diff --git a/code_review_request.md b/code_review_request.md
new file mode 100644
index 00000000..35690a07
--- /dev/null
+++ b/code_review_request.md
@@ -0,0 +1,15 @@
+# Code Review Request: Update xAI Model to Grok 4.3
+
+## Changes:
+1. Updated `lib/utils/index.ts`:
+   - Replaced `Grok 4.2` with `Grok 4.3` in switch cases and error messages.
+   - Updated model identifier from `grok-4-fast-non-reasoning` to `grok-latest`.
+2. Updated `components/settings/components/settings.tsx`:
+   - Updated default `selectedModel` to `Grok 4.3`.
+3. Updated `components/settings/components/model-selection-form.tsx`:
+   - Updated `models` array entries from `Grok 4.2` to `Grok 4.3`.
+
+## Verification:
+- Targetted unit tests in `lib/utils/index.test.ts` pass.
+- Syntax verification using `bun build` for all modified files.
+- Verified no remaining occurrences of old model strings.
diff --git a/components/settings/components/model-selection-form.tsx b/components/settings/components/model-selection-form.tsx
index 148ba85a..bae03dc2 100644
--- a/components/settings/components/model-selection-form.tsx
+++ b/components/settings/components/model-selection-form.tsx
@@ -35,8 +35,8 @@ const models = [
     badgeVariant: "default" as const,
   },
   {
-    id: "Grok 4.2",
-    name: "Grok 4.2",
+    id: "Grok 4.3",
+    name: "Grok 4.3",
     description: "The latest from xAI, pushing the boundaries of reasoning and problem-solving.",
     icon: Rocket,
     badge: "New",
diff --git a/components/settings/components/settings.tsx b/components/settings/components/settings.tsx
index 7a526e18..d5db12a4 100644
--- a/components/settings/components/settings.tsx
+++ b/components/settings/components/settings.tsx
@@ -54,7 +54,7 @@ export type SettingsFormValues = z.infer<typeof settingsFormSchema>
 const defaultValues: Partial<SettingsFormValues> = {
   systemPrompt:
     "You are a planetary copilot, an AI assistant designed to help users with information about planets, space exploration, and astronomy. Provide accurate, educational, and engaging responses about our solar system and beyond.",
-  selectedModel: "Grok 4.2",
+  selectedModel: "Grok 4.3",
   users: [],
 }
 
diff --git a/lib/utils/index.ts b/lib/utils/index.ts
index 5303da34..ee31399d 100644
--- a/lib/utils/index.ts
+++ b/lib/utils/index.ts
@@ -34,20 +34,20 @@ export async function getModel(requireVision: boolean = false) {
 
   if (selectedModel) {
     switch (selectedModel) {
-      case 'Grok 4.2':
+      case 'Grok 4.3':
         if (xaiApiKey) {
           const xai = createXai({
             apiKey: xaiApiKey,
             baseURL: 'https://api.x.ai/v1',
           });
           try {
-            return xai('grok-4-fast-non-reasoning');
+            return xai('grok-latest');
           } catch (error) {
-            console.error('Selected model "Grok 4.2" is configured but failed to initialize.', error);
+            console.error('Selected model "Grok 4.3" is configured but failed to initialize.', error);
             throw new Error('Failed to initialize selected model.');
           }
         } else {
-            console.error('User selected "Grok 4.2" but XAI_API_KEY is not set.');
+            console.error('User selected "Grok 4.3" but XAI_API_KEY is not set.');
             throw new Error('Selected model is not configured.');
         }
       case 'Gemini 3':
@@ -85,7 +85,7 @@ export async function getModel(requireVision: boolean = false) {
       baseURL: 'https://api.x.ai/v1',
     });
     try {
-      return xai('grok-4-fast-non-reasoning');
+      return xai('grok-latest');
     } catch (error) {
       console.warn('xAI API unavailable, falling back to next provider:');
     }