diff --git a/backend/core/services/completion_runner.py b/backend/core/services/completion_runner.py
index 4b720d77..3718ca06 100644
--- a/backend/core/services/completion_runner.py
+++ b/backend/core/services/completion_runner.py
@@ -111,13 +111,19 @@ async def prepare(
         use_fallback: FallbackOption,
         completion_id: UUID,
         conversation_id: str | None,
+        stream: bool = False,
     ):
+        # Add stream information to metadata (only when True)
+        metadata_with_stream = {**metadata}
+        if stream:
+            metadata_with_stream["stream"] = True
+
         runner = Runner(
             tenant_slug=self._tenant.slug,
             custom_configs=self._tenant.providers,
             agent=agent,
             version=version,
-            metadata=metadata,
+            metadata=metadata_with_stream,
             metric_tags={},
             provider_factory=self._provider_factory,
             timeout=timeout or 240,
@@ -127,7 +133,7 @@ async def prepare(
             agent_input=input,
             start_time=start_time,
             completion_id=completion_id,
-            metadata=metadata,
+            metadata=metadata_with_stream,
             conversation_id=conversation_id,
         )
         return runner, builder
diff --git a/backend/core/storage/clickhouse/_models/_ch_completion.py b/backend/core/storage/clickhouse/_models/_ch_completion.py
index 0b68844d..9744e52f 100644
--- a/backend/core/storage/clickhouse/_models/_ch_completion.py
+++ b/backend/core/storage/clickhouse/_models/_ch_completion.py
@@ -129,6 +129,7 @@ class ClickhouseCompletion(BaseModel):
     # Origin of the run
     source: Literal["web", "api", "mcp"] = "api"
 
+
     # Traces as array of strings
     traces: list[_Trace] = Field(default_factory=list)
 
diff --git a/backend/protocol/api/_services/playground_service.py b/backend/protocol/api/_services/playground_service.py
index f14ebac5..b76e5067 100644
--- a/backend/protocol/api/_services/playground_service.py
+++ b/backend/protocol/api/_services/playground_service.py
@@ -191,6 +191,8 @@ async def _run_version(
         use_cache: CacheUsage | None,
     ) -> CompletionOutputTuple:
         _log.debug("Playground: Running single completion", version_id=version.id, input_id=input.id)
+        # Playground completions are never streamed, so no need to add stream metadata
+
         cached = await self._completion_runner.check_cache(
             completion_id=completion_id,
             agent=Agent(id=agent_id, uid=0),
@@ -217,6 +219,7 @@ async def _run_version(
                 use_fallback="never",
                 conversation_id=None,
                 completion_id=completion_id,
+                stream=False,
             )
             completion = await self._completion_runner.run(runner, builder)
 
diff --git a/backend/protocol/api/_services/run/run_service.py b/backend/protocol/api/_services/run/run_service.py
index 8f904efe..34a22eba 100644
--- a/backend/protocol/api/_services/run/run_service.py
+++ b/backend/protocol/api/_services/run/run_service.py
@@ -127,12 +127,17 @@ async def _cached_response(
         prepared_run: PreparedRun,
         deprecated_function: bool,
     ):
+        # Add stream metadata for cached completions (only when True)
+        metadata_with_stream = {**prepared_run.metadata}
+        if stream:
+            metadata_with_stream["stream"] = True
+
         cached = await self._completion_runner.check_cache(
             completion_id=completion_id,
             agent=Agent(id=prepared_run.agent_id, uid=0),
             version=prepared_run.version,
             input=prepared_run.agent_input,
-            metadata=prepared_run.metadata,
+            metadata=metadata_with_stream,
             use_cache=use_cache,
         )
         if not cached:
@@ -248,6 +253,7 @@ async def run(self, request: OpenAIProxyChatCompletionRequest, start_time: float
             use_fallback=use_fallback,
             conversation_id=request.conversation_id,
             completion_id=completion_id,
+            stream=stream,
         )
         if stream:
             return await self._stream(runner, builder, request)
diff --git a/web/src/app/completions/sections/table/cells/CompletionTableVersionCell.tsx b/web/src/app/completions/sections/table/cells/CompletionTableVersionCell.tsx
index 0f1ef924..2d2926e8 100644
--- a/web/src/app/completions/sections/table/cells/CompletionTableVersionCell.tsx
+++ b/web/src/app/completions/sections/table/cells/CompletionTableVersionCell.tsx
@@ -50,11 +50,6 @@ function CompletionTableVersionCell({ value }: CompletionTableVersionCellProps)
         });
       }
 
-      // Check stream (default: false)
-      if (obj.stream !== undefined && obj.stream !== false) {
-        nonDefaultEntries.push({ key: "stream", value: String(obj.stream) });
-      }
-
       // Check include_usage (default: false)
       if (obj.include_usage !== undefined && obj.include_usage !== false) {
         nonDefaultEntries.push({
diff --git a/web/src/components/utils/utils.ts b/web/src/components/utils/utils.ts
index a902c6c9..573f2dbb 100644
--- a/web/src/components/utils/utils.ts
+++ b/web/src/components/utils/utils.ts
@@ -451,7 +451,6 @@ export function getVersionWithDefaults(version: Version): ExtendedVersion {
     tools: version.tools !== undefined ? version.tools : [],
     use_cache: extendedVersion.use_cache !== undefined ? extendedVersion.use_cache : "auto",
     max_tokens: extendedVersion.max_tokens !== undefined ? extendedVersion.max_tokens : "unlimited",
-    stream: extendedVersion.stream !== undefined ? extendedVersion.stream : false,
     include_usage: extendedVersion.include_usage !== undefined ? extendedVersion.include_usage : false,
     presence_penalty: extendedVersion.presence_penalty !== undefined ? extendedVersion.presence_penalty : 0,
     frequency_penalty: extendedVersion.frequency_penalty !== undefined ? extendedVersion.frequency_penalty : 0,
diff --git a/web/src/components/version-details/VersionDetailsView.tsx b/web/src/components/version-details/VersionDetailsView.tsx
index 6654284d..5b513f14 100644
--- a/web/src/components/version-details/VersionDetailsView.tsx
+++ b/web/src/components/version-details/VersionDetailsView.tsx
@@ -33,7 +33,6 @@ export function VersionDetailsView({
       "tools",
       "use_cache",
       "max_tokens",
-      "stream",
       "include_usage",
       "presence_penalty",
       "frequency_penalty",
@@ -122,12 +121,6 @@ export function VersionDetailsView({
               <span className="text-xs text-gray-900 ">{extendedVersion.max_tokens}</span>
             </div>
 
-            {/* Stream */}
-            <div className="flex justify-between items-center">
-              <span className="text-xs text-gray-600">Stream</span>
-              <span className="text-xs text-gray-900 ">{extendedVersion.stream ? "true" : "false"}</span>
-            </div>
-
             {/* Include Usage */}
             <div className="flex justify-between items-center">
               <span className="text-xs text-gray-600">Include Usage</span>
diff --git a/web/src/types/models.ts b/web/src/types/models.ts
index cbd6698c..2a381d25 100644
--- a/web/src/types/models.ts
+++ b/web/src/types/models.ts
@@ -122,7 +122,6 @@ export interface Version {
 export interface ExtendedVersion extends Version {
   use_cache?: string | boolean;
   max_tokens?: number | string;
-  stream?: boolean;
   include_usage?: boolean;
   presence_penalty?: number;
   frequency_penalty?: number;