diff --git a/apps/sim/app/api/copilot/chat/route.ts b/apps/sim/app/api/copilot/chat/route.ts
index 5fc8a563ff..9240373cb4 100644
--- a/apps/sim/app/api/copilot/chat/route.ts
+++ b/apps/sim/app/api/copilot/chat/route.ts
@@ -43,6 +43,12 @@ const ChatMessageSchema = z.object({
       'gpt-5',
       'gpt-5-medium',
       'gpt-5-high',
+      'gpt-5.1-fast',
+      'gpt-5.1',
+      'gpt-5.1-medium',
+      'gpt-5.1-high',
+      'gpt-5-codex',
+      'gpt-5.1-codex',
       'gpt-4o',
       'gpt-4.1',
       'o3',
diff --git a/apps/sim/app/api/copilot/user-models/route.ts b/apps/sim/app/api/copilot/user-models/route.ts
index a0e8c65e11..4802a2ca8a 100644
--- a/apps/sim/app/api/copilot/user-models/route.ts
+++ b/apps/sim/app/api/copilot/user-models/route.ts
@@ -12,8 +12,14 @@ const DEFAULT_ENABLED_MODELS: Record<string, boolean> = {
   'gpt-4.1': false,
   'gpt-5-fast': false,
   'gpt-5': true,
-  'gpt-5-medium': true,
+  'gpt-5-medium': false,
   'gpt-5-high': false,
+  'gpt-5.1-fast': false,
+  'gpt-5.1': true,
+  'gpt-5.1-medium': true,
+  'gpt-5.1-high': false,
+  'gpt-5-codex': false,
+  'gpt-5.1-codex': true,
   o3: true,
   'claude-4-sonnet': false,
   'claude-4.5-haiku': true,
diff --git a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/copilot/components/user-input/constants.ts b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/copilot/components/user-input/constants.ts
index 8b45f58abd..d0fb71b4fa 100644
--- a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/copilot/components/user-input/constants.ts
+++ b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/copilot/components/user-input/constants.ts
@@ -20,16 +20,21 @@ export const MENTION_OPTIONS = [
  * Model configuration options
  */
 export const MODEL_OPTIONS = [
-  // { value: 'claude-4-sonnet', label: 'claude-4-sonnet' },
-  { value: 'claude-4.5-sonnet', label: 'claude-4.5-sonnet' },
-  { value: 'claude-4.5-haiku', label: 'claude-4.5-haiku' },
-  { value: 'claude-4.1-opus', label: 'claude-4.1-opus' },
-  // { value: 'gpt-5-fast', label: 'gpt-5-fast' },
-  // { value: 'gpt-5', label: 'gpt-5' },
-  { value: 'gpt-5-medium', label: 'gpt-5-medium' },
-  // { value: 'gpt-5-high', label: 'gpt-5-high' },
-  // { value: 'gpt-4o', label: 'gpt-4o' },
-  // { value: 'gpt-4.1', label: 'gpt-4.1' },
+  // { value: 'claude-4-sonnet', label: 'Claude 4 Sonnet' },
+  { value: 'claude-4.5-sonnet', label: 'Claude 4.5 Sonnet' },
+  { value: 'claude-4.5-haiku', label: 'Claude 4.5 Haiku' },
+  { value: 'claude-4.1-opus', label: 'Claude 4.1 Opus' },
+  // { value: 'gpt-5-fast', label: 'GPT 5 Fast' },
+  // { value: 'gpt-5', label: 'GPT 5' },
+  // { value: 'gpt-5.1-fast', label: 'GPT 5.1 Fast' },
+  // { value: 'gpt-5.1', label: 'GPT 5.1' },
+  { value: 'gpt-5.1-medium', label: 'GPT 5.1 Medium' },
+  // { value: 'gpt-5.1-high', label: 'GPT 5.1 High' },
+  // { value: 'gpt-5-codex', label: 'GPT 5 Codex' },
+  { value: 'gpt-5.1-codex', label: 'GPT 5.1 Codex' },
+  // { value: 'gpt-5-high', label: 'GPT 5 High' },
+  // { value: 'gpt-4o', label: 'GPT 4o' },
+  // { value: 'gpt-4.1', label: 'GPT 4.1' },
   { value: 'o3', label: 'o3' },
 ] as const
 
diff --git a/apps/sim/app/workspace/[workspaceId]/w/components/sidebar/components-new/settings-modal/components/copilot/copilot.tsx b/apps/sim/app/workspace/[workspaceId]/w/components/sidebar/components-new/settings-modal/components/copilot/copilot.tsx
index aa29006d26..a6f1c42922 100644
--- a/apps/sim/app/workspace/[workspaceId]/w/components/sidebar/components-new/settings-modal/components/copilot/copilot.tsx
+++ b/apps/sim/app/workspace/[workspaceId]/w/components/sidebar/components-new/settings-modal/components/copilot/copilot.tsx
@@ -32,11 +32,17 @@ const logger = createLogger('CopilotSettings')
 //   { value: 'gpt-4o', label: 'gpt-4o', icon: 'zap' },
 //   { value: 'gpt-4.1', label: 'gpt-4.1', icon: 'zap' },
 //   { value: 'gpt-5-fast', label: 'gpt-5-fast', icon: 'zap' },
+//   { value: 'gpt-5.1-fast', label: 'gpt-5.1-fast', icon: 'zap' },
 //   // Brain models
 //   { value: 'gpt-5', label: 'gpt-5', icon: 'brain' },
 //   { value: 'gpt-5-medium', label: 'gpt-5-medium', icon: 'brain' },
+//   { value: 'gpt-5.1', label: 'gpt-5.1', icon: 'brain' },
+//   { value: 'gpt-5.1-medium', label: 'gpt-5.1-medium', icon: 'brain' },
 //   // BrainCircuit models
 //   { value: 'gpt-5-high', label: 'gpt-5-high', icon: 'brainCircuit' },
+//   { value: 'gpt-5.1-high', label: 'gpt-5.1-high', icon: 'brainCircuit' },
+//   { value: 'gpt-5-codex', label: 'gpt-5-codex', icon: 'brainCircuit' },
+//   { value: 'gpt-5.1-codex', label: 'gpt-5.1-codex', icon: 'brainCircuit' },
 //   { value: 'o3', label: 'o3', icon: 'brainCircuit' },
 // ]
 
@@ -58,8 +64,14 @@ const logger = createLogger('CopilotSettings')
 //   'gpt-4.1': false,
 //   'gpt-5-fast': false,
 //   'gpt-5': true,
-//   'gpt-5-medium': true,
+//   'gpt-5-medium': false,
 //   'gpt-5-high': false,
+//   'gpt-5.1-fast': false,
+//   'gpt-5.1': true,
+//   'gpt-5.1-medium': true,
+//   'gpt-5.1-high': false,
+//   'gpt-5-codex': false,
+//   'gpt-5.1-codex': true,
 //   o3: true,
 //   'claude-4-sonnet': false,
 //   'claude-4.5-haiku': true,
diff --git a/apps/sim/lib/copilot/api.ts b/apps/sim/lib/copilot/api.ts
index 9a1dbf7fdb..eaeb9b5fcc 100644
--- a/apps/sim/lib/copilot/api.ts
+++ b/apps/sim/lib/copilot/api.ts
@@ -72,6 +72,12 @@ export interface SendMessageRequest {
     | 'gpt-5'
     | 'gpt-5-medium'
     | 'gpt-5-high'
+    | 'gpt-5.1-fast'
+    | 'gpt-5.1'
+    | 'gpt-5.1-medium'
+    | 'gpt-5.1-high'
+    | 'gpt-5-codex'
+    | 'gpt-5.1-codex'
     | 'gpt-4o'
     | 'gpt-4.1'
     | 'o3'
diff --git a/apps/sim/stores/panel/copilot/types.ts b/apps/sim/stores/panel/copilot/types.ts
index aa922c3a7a..db0a954eb5 100644
--- a/apps/sim/stores/panel/copilot/types.ts
+++ b/apps/sim/stores/panel/copilot/types.ts
@@ -66,6 +66,12 @@ export interface CopilotState {
     | 'gpt-5'
     | 'gpt-5-medium'
     | 'gpt-5-high'
+    | 'gpt-5.1-fast'
+    | 'gpt-5.1'
+    | 'gpt-5.1-medium'
+    | 'gpt-5.1-high'
+    | 'gpt-5-codex'
+    | 'gpt-5.1-codex'
     | 'gpt-4o'
     | 'gpt-4.1'
     | 'o3'