diff --git a/packages/ai/scripts/generate-models.ts b/packages/ai/scripts/generate-models.ts
index defae115..79d8a103 100644
--- a/packages/ai/scripts/generate-models.ts
+++ b/packages/ai/scripts/generate-models.ts
@@ -65,7 +65,22 @@ async function fetchOpenRouterModels(): Promise<NormalizedModel[]> {
 				modelKey = model.id.replace("openai/", "");
 			} else if (model.id.startsWith("anthropic/")) {
 				provider = "anthropic";
-				modelKey = model.id.replace("anthropic/", "");
+				const fullKey = model.id.replace("anthropic/", "");
+				// Map to Anthropic's preferred aliases
+				const anthropicAliases: Record<string, string> = {
+					"claude-opus-4.1": "claude-opus-4-1",
+					"claude-opus-4": "claude-opus-4-0", 
+					"claude-sonnet-4": "claude-sonnet-4-0",
+					"claude-3.7-sonnet": "claude-3-7-sonnet-latest",
+					"claude-3.7-sonnet:thinking": "claude-3-7-sonnet-latest:thinking",
+					"claude-3.5-haiku": "claude-3-5-haiku-latest",
+					"claude-3.5-haiku-20241022": "claude-3-5-haiku-latest",
+					"claude-3-haiku": "claude-3-haiku-20240307",
+					"claude-3-sonnet": "claude-3-sonnet-20240229",
+					"claude-3-opus": "claude-3-opus-20240229",
+					"claude-3.5-sonnet": "claude-3-5-sonnet-latest"
+				};
+				modelKey = anthropicAliases[fullKey] || fullKey;
 			} else if (model.id.startsWith("x-ai/")) {
 				provider = "xai";
 				modelKey = model.id.replace("x-ai/", "");
@@ -188,13 +203,17 @@ async function generateModels() {
 	// Combine models (models.dev takes priority for Groq/Cerebras)
 	const allModels = [...modelsDevModels, ...openRouterModels];
 
-	// Group by provider
-	const providers: Record<string, NormalizedModel[]> = {};
+	// Group by provider and deduplicate by model ID
+	const providers: Record<string, Record<string, NormalizedModel>> = {};
 	for (const model of allModels) {
 		if (!providers[model.provider]) {
-			providers[model.provider] = [];
+			providers[model.provider] = {};
+		}
+		// Use model ID as key to automatically deduplicate
+		// Only add if not already present (models.dev takes priority over OpenRouter)
+		if (!providers[model.provider][model.id]) {
+			providers[model.provider][model.id] = model;
 		}
-		providers[model.provider].push(model);
 	}
 
 	// Generate TypeScript file
@@ -211,7 +230,7 @@ export const PROVIDERS = {
 		output += `\t${providerId}: {\n`;
 		output += `\t\tmodels: {\n`;
 
-		for (const model of models) {
+		for (const model of Object.values(models)) {
 			output += `\t\t\t"${model.id}": {\n`;
 			output += `\t\t\t\tid: "${model.id}",\n`;
 			output += `\t\t\t\tname: "${model.name}",\n`;
@@ -254,7 +273,7 @@ export type ProviderModels = {
 	console.log(`  Reasoning-capable models: ${reasoningModels}`);
 
 	for (const [provider, models] of Object.entries(providers)) {
-		console.log(`  ${provider}: ${models.length} models`);
+		console.log(`  ${provider}: ${Object.keys(models).length} models`);
 	}
 }
 
diff --git a/packages/ai/src/models.generated.ts b/packages/ai/src/models.generated.ts
index 7eea62d9..e54feae8 100644
--- a/packages/ai/src/models.generated.ts
+++ b/packages/ai/src/models.generated.ts
@@ -2381,8 +2381,8 @@ export const PROVIDERS = {
 	},
 	anthropic: {
 		models: {
-			"claude-opus-4.1": {
-				id: "claude-opus-4.1",
+			"claude-opus-4-1": {
+				id: "claude-opus-4-1",
 				name: "Anthropic: Claude Opus 4.1",
 				provider: "anthropic",
 				reasoning: true,
@@ -2396,8 +2396,8 @@ export const PROVIDERS = {
 				contextWindow: 200000,
 				maxTokens: 32000,
 			} satisfies Model,
-			"claude-opus-4": {
-				id: "claude-opus-4",
+			"claude-opus-4-0": {
+				id: "claude-opus-4-0",
 				name: "Anthropic: Claude Opus 4",
 				provider: "anthropic",
 				reasoning: true,
@@ -2411,8 +2411,8 @@ export const PROVIDERS = {
 				contextWindow: 200000,
 				maxTokens: 32000,
 			} satisfies Model,
-			"claude-sonnet-4": {
-				id: "claude-sonnet-4",
+			"claude-sonnet-4-0": {
+				id: "claude-sonnet-4-0",
 				name: "Anthropic: Claude Sonnet 4",
 				provider: "anthropic",
 				reasoning: true,
@@ -2426,8 +2426,8 @@ export const PROVIDERS = {
 				contextWindow: 1000000,
 				maxTokens: 64000,
 			} satisfies Model,
-			"claude-3.7-sonnet": {
-				id: "claude-3.7-sonnet",
+			"claude-3-7-sonnet-latest": {
+				id: "claude-3-7-sonnet-latest",
 				name: "Anthropic: Claude 3.7 Sonnet",
 				provider: "anthropic",
 				reasoning: true,
@@ -2441,8 +2441,8 @@ export const PROVIDERS = {
 				contextWindow: 200000,
 				maxTokens: 64000,
 			} satisfies Model,
-			"claude-3.7-sonnet:thinking": {
-				id: "claude-3.7-sonnet:thinking",
+			"claude-3-7-sonnet-latest:thinking": {
+				id: "claude-3-7-sonnet-latest:thinking",
 				name: "Anthropic: Claude 3.7 Sonnet (thinking)",
 				provider: "anthropic",
 				reasoning: true,
@@ -2456,8 +2456,8 @@ export const PROVIDERS = {
 				contextWindow: 200000,
 				maxTokens: 64000,
 			} satisfies Model,
-			"claude-3.5-haiku-20241022": {
-				id: "claude-3.5-haiku-20241022",
+			"claude-3-5-haiku-latest": {
+				id: "claude-3-5-haiku-latest",
 				name: "Anthropic: Claude 3.5 Haiku (2024-10-22)",
 				provider: "anthropic",
 				reasoning: false,
@@ -2471,23 +2471,8 @@ export const PROVIDERS = {
 				contextWindow: 200000,
 				maxTokens: 8192,
 			} satisfies Model,
-			"claude-3.5-haiku": {
-				id: "claude-3.5-haiku",
-				name: "Anthropic: Claude 3.5 Haiku",
-				provider: "anthropic",
-				reasoning: false,
-				input: ["text", "image"],
-				cost: {
-					input: 0.7999999999999999,
-					output: 4,
-					cacheRead: 0.08,
-					cacheWrite: 1,
-				},
-				contextWindow: 200000,
-				maxTokens: 8192,
-			} satisfies Model,
-			"claude-3.5-sonnet": {
-				id: "claude-3.5-sonnet",
+			"claude-3-5-sonnet-latest": {
+				id: "claude-3-5-sonnet-latest",
 				name: "Anthropic: Claude 3.5 Sonnet",
 				provider: "anthropic",
 				reasoning: false,
@@ -2516,8 +2501,8 @@ export const PROVIDERS = {
 				contextWindow: 200000,
 				maxTokens: 8192,
 			} satisfies Model,
-			"claude-3-haiku": {
-				id: "claude-3-haiku",
+			"claude-3-haiku-20240307": {
+				id: "claude-3-haiku-20240307",
 				name: "Anthropic: Claude 3 Haiku",
 				provider: "anthropic",
 				reasoning: false,
@@ -2531,8 +2516,8 @@ export const PROVIDERS = {
 				contextWindow: 200000,
 				maxTokens: 4096,
 			} satisfies Model,
-			"claude-3-opus": {
-				id: "claude-3-opus",
+			"claude-3-opus-20240229": {
+				id: "claude-3-opus-20240229",
 				name: "Anthropic: Claude 3 Opus",
 				provider: "anthropic",
 				reasoning: false,
diff --git a/packages/ai/test/providers.test.ts b/packages/ai/test/providers.test.ts
index e312e0ce..25893c20 100644
--- a/packages/ai/test/providers.test.ts
+++ b/packages/ai/test/providers.test.ts
@@ -538,4 +538,32 @@ describe("AI Providers E2E Tests", () => {
             await multiTurn(llm, {reasoningEffort: "medium"});
         });
     });
+
+    describe.skipIf(!process.env.ANTHROPIC_API_KEY)("Anthropic Provider (Haiku 3.5)", () => {
+        let llm: AnthropicLLM;
+
+        beforeAll(() => {
+            llm = createLLM("anthropic", "claude-3-5-haiku-latest");
+        });
+
+        it("should complete basic text generation", async () => {
+            await basicTextGeneration(llm);
+        });
+
+        it("should handle tool calling", async () => {
+            await handleToolCall(llm);
+        });
+
+        it("should handle streaming", async () => {
+            await handleStreaming(llm);
+        });
+
+        it("should handle thinking mode", async () => {
+            await handleThinking(llm, {thinking: {enabled: true}}, false);
+        });
+
+        it("should handle multi-turn with thinking and tools", async () => {
+            await multiTurn(llm, {thinking: {enabled: true}});
+        });
+    });
 });
\ No newline at end of file