diff --git a/src/web-server/models-dev/pricing-resolver.ts b/src/web-server/models-dev/pricing-resolver.ts
index daad1c92..08599e3c 100644
--- a/src/web-server/models-dev/pricing-resolver.ts
+++ b/src/web-server/models-dev/pricing-resolver.ts
@@ -91,6 +91,7 @@ function findModel(provider: ModelsDevProvider, model: string): ModelsDevModel |
 
   const normalizedEntries = new Map<string, ModelsDevModel>();
   for (const [key, value] of Object.entries(models)) {
+    if (!value || typeof value !== 'object') continue;
     normalizedEntries.set(normalizeId(key), value);
     if (typeof value.id === 'string') normalizedEntries.set(normalizeId(value.id), value);
   }
@@ -188,6 +189,7 @@ export function getKnownModelsDevModels(): string[] {
   const ids = new Set<string>();
   for (const provider of Object.values(registry)) {
     for (const model of Object.values(provider.models ?? {})) {
+      if (!model || typeof model !== 'object') continue;
       if (typeof model.id === 'string') ids.add(`${provider.id}/${model.id}`);
     }
   }
diff --git a/tests/unit/model-pricing.test.ts b/tests/unit/model-pricing.test.ts
index 779dfac9..b19e9f75 100644
--- a/tests/unit/model-pricing.test.ts
+++ b/tests/unit/model-pricing.test.ts
@@ -392,6 +392,26 @@ describe('model-pricing', () => {
       expect(pricing.outputPerMillion).toBe(0);
     });
 
+    it('ignores malformed models.dev entries during provider-aware lookups', () => {
+      setCachedModelsDevRegistry({
+        openai: {
+          id: 'openai',
+          name: 'OpenAI',
+          models: {
+            bad: null as unknown as never,
+            'gpt-4o': {
+              id: 'gpt-4o',
+              name: 'GPT-4o',
+              cost: { input: 2.5, output: 10 },
+            },
+          },
+        },
+      });
+
+      expect(() => getModelPricing('gpt-4o', { provider: 'openai' })).not.toThrow();
+      expect(getModelPricing('gpt-4o', { provider: 'openai' }).inputPerMillion).toBe(2.5);
+    });
+
     it('prefers provider-aware models.dev pricing over exact static table matches', () => {
       const pricing = getModelPricing('gpt-4o', { provider: 'github-copilot' });
       expect(pricing.inputPerMillion).toBe(0);