diff --git a/litellm/llms/cerebras/chat.py b/litellm/llms/cerebras/chat.py
index 4e9c6811a77..9929e2ab9a2 100644
--- a/litellm/llms/cerebras/chat.py
+++ b/litellm/llms/cerebras/chat.py
@@ -7,6 +7,7 @@ this is OpenAI compatible - no translation needed / occurs
 from typing import Optional
 
 from litellm.llms.openai.chat.gpt_transformation import OpenAIGPTConfig
+from litellm.utils import supports_reasoning
 
 
 class CerebrasConfig(OpenAIGPTConfig):
@@ -24,6 +25,7 @@ class CerebrasConfig(OpenAIGPTConfig):
     tool_choice: Optional[str] = None
     tools: Optional[list] = None
     user: Optional[str] = None
+    reasoning_effort: Optional[str] = None
 
     def __init__(
         self,
@@ -37,6 +39,7 @@ class CerebrasConfig(OpenAIGPTConfig):
         tool_choice: Optional[str] = None,
         tools: Optional[list] = None,
         user: Optional[str] = None,
+        reasoning_effort: Optional[str] = None,
     ) -> None:
         locals_ = locals().copy()
         for key, value in locals_.items():
@@ -53,7 +56,7 @@ class CerebrasConfig(OpenAIGPTConfig):
 
         """
 
-        return [
+        supported_params = [
             "max_tokens",
             "max_completion_tokens",
             "response_format",
@@ -67,6 +70,12 @@ class CerebrasConfig(OpenAIGPTConfig):
             "user",
         ]
 
+        # Only add reasoning_effort for models that support it
+        if supports_reasoning(model=model, custom_llm_provider="cerebras"):
+            supported_params.append("reasoning_effort")
+
+        return supported_params
+
     def map_openai_params(
         self,
         non_default_params: dict,
diff --git a/litellm/model_prices_and_context_window_backup.json b/litellm/model_prices_and_context_window_backup.json
index 0f84bba941d..f0674a6a169 100644
--- a/litellm/model_prices_and_context_window_backup.json
+++ b/litellm/model_prices_and_context_window_backup.json
@@ -6715,13 +6715,13 @@
         "supports_tool_choice": true
     },
     "cerebras/gpt-oss-120b": {
-        "input_cost_per_token": 2.5e-07,
+        "input_cost_per_token": 3.5e-07,
         "litellm_provider": "cerebras",
         "max_input_tokens": 131072,
         "max_output_tokens": 32768,
         "max_tokens": 32768,
         "mode": "chat",
-        "output_cost_per_token": 6.9e-07,
+        "output_cost_per_token": 7.5e-07,
         "source": "https://www.cerebras.ai/blog/openai-gpt-oss-120b-runs-fastest-on-cerebras",
         "supports_function_calling": true,
         "supports_parallel_function_calling": true,
@@ -6739,6 +6739,7 @@
         "output_cost_per_token": 8e-07,
         "source": "https://inference-docs.cerebras.ai/support/pricing",
         "supports_function_calling": true,
+        "supports_reasoning": true,
         "supports_tool_choice": true
     },
     "cerebras/zai-glm-4.6": {
diff --git a/model_prices_and_context_window.json b/model_prices_and_context_window.json
index 6acf24b050b..2576903ffe9 100644
--- a/model_prices_and_context_window.json
+++ b/model_prices_and_context_window.json
@@ -6729,13 +6729,13 @@
         "supports_tool_choice": true
     },
     "cerebras/gpt-oss-120b": {
-        "input_cost_per_token": 2.5e-07,
+        "input_cost_per_token": 3.5e-07,
         "litellm_provider": "cerebras",
         "max_input_tokens": 131072,
         "max_output_tokens": 32768,
         "max_tokens": 32768,
         "mode": "chat",
-        "output_cost_per_token": 6.9e-07,
+        "output_cost_per_token": 7.5e-07,
         "source": "https://www.cerebras.ai/blog/openai-gpt-oss-120b-runs-fastest-on-cerebras",
         "supports_function_calling": true,
         "supports_parallel_function_calling": true,
@@ -6753,6 +6753,7 @@
         "output_cost_per_token": 8e-07,
         "source": "https://inference-docs.cerebras.ai/support/pricing",
         "supports_function_calling": true,
+        "supports_reasoning": true,
         "supports_tool_choice": true
     },
     "cerebras/zai-glm-4.6": {