fix: API would be stringified twice. That is now fixed.

Previously, the model parameter was accepted by the /api/agent endpoint
and extracted from requests, but was never passed through to the Claude
SDK or Codex SDK, causing all requests to use default models regardless
of user selection.

Changes:
- Add model parameter to queryClaudeSDK() options in routes/agent.js
- Add model to threadOptions in openai-codex.js
- Remove unused /cost slash command and PRICING constants
- Centralize all model definitions in shared/modelConstants.js
- Update API documentation to dynamically load models from constants

public/api-docs.html

@@ -489,7 +489,7 @@
                                 <span class="endpoint-path"><span class="api-url">http://localhost:3001</span>/api/agent</span>
                             </div>
 
-                            <p>Trigger an AI agent (Claude or Cursor) to work on a project.</p>
+                            <p>Trigger an AI agent (Claude, Cursor, or Codex) to work on a project.</p>
 
                             <h4>Request Body Parameters</h4>
                             <table>
@@ -524,7 +524,7 @@
                                         <td><code>provider</code></td>
                                         <td>string</td>
                                         <td><span class="badge badge-optional">Optional</span></td>
-                                        <td><code>claude</code> or <code>cursor</code> (default: <code>claude</code>)</td>
+                                        <td><code>claude</code>, <code>cursor</code>, or <code>codex</code> (default: <code>claude</code>)</td>
                                     </tr>
                                     <tr>
                                         <td><code>stream</code></td>
@@ -536,7 +536,9 @@
                                         <td><code>model</code></td>
                                         <td>string</td>
                                         <td><span class="badge badge-optional">Optional</span></td>
-                                        <td>Model to use (for Cursor)</td>
+                                        <td id="model-options-cell">
+                                            Model identifier for the AI provider (loading from constants...)
+                                        </td>
                                     </tr>
                                     <tr>
                                         <td><code>cleanup</code></td>
@@ -818,31 +820,51 @@ data: {"type":"done"}</code></pre>
         </div>
     </div>
 
-    <script>
+    <script type="module">
+        // Import model constants
+        import { CLAUDE_MODELS, CURSOR_MODELS, CODEX_MODELS } from '/shared/modelConstants.js';
+
         // Dynamic URL replacement
         const apiUrl = window.location.origin;
         document.querySelectorAll('.api-url').forEach(el => {
             el.textContent = apiUrl;
         });
 
+        // Dynamically populate model documentation
+        window.addEventListener('DOMContentLoaded', () => {
+            const modelCell = document.getElementById('model-options-cell');
+            if (modelCell) {
+                const claudeModels = CLAUDE_MODELS.OPTIONS.map(m => `<code>${m.value}</code>`).join(', ');
+                const cursorModels = CURSOR_MODELS.OPTIONS.slice(0, 8).map(m => `<code>${m.value}</code>`).join(', ');
+                const codexModels = CODEX_MODELS.OPTIONS.map(m => `<code>${m.value}</code>`).join(', ');
+
+                modelCell.innerHTML = `
+                    Model identifier for the AI provider:<br><br>
+                    <strong>Claude:</strong> ${claudeModels} (default: <code>${CLAUDE_MODELS.DEFAULT}</code>)<br><br>
+                    <strong>Cursor:</strong> ${cursorModels}, and more (default: <code>${CURSOR_MODELS.DEFAULT}</code>)<br><br>
+                    <strong>Codex:</strong> ${codexModels} (default: <code>${CODEX_MODELS.DEFAULT}</code>)
+                `;
+            }
+        });
+
         // Tab switching
-        function showTab(tabName) {
+        window.showTab = function(tabName) {
             const parentBlock = event.target.closest('.example-block');
             if (!parentBlock) return;
-            
+
             parentBlock.querySelectorAll('.tab-content').forEach(tab => {
                 tab.classList.remove('active');
             });
             parentBlock.querySelectorAll('.tab-button').forEach(btn => {
                 btn.classList.remove('active');
             });
-            
+
             const targetTab = parentBlock.querySelector('#' + tabName);
             if (targetTab) {
                 targetTab.classList.add('active');
                 event.target.classList.add('active');
             }
-        }
+        };
     </script>
 
     <!-- Prism.js -->

server/claude-sdk.js

@@ -16,6 +16,7 @@ import { query } from '@anthropic-ai/claude-agent-sdk';
 import { promises as fs } from 'fs';
 import path from 'path';
 import os from 'os';
+import { CLAUDE_MODELS } from '../shared/modelConstants.js';
 
 // Session tracking: Map of session IDs to active query instances
 const activeSessions = new Map();
@@ -77,7 +78,7 @@ function mapCliOptionsToSDK(options = {}) {
 
   // Map model (default to sonnet)
   // Valid models: sonnet, opus, haiku, opusplan, sonnet[1m]
-  sdkOptions.model = options.model || 'sonnet';
+  sdkOptions.model = options.model || CLAUDE_MODELS.DEFAULT;
   console.log(`Using model: ${sdkOptions.model}`);
 
   // Map system prompt configuration
@@ -397,10 +398,10 @@ async function queryClaudeSDK(command, options = {}, ws) {
         // Send session-created event only once for new sessions
         if (!sessionId && !sessionCreatedSent) {
           sessionCreatedSent = true;
-          ws.send(JSON.stringify({
+          ws.send({
             type: 'session-created',
             sessionId: capturedSessionId
-          }));
+          });
         } else {
           console.log('Not sending session-created. sessionId:', sessionId, 'sessionCreatedSent:', sessionCreatedSent);
         }
@@ -410,20 +411,20 @@ async function queryClaudeSDK(command, options = {}, ws) {
 
       // Transform and send message to WebSocket
       const transformedMessage = transformMessage(message);
-      ws.send(JSON.stringify({
+      ws.send({
         type: 'claude-response',
         data: transformedMessage
-      }));
+      });
 
       // Extract and send token budget updates from result messages
       if (message.type === 'result') {
         const tokenBudget = extractTokenBudget(message);
         if (tokenBudget) {
           console.log('Token budget from modelUsage:', tokenBudget);
-          ws.send(JSON.stringify({
+          ws.send({
             type: 'token-budget',
             data: tokenBudget
-          }));
+          });
         }
       }
     }
@@ -438,12 +439,12 @@ async function queryClaudeSDK(command, options = {}, ws) {
 
     // Send completion event
     console.log('Streaming complete, sending claude-complete event');
-    ws.send(JSON.stringify({
+    ws.send({
       type: 'claude-complete',
       sessionId: capturedSessionId,
       exitCode: 0,
       isNewSession: !sessionId && !!command
-    }));
+    });
     console.log('claude-complete event sent');
 
   } catch (error) {
@@ -458,10 +459,10 @@ async function queryClaudeSDK(command, options = {}, ws) {
     await cleanupTempFiles(tempImagePaths, tempDir);
 
     // Send error to WebSocket
-    ws.send(JSON.stringify({
+    ws.send({
       type: 'claude-error',
       error: error.message
-    }));
+    });
 
     throw error;
   }

server/cursor-cli.js

@@ -102,29 +102,29 @@ async function spawnCursor(command, options = {}, ws) {
                   // Send session-created event only once for new sessions
                   if (!sessionId && !sessionCreatedSent) {
                     sessionCreatedSent = true;
-                    ws.send(JSON.stringify({
+                    ws.send({
                       type: 'session-created',
                       sessionId: capturedSessionId,
                       model: response.model,
                       cwd: response.cwd
-                    }));
+                    });
                   }
                 }
                 
                 // Send system info to frontend
-                ws.send(JSON.stringify({
+                ws.send({
                   type: 'cursor-system',
                   data: response
-                }));
+                });
               }
               break;
               
             case 'user':
               // Forward user message
-              ws.send(JSON.stringify({
+              ws.send({
                 type: 'cursor-user',
                 data: response
-              }));
+              });
               break;
               
             case 'assistant':
@@ -134,7 +134,7 @@ async function spawnCursor(command, options = {}, ws) {
                 messageBuffer += textContent;
                 
                 // Send as Claude-compatible format for frontend
-                ws.send(JSON.stringify({
+                ws.send({
                   type: 'claude-response',
                   data: {
                     type: 'content_block_delta',
@@ -143,7 +143,7 @@ async function spawnCursor(command, options = {}, ws) {
                       text: textContent
                     }
                   }
-                }));
+                });
               }
               break;
               
@@ -153,37 +153,37 @@ async function spawnCursor(command, options = {}, ws) {
               
               // Send final message if we have buffered content
               if (messageBuffer) {
-                ws.send(JSON.stringify({
+                ws.send({
                   type: 'claude-response',
                   data: {
                     type: 'content_block_stop'
                   }
-                }));
+                });
               }
               
               // Send completion event
-              ws.send(JSON.stringify({
+              ws.send({
                 type: 'cursor-result',
                 sessionId: capturedSessionId || sessionId,
                 data: response,
                 success: response.subtype === 'success'
-              }));
+              });
               break;
               
             default:
               // Forward any other message types
-              ws.send(JSON.stringify({
+              ws.send({
                 type: 'cursor-response',
                 data: response
-              }));
+              });
           }
         } catch (parseError) {
           console.log('📄 Non-JSON response:', line);
           // If not JSON, send as raw text
-          ws.send(JSON.stringify({
+          ws.send({
             type: 'cursor-output',
             data: line
-          }));
+          });
         }
       }
     });
@@ -191,10 +191,10 @@ async function spawnCursor(command, options = {}, ws) {
     // Handle stderr
     cursorProcess.stderr.on('data', (data) => {
       console.error('Cursor CLI stderr:', data.toString());
-      ws.send(JSON.stringify({
+      ws.send({
         type: 'cursor-error',
         error: data.toString()
-      }));
+      });
     });
     
     // Handle process completion
@@ -205,12 +205,12 @@ async function spawnCursor(command, options = {}, ws) {
       const finalSessionId = capturedSessionId || sessionId || processKey;
       activeCursorProcesses.delete(finalSessionId);
 
-      ws.send(JSON.stringify({
+      ws.send({
         type: 'claude-complete',
         sessionId: finalSessionId,
         exitCode: code,
         isNewSession: !sessionId && !!command // Flag to indicate this was a new session
-      }));
+      });
       
       if (code === 0) {
         resolve();
@@ -226,12 +226,12 @@ async function spawnCursor(command, options = {}, ws) {
       // Clean up process reference on error
       const finalSessionId = capturedSessionId || sessionId || processKey;
       activeCursorProcesses.delete(finalSessionId);
-      
+
-      ws.send(JSON.stringify({
+      ws.send({
         type: 'cursor-error',
         error: error.message
-      }));
+      });
-      
+
       reject(error);
     });
     

server/index.js

@@ -717,6 +717,32 @@ wss.on('connection', (ws, request) => {
     }
 });
 
+/**
+ * WebSocket Writer - Wrapper for WebSocket to match SSEStreamWriter interface
+ */
+class WebSocketWriter {
+  constructor(ws) {
+    this.ws = ws;
+    this.sessionId = null;
+    this.isWebSocketWriter = true;  // Marker for transport detection
+  }
+
+  send(data) {
+    if (this.ws.readyState === 1) { // WebSocket.OPEN
+      // Providers send raw objects, we stringify for WebSocket
+      this.ws.send(JSON.stringify(data));
+    }
+  }
+
+  setSessionId(sessionId) {
+    this.sessionId = sessionId;
+  }
+
+  getSessionId() {
+    return this.sessionId;
+  }
+}
+
 // Handle chat WebSocket connections
 function handleChatConnection(ws) {
     console.log('[INFO] Chat WebSocket connected');
@@ -724,6 +750,9 @@ function handleChatConnection(ws) {
     // Add to connected clients for project updates
     connectedClients.add(ws);
 
+    // Wrap WebSocket with writer for consistent interface with SSEStreamWriter
+    const writer = new WebSocketWriter(ws);
+
     ws.on('message', async (message) => {
         try {
             const data = JSON.parse(message);
@@ -734,19 +763,19 @@ function handleChatConnection(ws) {
                 console.log('🔄 Session:', data.options?.sessionId ? 'Resume' : 'New');
 
                 // Use Claude Agents SDK
-                await queryClaudeSDK(data.command, data.options, ws);
+                await queryClaudeSDK(data.command, data.options, writer);
             } else if (data.type === 'cursor-command') {
                 console.log('[DEBUG] Cursor message:', data.command || '[Continue/Resume]');
                 console.log('📁 Project:', data.options?.cwd || 'Unknown');
                 console.log('🔄 Session:', data.options?.sessionId ? 'Resume' : 'New');
                 console.log('🤖 Model:', data.options?.model || 'default');
-                await spawnCursor(data.command, data.options, ws);
+                await spawnCursor(data.command, data.options, writer);
             } else if (data.type === 'codex-command') {
                 console.log('[DEBUG] Codex message:', data.command || '[Continue/Resume]');
                 console.log('📁 Project:', data.options?.projectPath || data.options?.cwd || 'Unknown');
                 console.log('🔄 Session:', data.options?.sessionId ? 'Resume' : 'New');
                 console.log('🤖 Model:', data.options?.model || 'default');
-                await queryCodex(data.command, data.options, ws);
+                await queryCodex(data.command, data.options, writer);
             } else if (data.type === 'cursor-resume') {
                 // Backward compatibility: treat as cursor-command with resume and no prompt
                 console.log('[DEBUG] Cursor resume session (compat):', data.sessionId);
@@ -754,7 +783,7 @@ function handleChatConnection(ws) {
                     sessionId: data.sessionId,
                     resume: true,
                     cwd: data.options?.cwd
-                }, ws);
+                }, writer);
             } else if (data.type === 'abort-session') {
                 console.log('[DEBUG] Abort session request:', data.sessionId);
                 const provider = data.provider || 'claude';
@@ -769,21 +798,21 @@ function handleChatConnection(ws) {
                     success = await abortClaudeSDKSession(data.sessionId);
                 }
 
-                ws.send(JSON.stringify({
+                writer.send({
                     type: 'session-aborted',
                     sessionId: data.sessionId,
                     provider,
                     success
-                }));
+                });
             } else if (data.type === 'cursor-abort') {
                 console.log('[DEBUG] Abort Cursor session:', data.sessionId);
                 const success = abortCursorSession(data.sessionId);
-                ws.send(JSON.stringify({
+                writer.send({
                     type: 'session-aborted',
                     sessionId: data.sessionId,
                     provider: 'cursor',
                     success
-                }));
+                });
             } else if (data.type === 'check-session-status') {
                 // Check if a specific session is currently processing
                 const provider = data.provider || 'claude';
@@ -799,12 +828,12 @@ function handleChatConnection(ws) {
                     isActive = isClaudeSDKSessionActive(sessionId);
                 }
 
-                ws.send(JSON.stringify({
+                writer.send({
                     type: 'session-status',
                     sessionId,
                     provider,
                     isProcessing: isActive
-                }));
+                });
             } else if (data.type === 'get-active-sessions') {
                 // Get all currently active sessions
                 const activeSessions = {
@@ -812,17 +841,17 @@ function handleChatConnection(ws) {
                     cursor: getActiveCursorSessions(),
                     codex: getActiveCodexSessions()
                 };
-                ws.send(JSON.stringify({
+                writer.send({
                     type: 'active-sessions',
                     sessions: activeSessions
-                }));
+                });
             }
         } catch (error) {
             console.error('[ERROR] Chat WebSocket error:', error.message);
-            ws.send(JSON.stringify({
+            writer.send({
                 type: 'error',
                 error: error.message
-            }));
+            });
         }
     });
 

server/openai-codex.js

@@ -213,7 +213,8 @@ export async function queryCodex(command, options = {}, ws) {
       workingDirectory,
       skipGitRepoCheck: true,
       sandboxMode,
-      approvalPolicy
+      approvalPolicy,
+      model
     };
 
     // Start or resume thread
@@ -359,12 +360,12 @@ export function getActiveCodexSessions() {
  */
 function sendMessage(ws, data) {
   try {
-    if (typeof ws.send === 'function') {
+    if (ws.isSSEStreamWriter || ws.isWebSocketWriter) {
-      // WebSocket
+      // Writer handles stringification (SSEStreamWriter or WebSocketWriter)
+      ws.send(data);
+    } else if (typeof ws.send === 'function') {
+      // Raw WebSocket - stringify here
       ws.send(JSON.stringify(data));
-    } else if (typeof ws.write === 'function') {
-      // SSE writer (for agent API)
-      ws.write(`data: ${JSON.stringify(data)}\n\n`);
     }
   } catch (error) {
     console.error('[Codex] Error sending message:', error);

server/routes/agent.js

@@ -10,6 +10,7 @@ import { queryClaudeSDK } from '../claude-sdk.js';
 import { spawnCursor } from '../cursor-cli.js';
 import { queryCodex } from '../openai-codex.js';
 import { Octokit } from '@octokit/rest';
+import { CLAUDE_MODELS, CURSOR_MODELS, CODEX_MODELS } from '../../shared/modelConstants.js';
 
 const router = express.Router();
 
@@ -450,6 +451,7 @@ class SSEStreamWriter {
   constructor(res) {
     this.res = res;
     this.sessionId = null;
+    this.isSSEStreamWriter = true;  // Marker for transport detection
   }
 
   send(data) {
@@ -457,7 +459,7 @@ class SSEStreamWriter {
       return;
     }
 
-    // Format as SSE
+    // Format as SSE - providers send raw objects, we stringify
     this.res.write(`data: ${JSON.stringify(data)}\n\n`);
   }
 
@@ -634,9 +636,14 @@ class ResponseCollector {
  *                          - true: Returns text/event-stream with incremental updates
  *                          - false: Returns complete JSON response after completion
  *
- * @param {string} model - (Optional) Model identifier for Cursor provider.
+ * @param {string} model - (Optional) Model identifier for providers.
- *                        Only applicable when provider='cursor'.
+ *
- *                        Examples: 'gpt-4', 'claude-3-opus', etc.
+ *                        Claude models: 'sonnet' (default), 'opus', 'haiku', 'opusplan', 'sonnet[1m]'
+ *                        Cursor models: 'gpt-5' (default), 'gpt-5.2', 'gpt-5.2-high', 'sonnet-4.5', 'opus-4.5',
+ *                                       'gemini-3-pro', 'composer-1', 'auto', 'gpt-5.1', 'gpt-5.1-high',
+ *                                       'gpt-5.1-codex', 'gpt-5.1-codex-high', 'gpt-5.1-codex-max',
+ *                                       'gpt-5.1-codex-max-high', 'opus-4.1', 'grok', and thinking variants
+ *                        Codex models: 'gpt-5.2' (default), 'gpt-5.1-codex-max', 'o3', 'o4-mini'
  *
  * @param {boolean} cleanup - (Optional) Auto-cleanup project directory after completion.
  *                           Default: true
@@ -939,6 +946,7 @@ router.post('/', validateExternalApiKey, async (req, res) => {
         projectPath: finalProjectPath,
         cwd: finalProjectPath,
         sessionId: null, // New session
+        model: model,
         permissionMode: 'bypassPermissions' // Bypass all permissions for API calls
       }, writer);
 
@@ -959,7 +967,7 @@ router.post('/', validateExternalApiKey, async (req, res) => {
         projectPath: finalProjectPath,
         cwd: finalProjectPath,
         sessionId: null,
-        model: model || 'gpt-5.2',
+        model: model || CODEX_MODELS.DEFAULT,
         permissionMode: 'bypassPermissions'
       }, writer);
     }

server/routes/commands.js

@@ -4,6 +4,7 @@ import path from 'path';
 import { fileURLToPath } from 'url';
 import os from 'os';
 import matter from 'gray-matter';
+import { CLAUDE_MODELS, CURSOR_MODELS, CODEX_MODELS } from '../../shared/modelConstants.js';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
@@ -182,23 +183,15 @@ Custom commands can be created in:
   },
 
   '/model': async (args, context) => {
-    // Read available models from config or defaults
+    // Read available models from centralized constants
     const availableModels = {
-      claude: [
+      claude: CLAUDE_MODELS.OPTIONS.map(o => o.value),
-        'claude-sonnet-4.5',
+      cursor: CURSOR_MODELS.OPTIONS.map(o => o.value),
-        'claude-sonnet-4',
+      codex: CODEX_MODELS.OPTIONS.map(o => o.value)
-        'claude-opus-4',
-        'claude-sonnet-3.5'
-      ],
-      cursor: [
-        'gpt-5',
-        'sonnet-4',
-        'opus-4.1'
-      ]
     };
 
     const currentProvider = context?.provider || 'claude';
-    const currentModel = context?.model || 'claude-sonnet-4.5';
+    const currentModel = context?.model || CLAUDE_MODELS.DEFAULT;
 
     return {
       type: 'builtin',
@@ -216,50 +209,6 @@ Custom commands can be created in:
     };
   },
 
-  '/cost': async (args, context) => {
-    // Calculate token usage and cost
-    const sessionId = context?.sessionId;
-    const tokenUsage = context?.tokenUsage || { used: 0, total: 200000 };
-
-    const costPerMillion = {
-      'claude-sonnet-4.5': { input: 3, output: 15 },
-      'claude-sonnet-4': { input: 3, output: 15 },
-      'claude-opus-4': { input: 15, output: 75 },
-      'gpt-5': { input: 5, output: 15 }
-    };
-
-    const model = context?.model || 'claude-sonnet-4.5';
-    const rates = costPerMillion[model] || costPerMillion['claude-sonnet-4.5'];
-
-    // Estimate 70% input, 30% output
-    const estimatedInputTokens = Math.floor(tokenUsage.used * 0.7);
-    const estimatedOutputTokens = Math.floor(tokenUsage.used * 0.3);
-
-    const inputCost = (estimatedInputTokens / 1000000) * rates.input;
-    const outputCost = (estimatedOutputTokens / 1000000) * rates.output;
-    const totalCost = inputCost + outputCost;
-
-    return {
-      type: 'builtin',
-      action: 'cost',
-      data: {
-        tokenUsage: {
-          used: tokenUsage.used,
-          total: tokenUsage.total,
-          percentage: ((tokenUsage.used / tokenUsage.total) * 100).toFixed(1)
-        },
-        cost: {
-          input: inputCost.toFixed(4),
-          output: outputCost.toFixed(4),
-          total: totalCost.toFixed(4),
-          currency: 'USD'
-        },
-        model,
-        rates
-      }
-    };
-  },
-
   '/status': async (args, context) => {
     // Read version from package.json
     const packageJsonPath = path.join(path.dirname(__dirname), '..', 'package.json');

server/routes/cursor.js

@@ -6,6 +6,7 @@ import { spawn } from 'child_process';
 import sqlite3 from 'sqlite3';
 import { open } from 'sqlite';
 import crypto from 'crypto';
+import { CURSOR_MODELS } from '../../shared/modelConstants.js';
 
 const router = express.Router();
 
@@ -33,7 +34,7 @@ router.get('/config', async (req, res) => {
         config: {
           version: 1,
           model: {
-            modelId: "gpt-5",
+            modelId: CURSOR_MODELS.DEFAULT,
             displayName: "GPT-5"
           },
           permissions: {

shared/modelConstants.js

@@ -0,0 +1,65 @@
+/**
+ * Centralized Model Definitions
+ * Single source of truth for all supported AI models
+ */
+
+/**
+ * Claude (Anthropic) Models
+ *
+ * Note: Claude uses two different formats:
+ * - SDK format ('sonnet', 'opus') - used by the UI and claude-sdk.js
+ * - API format ('claude-sonnet-4.5') - used by slash commands for display
+ */
+export const CLAUDE_MODELS = {
+  // Models in SDK format (what the actual SDK accepts)
+  OPTIONS: [
+    { value: 'sonnet', label: 'Sonnet' },
+    { value: 'opus', label: 'Opus' },
+    { value: 'haiku', label: 'Haiku' },
+    { value: 'opusplan', label: 'Opus Plan' },
+    { value: 'sonnet[1m]', label: 'Sonnet [1M]' }
+  ],
+
+  DEFAULT: 'sonnet'
+};
+
+/**
+ * Cursor Models
+ */
+export const CURSOR_MODELS = {
+  OPTIONS: [
+    { value: 'gpt-5.2-high', label: 'GPT-5.2 High' },
+    { value: 'gemini-3-pro', label: 'Gemini 3 Pro' },
+    { value: 'opus-4.5-thinking', label: 'Claude 4.5 Opus (Thinking)' },
+    { value: 'gpt-5.2', label: 'GPT-5.2' },
+    { value: 'gpt-5.1', label: 'GPT-5.1' },
+    { value: 'gpt-5.1-high', label: 'GPT-5.1 High' },
+    { value: 'composer-1', label: 'Composer 1' },
+    { value: 'auto', label: 'Auto' },
+    { value: 'sonnet-4.5', label: 'Claude 4.5 Sonnet' },
+    { value: 'sonnet-4.5-thinking', label: 'Claude 4.5 Sonnet (Thinking)' },
+    { value: 'opus-4.5', label: 'Claude 4.5 Opus' },
+    { value: 'gpt-5.1-codex', label: 'GPT-5.1 Codex' },
+    { value: 'gpt-5.1-codex-high', label: 'GPT-5.1 Codex High' },
+    { value: 'gpt-5.1-codex-max', label: 'GPT-5.1 Codex Max' },
+    { value: 'gpt-5.1-codex-max-high', label: 'GPT-5.1 Codex Max High' },
+    { value: 'opus-4.1', label: 'Claude 4.1 Opus' },
+    { value: 'grok', label: 'Grok' }
+  ],
+
+  DEFAULT: 'gpt-5'
+};
+
+/**
+ * Codex (OpenAI) Models
+ */
+export const CODEX_MODELS = {
+  OPTIONS: [
+    { value: 'gpt-5.2', label: 'GPT-5.2' },
+    { value: 'gpt-5.1-codex-max', label: 'GPT-5.1 Codex Max' },
+    { value: 'o3', label: 'O3' },
+    { value: 'o4-mini', label: 'O4-mini' }
+  ],
+
+  DEFAULT: 'gpt-5.2'
+};

src/components/ChatInterface.jsx

@@ -35,6 +35,7 @@ import { MicButton } from './MicButton.jsx';
 import { api, authenticatedFetch } from '../utils/api';
 import Fuse from 'fuse.js';
 import CommandMenu from './CommandMenu';
+import { CLAUDE_MODELS, CURSOR_MODELS, CODEX_MODELS } from '../../shared/modelConstants';
 
 
 // Helper function to decode HTML entities in text
@@ -1723,13 +1724,13 @@ function ChatInterface({ selectedProject, selectedSession, ws, sendMessage, mess
     return localStorage.getItem('selected-provider') || 'claude';
   });
   const [cursorModel, setCursorModel] = useState(() => {
-    return localStorage.getItem('cursor-model') || 'gpt-5';
+    return localStorage.getItem('cursor-model') || CURSOR_MODELS.DEFAULT;
   });
   const [claudeModel, setClaudeModel] = useState(() => {
-    return localStorage.getItem('claude-model') || 'sonnet';
+    return localStorage.getItem('claude-model') || CLAUDE_MODELS.DEFAULT;
   });
   const [codexModel, setCodexModel] = useState(() => {
-    return localStorage.getItem('codex-model') || 'gpt-5.2';
+    return localStorage.getItem('codex-model') || CODEX_MODELS.DEFAULT;
   });
   // Load permission mode for the current session
   useEffect(() => {
@@ -1758,17 +1759,10 @@ function ChatInterface({ selectedProject, selectedSession, ws, sendMessage, mess
       .then(res => res.json())
       .then(data => {
         if (data.success && data.config?.model?.modelId) {
-          // Map Cursor model IDs to our simplified names
+          // Use the model from config directly
-          const modelMap = {
+          const modelId = data.config.model.modelId;
-            'gpt-5': 'gpt-5',
-            'claude-4-sonnet': 'sonnet-4',
-            'sonnet-4': 'sonnet-4',
-            'claude-4-opus': 'opus-4.1',
-            'opus-4.1': 'opus-4.1'
-          };
-          const mappedModel = modelMap[data.config.model.modelId] || data.config.model.modelId;
           if (!localStorage.getItem('cursor-model')) {
-            setCursorModel(mappedModel);
+            setCursorModel(modelId);
           }
         }
       })
@@ -4547,11 +4541,9 @@ function ChatInterface({ selectedProject, selectedSession, ws, sendMessage, mess
                       }}
                       className="pl-4 pr-10 py-2 text-sm bg-white dark:bg-gray-800 border border-gray-300 dark:border-gray-600 rounded-lg focus:ring-2 focus:ring-purple-500 focus:border-purple-500 min-w-[140px]"
                     >
-                      <option value="sonnet">Sonnet</option>
+                      {CLAUDE_MODELS.OPTIONS.map(({ value, label }) => (
-                      <option value="opus">Opus</option>
+                        <option key={value} value={value}>{label}</option>
-                      <option value="haiku">Haiku</option>
+                      ))}
-                      <option value="opusplan">Opus Plan</option>
-                      <option value="sonnet[1m]">Sonnet [1M]</option>
                     </select>
                   ) : provider === 'codex' ? (
                     <select
@@ -4563,10 +4555,9 @@ function ChatInterface({ selectedProject, selectedSession, ws, sendMessage, mess
                       }}
                       className="pl-4 pr-10 py-2 text-sm bg-white dark:bg-gray-800 border border-gray-300 dark:border-gray-600 rounded-lg focus:ring-2 focus:ring-gray-500 focus:border-gray-500 min-w-[140px]"
                     >
-                      <option value="gpt-5.2">GPT-5.2</option>
+                      {CODEX_MODELS.OPTIONS.map(({ value, label }) => (
-                      <option value="gpt-5.1-codex-max">GPT-5.1 Codex Max</option>
+                        <option key={value} value={value}>{label}</option>
-                      <option value="o3">O3</option>
+                      ))}
-                      <option value="o4-mini">O4-mini</option>
                     </select>
                   ) : (
                     <select
@@ -4579,23 +4570,9 @@ function ChatInterface({ selectedProject, selectedSession, ws, sendMessage, mess
                       className="pl-4 pr-10 py-2 text-sm bg-white dark:bg-gray-800 border border-gray-300 dark:border-gray-600 rounded-lg focus:ring-2 focus:ring-purple-500 focus:border-purple-500 min-w-[140px]"
                       disabled={provider !== 'cursor'}
                     >
-                      <option value="gpt-5.2-high">GPT-5.2 High</option>
+                      {CURSOR_MODELS.OPTIONS.map(({ value, label }) => (
-                      <option value="gemini-3-pro">Gemini 3 Pro</option>
+                        <option key={value} value={value}>{label}</option>
-                      <option value="opus-4.5-thinking">Claude 4.5 Opus (Thinking)</option>
+                      ))}
-                      <option value="gpt-5.2">GPT-5.2</option>
-                      <option value="gpt-5.1">GPT-5.1</option>
-                      <option value="gpt-5.1-high">GPT-5.1 High</option>
-                      <option value="composer-1">Composer 1</option>
-                      <option value="auto">Auto</option>
-                      <option value="sonnet-4.5">Claude 4.5 Sonnet</option>
-                      <option value="sonnet-4.5-thinking">Claude 4.5 Sonnet (Thinking)</option>
-                      <option value="opus-4.5">Claude 4.5 Opus</option>
-                      <option value="gpt-5.1-codex">GPT-5.1 Codex</option>
-                      <option value="gpt-5.1-codex-high">GPT-5.1 Codex High</option>
-                      <option value="gpt-5.1-codex-max">GPT-5.1 Codex Max</option>
-                      <option value="gpt-5.1-codex-max-high">GPT-5.1 Codex Max High</option>
-                      <option value="opus-4.1">Claude 4.1 Opus</option>
-                      <option value="grok">Grok</option>
                     </select>
                   )}
                 </div>