fix: model flag in non interactive mode (#2249)

packages/opencode/src/cli/cmd/run.ts

@@ -171,12 +171,8 @@ export const RunCommand = cmd({
       const result = await Session.chat({
         sessionID: session.id,
         messageID,
-        ...(agent.model
-          ? agent.model
-          : {
-              providerID,
-              modelID,
-            }),
+        providerID,
+        modelID,
         agent: agent.name,
         parts: [
           {