""
     signature_params = []
     param_annotations = {}
-    for param_name, param_type, default_value in query_parameters:
+    for param_name, param_type, default_value, _ in query_parameters:
         param_annotations[param_name] = param_type
         signature_params.append(
             inspect.Parameter(
@@ -219,6 +222,19 @@ def _is_extra_body_field(metadata_item: Any) -> bool:
     return isinstance(metadata_item, ExtraBodyField)
 
 
+def _should_embed_parameter(param_type: Any) -> bool:
+    """Determine whether a parameter should be embedded (wrapped) in the request body."""
+    if get_origin(param_type) is Annotated:
+        args = get_args(param_type)
+        metadata = args[1:] if len(args) > 1 else []
+        for metadata_item in metadata:
+            if isinstance(metadata_item, FastAPIBody):
+                # FastAPI treats embed=None as False, so default to False when unset.
+                return bool(metadata_item.embed)
+    # Unannotated parameters default to embed=True through create_dynamic_typed_route.
+    return True
+
+
 def _is_async_iterator_type(type_obj: Any) -> bool:
     """Check if a type is AsyncIterator or AsyncIterable."""
     from collections.abc import AsyncIterable, AsyncIterator
@@ -282,7 +298,7 @@ def _find_models_for_endpoint(
 
     Returns:
         tuple: (request_model, response_model, query_parameters, file_form_params, streaming_response_model, response_schema_name)
-        where query_parameters is a list of (name, type, default_value) tuples
+        where query_parameters is a list of (name, type, default_value, should_embed) tuples
         and file_form_params is a list of inspect.Parameter objects for File()/Form() params
         and streaming_response_model is the model for streaming responses (AsyncIterator content)
     """
@@ -299,7 +315,7 @@ def _find_models_for_endpoint(
 
         # Find request model and collect all body parameters
         request_model = None
-        query_parameters = []
+        query_parameters: list[QueryParameter] = []
         file_form_params = []
         path_params = set()
         extra_body_params = []
@@ -325,6 +341,7 @@ def _find_models_for_endpoint(
 
             # Check if it's a File() or Form() parameter - these need special handling
             param_type = param.annotation
+            param_should_embed = _should_embed_parameter(param_type)
             if _is_file_or_form_param(param_type):
                 # File() and Form() parameters must be in the function signature directly
                 # They cannot be part of a Pydantic model
@@ -350,30 +367,14 @@ def _find_models_for_endpoint(
                     # Store as extra body parameter - exclude from request model
                     extra_body_params.append((param_name, base_type, extra_body_description))
                     continue
+                param_type = base_type
 
             # Check if it's a Pydantic model (for POST/PUT requests)
             if hasattr(param_type, "model_json_schema"):
-                # Collect all body parameters including Pydantic models
-                # We'll decide later whether to use a single model or create a combined one
-                query_parameters.append((param_name, param_type, param.default))
-            elif get_origin(param_type) is Annotated:
-                # Handle Annotated types - get the base type
-                args = get_args(param_type)
-                if args and hasattr(args[0], "model_json_schema"):
-                    # Collect Pydantic models from Annotated types
-                    query_parameters.append((param_name, args[0], param.default))
-                else:
-                    # Regular annotated parameter (but not File/Form, already handled above)
-                    query_parameters.append((param_name, param_type, param.default))
+                query_parameters.append((param_name, param_type, param.default, param_should_embed))
             else:
-                # This is likely a body parameter for POST/PUT or query parameter for GET
-                # Store the parameter info for later use
-                # Preserve inspect.Parameter.empty to distinguish "no default" from "default=None"
-                default_value = param.default
-
-                # Extract the base type from union types (e.g., str | None -> str)
-                # Also make it safe for FastAPI to avoid forward reference issues
-                query_parameters.append((param_name, param_type, default_value))
+                # Regular annotated parameter (but not File/Form, already handled above)
+                query_parameters.append((param_name, param_type, param.default, param_should_embed))
 
         # Store extra body fields for later use in post-processing
         # We'll store them when the endpoint is created, as we need the full path
@@ -385,8 +386,8 @@ def _find_models_for_endpoint(
         # Otherwise, we'll create a combined request model from all parameters
         # BUT: For GET requests, never create a request body - all parameters should be query parameters
         if is_post_put and len(query_parameters) == 1:
-            param_name, param_type, default_value = query_parameters[0]
-            if hasattr(param_type, "model_json_schema"):
+            param_name, param_type, default_value, should_embed = query_parameters[0]
+            if hasattr(param_type, "model_json_schema") and not should_embed:
                 request_model = param_type
                 query_parameters = []  # Clear query_parameters so we use the single model
 
@@ -495,7 +496,7 @@ def _create_fastapi_endpoint(app: FastAPI, route, webmethod, api: Api):
     if file_form_params and is_post_put:
         signature_params = list(file_form_params)
         param_annotations = {param.name: param.annotation for param in file_form_params}
-        for param_name, param_type, default_value in query_parameters:
+        for param_name, param_type, default_value, _ in query_parameters:
             signature_params.append(
                 inspect.Parameter(
                     param_name,