diff --git a/auto-claude-ui/src/main/insights-service.ts b/auto-claude-ui/src/main/insights-service.ts
index 3a76d00d..59fe3cb2 100644
--- a/auto-claude-ui/src/main/insights-service.ts
+++ b/auto-claude-ui/src/main/insights-service.ts
@@ -2,7 +2,8 @@ import { EventEmitter } from 'events';
 import type {
   InsightsSession,
   InsightsSessionSummary,
-  InsightsChatMessage
+  InsightsChatMessage,
+  InsightsModelConfig
 } from '../shared/types';
 import { InsightsConfig } from './insights/config';
 import { InsightsPaths } from './insights/paths';
@@ -111,7 +112,12 @@ export class InsightsService extends EventEmitter {
   /**
    * Send a message and get AI response
    */
-  async sendMessage(projectId: string, projectPath: string, message: string): Promise<void> {
+  async sendMessage(
+    projectId: string,
+    projectPath: string,
+    message: string,
+    modelConfig?: InsightsModelConfig
+  ): Promise<void> {
     // Cancel any existing session
     this.executor.cancelSession(projectId);
 
@@ -150,13 +156,17 @@ export class InsightsService extends EventEmitter {
       content: m.content
     }));
 
+    // Use provided modelConfig or fall back to session's config
+    const configToUse = modelConfig || session.modelConfig;
+
     try {
       // Execute insights query
       const result = await this.executor.execute(
         projectId,
         projectPath,
         message,
-        conversationHistory
+        conversationHistory,
+        configToUse
       );
 
       // Add assistant message to session
@@ -177,6 +187,13 @@ export class InsightsService extends EventEmitter {
       console.error('[InsightsService] Error executing insights:', error);
     }
   }
+
+  /**
+   * Update model configuration for a session
+   */
+  updateSessionModelConfig(projectPath: string, sessionId: string, modelConfig: InsightsModelConfig): boolean {
+    return this.sessionManager.updateSessionModelConfig(projectPath, sessionId, modelConfig);
+  }
 }
 
 // Singleton instance
diff --git a/auto-claude-ui/src/main/insights/insights-executor.ts b/auto-claude-ui/src/main/insights/insights-executor.ts
index cf45fa90..ec0c01bf 100644
--- a/auto-claude-ui/src/main/insights/insights-executor.ts
+++ b/auto-claude-ui/src/main/insights/insights-executor.ts
@@ -6,8 +6,10 @@ import type {
   InsightsChatMessage,
   InsightsChatStatus,
   InsightsStreamChunk,
-  InsightsToolUsage
+  InsightsToolUsage,
+  InsightsModelConfig
 } from '../../shared/types';
+import { MODEL_ID_MAP } from '../../shared/constants';
 import { InsightsConfig } from './config';
 import { detectRateLimit, createSDKRateLimitInfo } from '../rate-limit-detector';
 
@@ -59,7 +61,8 @@ export class InsightsExecutor extends EventEmitter {
     projectId: string,
     projectPath: string,
     message: string,
-    conversationHistory: Array<{ role: string; content: string }>
+    conversationHistory: Array<{ role: string; content: string }>,
+    modelConfig?: InsightsModelConfig
   ): Promise<ProcessorResult> {
     // Cancel any existing session
     this.cancelSession(projectId);
@@ -69,7 +72,7 @@ export class InsightsExecutor extends EventEmitter {
       throw new Error('Auto Claude source not found');
     }
 
-    const runnerPath = path.join(autoBuildSource, 'insights_runner.py');
+    const runnerPath = path.join(autoBuildSource, 'runners', 'insights_runner.py');
     if (!existsSync(runnerPath)) {
       throw new Error('insights_runner.py not found in auto-claude directory');
     }
@@ -83,13 +86,23 @@ export class InsightsExecutor extends EventEmitter {
     // Get process environment
     const processEnv = this.config.getProcessEnv();
 
-    // Spawn Python process
-    const proc = spawn(this.config.getPythonPath(), [
+    // Build command arguments
+    const args = [
       runnerPath,
       '--project-dir', projectPath,
       '--message', message,
       '--history', JSON.stringify(conversationHistory)
-    ], {
+    ];
+
+    // Add model config if provided
+    if (modelConfig) {
+      const modelId = MODEL_ID_MAP[modelConfig.model] || MODEL_ID_MAP['sonnet'];
+      args.push('--model', modelId);
+      args.push('--thinking-level', modelConfig.thinkingLevel);
+    }
+
+    // Spawn Python process
+    const proc = spawn(this.config.getPythonPath(), args, {
       cwd: autoBuildSource,
       env: processEnv
     });
diff --git a/auto-claude-ui/src/main/insights/session-manager.ts b/auto-claude-ui/src/main/insights/session-manager.ts
index 7be98682..7293d527 100644
--- a/auto-claude-ui/src/main/insights/session-manager.ts
+++ b/auto-claude-ui/src/main/insights/session-manager.ts
@@ -1,4 +1,4 @@
-import type { InsightsSession, InsightsSessionSummary } from '../../shared/types';
+import type { InsightsSession, InsightsSessionSummary, InsightsModelConfig } from '../../shared/types';
 import { SessionStorage } from './session-storage';
 import { InsightsPaths } from './paths';
 
@@ -119,6 +119,30 @@ export class SessionManager {
     return true;
   }
 
+  /**
+   * Update model configuration for a session
+   */
+  updateSessionModelConfig(projectPath: string, sessionId: string, modelConfig: InsightsModelConfig): boolean {
+    const session = this.storage.loadSessionById(projectPath, sessionId);
+    if (!session) return false;
+
+    session.modelConfig = modelConfig;
+    session.updatedAt = new Date();
+    this.storage.saveSession(projectPath, session);
+
+    // Update cache if this session is cached
+    for (const [projectId, cachedSession] of this.sessions) {
+      if (cachedSession.id === sessionId) {
+        cachedSession.modelConfig = modelConfig;
+        cachedSession.updatedAt = new Date();
+        this.sessions.set(projectId, cachedSession);
+        break;
+      }
+    }
+
+    return true;
+  }
+
   /**
    * Save session to disk and update cache
    */
diff --git a/auto-claude-ui/src/main/ipc-handlers/insights-handlers.ts b/auto-claude-ui/src/main/ipc-handlers/insights-handlers.ts
index 8db91bc3..cef96a6d 100644
--- a/auto-claude-ui/src/main/ipc-handlers/insights-handlers.ts
+++ b/auto-claude-ui/src/main/ipc-handlers/insights-handlers.ts
@@ -3,7 +3,7 @@ import type { BrowserWindow } from 'electron';
 import path from 'path';
 import { existsSync, readdirSync, mkdirSync, writeFileSync } from 'fs';
 import { IPC_CHANNELS, getSpecsDir, AUTO_BUILD_PATHS } from '../../shared/constants';
-import type { IPCResult, InsightsSession, InsightsSessionSummary, Task, TaskMetadata } from '../../shared/types';
+import type { IPCResult, InsightsSession, InsightsSessionSummary, InsightsModelConfig, Task, TaskMetadata } from '../../shared/types';
 import { projectStore } from '../project-store';
 import { insightsService } from '../insights-service';
 
@@ -32,7 +32,7 @@ export function registerInsightsHandlers(
 
   ipcMain.on(
     IPC_CHANNELS.INSIGHTS_SEND_MESSAGE,
-    async (_, projectId: string, message: string) => {
+    async (_, projectId: string, message: string, modelConfig?: InsightsModelConfig) => {
       const project = projectStore.getProject(projectId);
       if (!project) {
         const mainWindow = getMainWindow();
@@ -44,7 +44,7 @@ export function registerInsightsHandlers(
 
       // Note: Python environment initialization should be handled by insightsService
       // or added here with proper dependency injection if needed
-      insightsService.sendMessage(projectId, project.path, message);
+      insightsService.sendMessage(projectId, project.path, message, modelConfig);
     }
   );
 
@@ -241,4 +241,57 @@ export function registerInsightsHandlers(
     }
   );
 
+  // Update model configuration for a session
+  ipcMain.handle(
+    IPC_CHANNELS.INSIGHTS_UPDATE_MODEL_CONFIG,
+    async (_, projectId: string, sessionId: string, modelConfig: InsightsModelConfig): Promise<IPCResult> => {
+      const project = projectStore.getProject(projectId);
+      if (!project) {
+        return { success: false, error: 'Project not found' };
+      }
+
+      const success = insightsService.updateSessionModelConfig(project.path, sessionId, modelConfig);
+      if (success) {
+        return { success: true };
+      }
+      return { success: false, error: 'Failed to update model configuration' };
+    }
+  );
+
+  // ============================================
+  // Insights Event Forwarding (Service -> Renderer)
+  // ============================================
+
+  // Forward streaming chunks to renderer
+  insightsService.on('stream-chunk', (projectId: string, chunk: unknown) => {
+    const mainWindow = getMainWindow();
+    if (mainWindow) {
+      mainWindow.webContents.send(IPC_CHANNELS.INSIGHTS_STREAM_CHUNK, projectId, chunk);
+    }
+  });
+
+  // Forward status updates to renderer
+  insightsService.on('status', (projectId: string, status: unknown) => {
+    const mainWindow = getMainWindow();
+    if (mainWindow) {
+      mainWindow.webContents.send(IPC_CHANNELS.INSIGHTS_STATUS, projectId, status);
+    }
+  });
+
+  // Forward errors to renderer
+  insightsService.on('error', (projectId: string, error: string) => {
+    const mainWindow = getMainWindow();
+    if (mainWindow) {
+      mainWindow.webContents.send(IPC_CHANNELS.INSIGHTS_ERROR, projectId, error);
+    }
+  });
+
+  // Forward SDK rate limit events to renderer
+  insightsService.on('sdk-rate-limit', (rateLimitInfo: unknown) => {
+    const mainWindow = getMainWindow();
+    if (mainWindow) {
+      mainWindow.webContents.send(IPC_CHANNELS.CLAUDE_SDK_RATE_LIMIT, rateLimitInfo);
+    }
+  });
+
 }
diff --git a/auto-claude-ui/src/preload/api/modules/insights-api.ts b/auto-claude-ui/src/preload/api/modules/insights-api.ts
index a058b4c6..0dc258f8 100644
--- a/auto-claude-ui/src/preload/api/modules/insights-api.ts
+++ b/auto-claude-ui/src/preload/api/modules/insights-api.ts
@@ -4,6 +4,7 @@ import type {
   InsightsSessionSummary,
   InsightsChatStatus,
   InsightsStreamChunk,
+  InsightsModelConfig,
   Task,
   TaskMetadata,
   IPCResult
@@ -16,7 +17,7 @@ import { createIpcListener, invokeIpc, sendIpc, IpcListenerCleanup } from './ipc
 export interface InsightsAPI {
   // Operations
   getInsightsSession: (projectId: string) => Promise<IPCResult<InsightsSession | null>>;
-  sendInsightsMessage: (projectId: string, message: string) => void;
+  sendInsightsMessage: (projectId: string, message: string, modelConfig?: InsightsModelConfig) => void;
   clearInsightsSession: (projectId: string) => Promise<IPCResult>;
   createTaskFromInsights: (
     projectId: string,
@@ -29,6 +30,7 @@ export interface InsightsAPI {
   switchInsightsSession: (projectId: string, sessionId: string) => Promise<IPCResult<InsightsSession | null>>;
   deleteInsightsSession: (projectId: string, sessionId: string) => Promise<IPCResult>;
   renameInsightsSession: (projectId: string, sessionId: string, newTitle: string) => Promise<IPCResult>;
+  updateInsightsModelConfig: (projectId: string, sessionId: string, modelConfig: InsightsModelConfig) => Promise<IPCResult>;
 
   // Event Listeners
   onInsightsStreamChunk: (
@@ -50,8 +52,8 @@ export const createInsightsAPI = (): InsightsAPI => ({
   getInsightsSession: (projectId: string): Promise<IPCResult<InsightsSession | null>> =>
     invokeIpc(IPC_CHANNELS.INSIGHTS_GET_SESSION, projectId),
 
-  sendInsightsMessage: (projectId: string, message: string): void =>
-    sendIpc(IPC_CHANNELS.INSIGHTS_SEND_MESSAGE, projectId, message),
+  sendInsightsMessage: (projectId: string, message: string, modelConfig?: InsightsModelConfig): void =>
+    sendIpc(IPC_CHANNELS.INSIGHTS_SEND_MESSAGE, projectId, message, modelConfig),
 
   clearInsightsSession: (projectId: string): Promise<IPCResult> =>
     invokeIpc(IPC_CHANNELS.INSIGHTS_CLEAR_SESSION, projectId),
@@ -79,6 +81,9 @@ export const createInsightsAPI = (): InsightsAPI => ({
   renameInsightsSession: (projectId: string, sessionId: string, newTitle: string): Promise<IPCResult> =>
     invokeIpc(IPC_CHANNELS.INSIGHTS_RENAME_SESSION, projectId, sessionId, newTitle),
 
+  updateInsightsModelConfig: (projectId: string, sessionId: string, modelConfig: InsightsModelConfig): Promise<IPCResult> =>
+    invokeIpc(IPC_CHANNELS.INSIGHTS_UPDATE_MODEL_CONFIG, projectId, sessionId, modelConfig),
+
   // Event Listeners
   onInsightsStreamChunk: (
     callback: (projectId: string, chunk: InsightsStreamChunk) => void
diff --git a/auto-claude-ui/src/renderer/components/CustomModelModal.tsx b/auto-claude-ui/src/renderer/components/CustomModelModal.tsx
new file mode 100644
index 00000000..8e6d0072
--- /dev/null
+++ b/auto-claude-ui/src/renderer/components/CustomModelModal.tsx
@@ -0,0 +1,105 @@
+import { useState } from 'react';
+import {
+  Dialog,
+  DialogContent,
+  DialogHeader,
+  DialogTitle,
+  DialogFooter,
+  DialogDescription
+} from './ui/dialog';
+import { Button } from './ui/button';
+import { Label } from './ui/label';
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue
+} from './ui/select';
+import { AVAILABLE_MODELS, THINKING_LEVELS } from '../../shared/constants';
+import type { InsightsModelConfig } from '../../shared/types';
+import type { ModelType, ThinkingLevel } from '../../shared/types';
+
+interface CustomModelModalProps {
+  currentConfig?: InsightsModelConfig;
+  onSave: (config: InsightsModelConfig) => void;
+  onClose: () => void;
+}
+
+export function CustomModelModal({ currentConfig, onSave, onClose }: CustomModelModalProps) {
+  const [model, setModel] = useState<ModelType>(
+    currentConfig?.model || 'sonnet'
+  );
+  const [thinkingLevel, setThinkingLevel] = useState<ThinkingLevel>(
+    currentConfig?.thinkingLevel || 'medium'
+  );
+
+  const handleSave = () => {
+    onSave({
+      profileId: 'custom',
+      model,
+      thinkingLevel
+    });
+  };
+
+  return (
+    <Dialog open onOpenChange={onClose}>
+      <DialogContent className="sm:max-w-md">
+        <DialogHeader>
+          <DialogTitle>Custom Model Configuration</DialogTitle>
+          <DialogDescription>
+            Configure the model and thinking level for this chat session.
+          </DialogDescription>
+        </DialogHeader>
+
+        <div className="space-y-4 py-4">
+          <div className="space-y-2">
+            <Label htmlFor="model-select">Model</Label>
+            <Select value={model} onValueChange={(v) => setModel(v as ModelType)}>
+              <SelectTrigger id="model-select">
+                <SelectValue />
+              </SelectTrigger>
+              <SelectContent>
+                {AVAILABLE_MODELS.map((m) => (
+                  <SelectItem key={m.value} value={m.value}>
+                    {m.label}
+                  </SelectItem>
+                ))}
+              </SelectContent>
+            </Select>
+          </div>
+
+          <div className="space-y-2">
+            <Label htmlFor="thinking-select">Thinking Level</Label>
+            <Select value={thinkingLevel} onValueChange={(v) => setThinkingLevel(v as ThinkingLevel)}>
+              <SelectTrigger id="thinking-select">
+                <SelectValue />
+              </SelectTrigger>
+              <SelectContent>
+                {THINKING_LEVELS.map((level) => (
+                  <SelectItem key={level.value} value={level.value}>
+                    <div className="flex items-center gap-2">
+                      <span className="font-medium">{level.label}</span>
+                      <span className="text-xs text-muted-foreground">
+                        {level.description}
+                      </span>
+                    </div>
+                  </SelectItem>
+                ))}
+              </SelectContent>
+            </Select>
+          </div>
+        </div>
+
+        <DialogFooter>
+          <Button variant="outline" onClick={onClose}>
+            Cancel
+          </Button>
+          <Button onClick={handleSave}>
+            Apply
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}
diff --git a/auto-claude-ui/src/renderer/components/Insights.tsx b/auto-claude-ui/src/renderer/components/Insights.tsx
index d410812b..9ed75b31 100644
--- a/auto-claude-ui/src/renderer/components/Insights.tsx
+++ b/auto-claude-ui/src/renderer/components/Insights.tsx
@@ -29,12 +29,14 @@ import {
   switchSession,
   deleteSession,
   renameSession,
+  updateModelConfig,
   createTaskFromSuggestion,
   setupInsightsListeners
 } from '../stores/insights-store';
 import { loadTasks } from '../stores/task-store';
 import { ChatHistorySidebar } from './ChatHistorySidebar';
-import type { InsightsChatMessage } from '../../shared/types';
+import { InsightsModelSelector } from './InsightsModelSelector';
+import type { InsightsChatMessage, InsightsModelConfig } from '../../shared/types';
 import {
   TASK_CATEGORY_LABELS,
   TASK_CATEGORY_COLORS,
@@ -141,6 +143,13 @@ export function Insights({ projectId }: InsightsProps) {
     }
   };
 
+  const handleModelConfigChange = async (config: InsightsModelConfig) => {
+    // If we have a session, persist the config
+    if (session?.id) {
+      await updateModelConfig(projectId, session.id, config);
+    }
+  };
+
   const isLoading = status.phase === 'thinking' || status.phase === 'streaming';
   const messages = session?.messages || [];
 
@@ -187,14 +196,21 @@ export function Insights({ projectId }: InsightsProps) {
               </p>
             </div>
           </div>
-          <Button
-            variant="outline"
-            size="sm"
-            onClick={handleNewSession}
-          >
-            <Plus className="mr-2 h-4 w-4" />
-            New Chat
-          </Button>
+          <div className="flex items-center gap-2">
+            <InsightsModelSelector
+              currentConfig={session?.modelConfig}
+              onConfigChange={handleModelConfigChange}
+              disabled={isLoading}
+            />
+            <Button
+              variant="outline"
+              size="sm"
+              onClick={handleNewSession}
+            >
+              <Plus className="mr-2 h-4 w-4" />
+              New Chat
+            </Button>
+          </div>
         </div>
 
       {/* Messages */}
diff --git a/auto-claude-ui/src/renderer/components/InsightsModelSelector.tsx b/auto-claude-ui/src/renderer/components/InsightsModelSelector.tsx
new file mode 100644
index 00000000..12bcf76a
--- /dev/null
+++ b/auto-claude-ui/src/renderer/components/InsightsModelSelector.tsx
@@ -0,0 +1,144 @@
+import { useState } from 'react';
+import { Brain, Scale, Zap, Sliders, Check } from 'lucide-react';
+import { Button } from './ui/button';
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+  DropdownMenuLabel
+} from './ui/dropdown-menu';
+import { DEFAULT_AGENT_PROFILES, AVAILABLE_MODELS } from '../../shared/constants';
+import type { InsightsModelConfig } from '../../shared/types';
+import { CustomModelModal } from './CustomModelModal';
+
+interface InsightsModelSelectorProps {
+  currentConfig?: InsightsModelConfig;
+  onConfigChange: (config: InsightsModelConfig) => void;
+  disabled?: boolean;
+}
+
+const iconMap: Record<string, React.ElementType> = {
+  Brain,
+  Scale,
+  Zap
+};
+
+export function InsightsModelSelector({
+  currentConfig,
+  onConfigChange,
+  disabled
+}: InsightsModelSelectorProps) {
+  const [showCustomModal, setShowCustomModal] = useState(false);
+
+  // Default to 'balanced' if no config
+  const selectedProfileId = currentConfig?.profileId || 'balanced';
+  const profile = DEFAULT_AGENT_PROFILES.find(p => p.id === selectedProfileId);
+
+  // Get the appropriate icon
+  const Icon = selectedProfileId === 'custom'
+    ? Sliders
+    : (profile?.icon ? iconMap[profile.icon] : Scale);
+
+  const handleSelectProfile = (profileId: string) => {
+    if (profileId === 'custom') {
+      setShowCustomModal(true);
+      return;
+    }
+
+    const selected = DEFAULT_AGENT_PROFILES.find(p => p.id === profileId);
+    if (selected) {
+      onConfigChange({
+        profileId: selected.id,
+        model: selected.model,
+        thinkingLevel: selected.thinkingLevel
+      });
+    }
+  };
+
+  const handleCustomSave = (config: InsightsModelConfig) => {
+    onConfigChange(config);
+    setShowCustomModal(false);
+  };
+
+  // Build display text for current selection
+  const getDisplayText = () => {
+    if (selectedProfileId === 'custom' && currentConfig) {
+      const modelLabel = AVAILABLE_MODELS.find(m => m.value === currentConfig.model)?.label || currentConfig.model;
+      return `${modelLabel} + ${currentConfig.thinkingLevel}`;
+    }
+    return profile?.name || 'Balanced';
+  };
+
+  return (
+    <>
+      <DropdownMenu>
+        <DropdownMenuTrigger asChild>
+          <Button
+            variant="ghost"
+            size="sm"
+            className="h-8 gap-2 px-2"
+            disabled={disabled}
+            title={`Model: ${getDisplayText()}`}
+          >
+            <Icon className="h-4 w-4" />
+            <span className="hidden text-xs text-muted-foreground sm:inline">
+              {getDisplayText()}
+            </span>
+          </Button>
+        </DropdownMenuTrigger>
+        <DropdownMenuContent align="end" className="w-64">
+          <DropdownMenuLabel>Agent Profile</DropdownMenuLabel>
+          {DEFAULT_AGENT_PROFILES.map((p) => {
+            const ProfileIcon = iconMap[p.icon || 'Brain'];
+            const isSelected = selectedProfileId === p.id;
+            const modelLabel = AVAILABLE_MODELS.find(m => m.value === p.model)?.label;
+            return (
+              <DropdownMenuItem
+                key={p.id}
+                onClick={() => handleSelectProfile(p.id)}
+                className="flex cursor-pointer items-center gap-2"
+              >
+                <ProfileIcon className="h-4 w-4 shrink-0" />
+                <div className="min-w-0 flex-1">
+                  <div className="font-medium">{p.name}</div>
+                  <div className="truncate text-xs text-muted-foreground">
+                    {modelLabel} + {p.thinkingLevel}
+                  </div>
+                </div>
+                {isSelected && (
+                  <Check className="h-4 w-4 shrink-0 text-primary" />
+                )}
+              </DropdownMenuItem>
+            );
+          })}
+          <DropdownMenuSeparator />
+          <DropdownMenuItem
+            onClick={() => handleSelectProfile('custom')}
+            className="flex cursor-pointer items-center gap-2"
+          >
+            <Sliders className="h-4 w-4 shrink-0" />
+            <div className="flex-1">
+              <div className="font-medium">Custom...</div>
+              <div className="text-xs text-muted-foreground">
+                Choose model & thinking level
+              </div>
+            </div>
+            {selectedProfileId === 'custom' && (
+              <Check className="h-4 w-4 shrink-0 text-primary" />
+            )}
+          </DropdownMenuItem>
+        </DropdownMenuContent>
+      </DropdownMenu>
+
+      {showCustomModal && (
+        <CustomModelModal
+          currentConfig={currentConfig}
+          onSave={handleCustomSave}
+          onClose={() => setShowCustomModal(false)}
+        />
+      )}
+    </>
+  );
+}
diff --git a/auto-claude-ui/src/renderer/stores/insights-store.ts b/auto-claude-ui/src/renderer/stores/insights-store.ts
index b2f875a9..09ee971c 100644
--- a/auto-claude-ui/src/renderer/stores/insights-store.ts
+++ b/auto-claude-ui/src/renderer/stores/insights-store.ts
@@ -6,6 +6,7 @@ import type {
   InsightsChatStatus,
   InsightsStreamChunk,
   InsightsToolUsage,
+  InsightsModelConfig,
   TaskMetadata,
   Task
 } from '../../shared/types';
@@ -221,8 +222,9 @@ export async function loadInsightsSession(projectId: string): Promise<void> {
   await loadInsightsSessions(projectId);
 }
 
-export function sendMessage(projectId: string, message: string): void {
+export function sendMessage(projectId: string, message: string, modelConfig?: InsightsModelConfig): void {
   const store = useInsightsStore.getState();
+  const session = store.session;
 
   // Add user message to session
   const userMessage: InsightsChatMessage = {
@@ -242,8 +244,11 @@ export function sendMessage(projectId: string, message: string): void {
     message: 'Processing your message...'
   });
 
+  // Use provided modelConfig, or fall back to session's config
+  const configToUse = modelConfig || session?.modelConfig;
+
   // Send to main process
-  window.electronAPI.sendInsightsMessage(projectId, message);
+  window.electronAPI.sendInsightsMessage(projectId, message, configToUse);
 }
 
 export async function clearSession(projectId: string): Promise<void> {
@@ -296,6 +301,25 @@ export async function renameSession(projectId: string, sessionId: string, newTit
   return false;
 }
 
+export async function updateModelConfig(projectId: string, sessionId: string, modelConfig: InsightsModelConfig): Promise<boolean> {
+  const result = await window.electronAPI.updateInsightsModelConfig(projectId, sessionId, modelConfig);
+  if (result.success) {
+    // Update local session state
+    const store = useInsightsStore.getState();
+    if (store.session?.id === sessionId) {
+      store.setSession({
+        ...store.session,
+        modelConfig,
+        updatedAt: new Date()
+      });
+    }
+    // Reload sessions list to reflect the change
+    await loadInsightsSessions(projectId);
+    return true;
+  }
+  return false;
+}
+
 export async function createTaskFromSuggestion(
   projectId: string,
   title: string,
diff --git a/auto-claude-ui/src/shared/constants/ipc.ts b/auto-claude-ui/src/shared/constants/ipc.ts
index f5ec0ab0..dfb3ebda 100644
--- a/auto-claude-ui/src/shared/constants/ipc.ts
+++ b/auto-claude-ui/src/shared/constants/ipc.ts
@@ -248,6 +248,7 @@ export const IPC_CHANNELS = {
   INSIGHTS_SWITCH_SESSION: 'insights:switchSession',
   INSIGHTS_DELETE_SESSION: 'insights:deleteSession',
   INSIGHTS_RENAME_SESSION: 'insights:renameSession',
+  INSIGHTS_UPDATE_MODEL_CONFIG: 'insights:updateModelConfig',
 
   // Insights events (main -> renderer)
   INSIGHTS_STREAM_CHUNK: 'insights:streamChunk',
diff --git a/auto-claude-ui/src/shared/constants/models.ts b/auto-claude-ui/src/shared/constants/models.ts
index 3f987f2d..ce832c2c 100644
--- a/auto-claude-ui/src/shared/constants/models.ts
+++ b/auto-claude-ui/src/shared/constants/models.ts
@@ -15,6 +15,22 @@ export const AVAILABLE_MODELS = [
   { value: 'haiku', label: 'Claude Haiku 4.5' }
 ] as const;
 
+// Maps model shorthand to actual Claude model IDs
+export const MODEL_ID_MAP: Record<string, string> = {
+  opus: 'claude-opus-4-5-20251101',
+  sonnet: 'claude-sonnet-4-5-20250929',
+  haiku: 'claude-haiku-4-5-20250929'
+} as const;
+
+// Maps thinking levels to budget tokens (null = no extended thinking)
+export const THINKING_BUDGET_MAP: Record<string, number | null> = {
+  none: null,
+  low: 1024,
+  medium: 4096,
+  high: 16384,
+  ultrathink: 65536
+} as const;
+
 // ============================================
 // Thinking Levels
 // ============================================
diff --git a/auto-claude-ui/src/shared/types/insights.ts b/auto-claude-ui/src/shared/types/insights.ts
index c76892fc..ea8903f8 100644
--- a/auto-claude-ui/src/shared/types/insights.ts
+++ b/auto-claude-ui/src/shared/types/insights.ts
@@ -154,6 +154,16 @@ export interface IdeationSummary {
 // Insights Chat Types
 // ============================================
 
+import type { ThinkingLevel } from './settings';
+import type { ModelType } from './task';
+
+// Model configuration for insights sessions
+export interface InsightsModelConfig {
+  profileId: string;           // 'complex' | 'balanced' | 'quick' | 'custom'
+  model: ModelType;            // 'haiku' | 'sonnet' | 'opus'
+  thinkingLevel: ThinkingLevel;
+}
+
 export type InsightsChatRole = 'user' | 'assistant';
 
 // Tool usage record for showing what tools the AI used
@@ -183,6 +193,7 @@ export interface InsightsSession {
   projectId: string;
   title?: string; // Auto-generated from first message or user-set
   messages: InsightsChatMessage[];
+  modelConfig?: InsightsModelConfig; // Per-session model configuration
   createdAt: Date;
   updatedAt: Date;
 }
@@ -193,6 +204,7 @@ export interface InsightsSessionSummary {
   projectId: string;
   title: string;
   messageCount: number;
+  modelConfig?: InsightsModelConfig; // For displaying model indicator in sidebar
   createdAt: Date;
   updatedAt: Date;
 }
diff --git a/auto-claude/runners/insights_runner.py b/auto-claude/runners/insights_runner.py
index 55762f2f..81217061 100644
--- a/auto-claude/runners/insights_runner.py
+++ b/auto-claude/runners/insights_runner.py
@@ -128,7 +128,13 @@ Be conversational and helpful. Focus on providing actionable insights and clear
 Keep responses concise but informative."""
 
 
-async def run_with_sdk(project_dir: str, message: str, history: list) -> None:
+async def run_with_sdk(
+    project_dir: str,
+    message: str,
+    history: list,
+    model: str = "claude-sonnet-4-5-20250929",
+    thinking_level: str = "medium"
+) -> None:
     """Run the chat using Claude SDK with streaming."""
     if not SDK_AVAILABLE:
         print("Claude SDK not available, falling back to simple mode", file=sys.stderr)
@@ -163,11 +169,18 @@ async def run_with_sdk(project_dir: str, message: str, history: list) -> None:
 
 Current question: {message}"""
 
+    debug(
+        "insights_runner",
+        "Using model configuration",
+        model=model,
+        thinking_level=thinking_level,
+    )
+
     try:
         # Create Claude SDK client with appropriate settings for insights
         client = ClaudeSDKClient(
             options=ClaudeAgentOptions(
-                model="claude-opus-4-5-20251101",  # Opus 4.5 for quality analysis
+                model=model,  # Use configured model
                 system_prompt=system_prompt,
                 allowed_tools=[
                     "Read",
@@ -318,18 +331,33 @@ def main():
     parser.add_argument("--project-dir", required=True, help="Project directory path")
     parser.add_argument("--message", required=True, help="User message")
     parser.add_argument("--history", default="[]", help="JSON conversation history")
+    parser.add_argument(
+        "--model",
+        default="claude-sonnet-4-5-20250929",
+        help="Claude model ID (default: claude-sonnet-4-5-20250929)"
+    )
+    parser.add_argument(
+        "--thinking-level",
+        default="medium",
+        choices=["none", "low", "medium", "high", "ultrathink"],
+        help="Thinking level for extended reasoning (default: medium)"
+    )
     args = parser.parse_args()
 
     debug_section("insights_runner", "Starting Insights Chat")
 
     project_dir = args.project_dir
     user_message = args.message
+    model = args.model
+    thinking_level = args.thinking_level
 
     debug(
         "insights_runner",
         "Arguments",
         project_dir=project_dir,
         message_length=len(user_message),
+        model=model,
+        thinking_level=thinking_level,
     )
 
     try:
@@ -341,7 +369,7 @@ def main():
 
     # Run the async SDK function
     debug("insights_runner", "Running SDK query")
-    asyncio.run(run_with_sdk(project_dir, user_message, history))
+    asyncio.run(run_with_sdk(project_dir, user_message, history, model, thinking_level))
     debug_success("insights_runner", "Query completed")