diff --git a/docs/_static/llama-stack-spec.html b/docs/_static/llama-stack-spec.html
index c35da8d55..4c5393947 100644
--- a/docs/_static/llama-stack-spec.html
+++ b/docs/_static/llama-stack-spec.html
@@ -4191,31 +4191,6 @@
                             "type": "string"
                         },
                         "description": "Up to 4 sequences where the API will stop generating further tokens. The returned text will not contain the stop sequence."
-                    },
-                    "additional_params": {
-                        "type": "object",
-                        "additionalProperties": {
-                            "oneOf": [
-                                {
-                                    "type": "null"
-                                },
-                                {
-                                    "type": "boolean"
-                                },
-                                {
-                                    "type": "number"
-                                },
-                                {
-                                    "type": "string"
-                                },
-                                {
-                                    "type": "array"
-                                },
-                                {
-                                    "type": "object"
-                                }
-                            ]
-                        }
                     }
                 },
                 "additionalProperties": false,
diff --git a/docs/_static/llama-stack-spec.yaml b/docs/_static/llama-stack-spec.yaml
index 591a296d0..a24f1a9db 100644
--- a/docs/_static/llama-stack-spec.yaml
+++ b/docs/_static/llama-stack-spec.yaml
@@ -2907,16 +2907,6 @@ components:
           description: >-
             Up to 4 sequences where the API will stop generating further tokens. The
             returned text will not contain the stop sequence.
-        additional_params:
-          type: object
-          additionalProperties:
-            oneOf:
-              - type: 'null'
-              - type: boolean
-              - type: number
-              - type: string
-              - type: array
-              - type: object
       additionalProperties: false
       required:
         - strategy
diff --git a/llama_stack/apis/inference/inference.py b/llama_stack/apis/inference/inference.py
index b91169fbb..309171f20 100644
--- a/llama_stack/apis/inference/inference.py
+++ b/llama_stack/apis/inference/inference.py
@@ -82,7 +82,6 @@ class SamplingParams(BaseModel):
     max_tokens: Optional[int] = 0
     repetition_penalty: Optional[float] = 1.0
     stop: Optional[List[str]] = None
-    additional_params: Optional[Dict[str, Any]] = {}
 
 
 class LogProbConfig(BaseModel):
diff --git a/llama_stack/providers/remote/inference/watsonx/watsonx.py b/llama_stack/providers/remote/inference/watsonx/watsonx.py
index 63484c888..9feeba932 100644
--- a/llama_stack/providers/remote/inference/watsonx/watsonx.py
+++ b/llama_stack/providers/remote/inference/watsonx/watsonx.py
@@ -34,6 +34,9 @@ from llama_stack.apis.inference.inference import (
     OpenAICompletion,
     OpenAIMessageParam,
     OpenAIResponseFormatParam,
+    GreedySamplingStrategy,
+    TopKSamplingStrategy,
+    TopPSamplingStrategy,
 )
 from llama_stack.providers.utils.inference.model_registry import ModelRegistryHelper
 from llama_stack.providers.utils.inference.openai_compat import (
@@ -230,36 +233,16 @@ class WatsonXInferenceAdapter(Inference, ModelRegistryHelper):
                 input_dict["params"][GenParams.MAX_NEW_TOKENS] = request.sampling_params.max_tokens
             if request.sampling_params.repetition_penalty:
                 input_dict["params"][GenParams.REPETITION_PENALTY] = request.sampling_params.repetition_penalty
-            if request.sampling_params.additional_params.get("top_p"):
-                input_dict["params"][GenParams.TOP_P] = request.sampling_params.additional_params["top_p"]
-            if request.sampling_params.additional_params.get("top_k"):
-                input_dict["params"][GenParams.TOP_K] = request.sampling_params.additional_params["top_k"]
-            if request.sampling_params.additional_params.get("temperature"):
-                input_dict["params"][GenParams.TEMPERATURE] = request.sampling_params.additional_params["temperature"]
-            if request.sampling_params.additional_params.get("length_penalty"):
-                input_dict["params"][GenParams.LENGTH_PENALTY] = request.sampling_params.additional_params[
-                    "length_penalty"
-                ]
-            if request.sampling_params.additional_params.get("random_seed"):
-                input_dict["params"][GenParams.RANDOM_SEED] = request.sampling_params.additional_params["random_seed"]
-            if request.sampling_params.additional_params.get("min_new_tokens"):
-                input_dict["params"][GenParams.MIN_NEW_TOKENS] = request.sampling_params.additional_params[
-                    "min_new_tokens"
-                ]
-            if request.sampling_params.additional_params.get("stop_sequences"):
-                input_dict["params"][GenParams.STOP_SEQUENCES] = request.sampling_params.additional_params[
-                    "stop_sequences"
-                ]
-            if request.sampling_params.additional_params.get("time_limit"):
-                input_dict["params"][GenParams.TIME_LIMIT] = request.sampling_params.additional_params["time_limit"]
-            if request.sampling_params.additional_params.get("truncate_input_tokens"):
-                input_dict["params"][GenParams.TRUNCATE_INPUT_TOKENS] = request.sampling_params.additional_params[
-                    "truncate_input_tokens"
-                ]
-            if request.sampling_params.additional_params.get("return_options"):
-                input_dict["params"][GenParams.RETURN_OPTIONS] = request.sampling_params.additional_params[
-                    "return_options"
-                ]
+
+            if isinstance(request.sampling_params.strategy, TopPSamplingStrategy):
+                input_dict["top_p"] = request.sampling_params.strategy.top_p
+                input_dict["temperature"] = request.sampling_params.strategy.temperature
+            if isinstance(request.sampling_params.strategy, TopKSamplingStrategy):
+                input_dict["extra_body"]["top_k"] = request.sampling_params.strategy.top_k
+            if isinstance(request.sampling_params.strategy, GreedySamplingStrategy):
+                input_dict["temperature"] = 1.0
+            
+        input_dict["params"][GenParams.STOP_SEQUENCES] =  ["<|endoftext|>"]
 
         params = {
             **input_dict,