diff --git a/packages/ai/test/context-overflow.test.ts b/packages/ai/test/context-overflow.test.ts
index 721d69533..b121ede2d 100644
--- a/packages/ai/test/context-overflow.test.ts
+++ b/packages/ai/test/context-overflow.test.ts
@@ -540,8 +540,8 @@ describe("Context overflow error handling", () => {
 
 	describe.skipIf(!process.env.OPENROUTER_API_KEY)("OpenRouter", () => {
 		// Anthropic backend
-		it("anthropic/claude-sonnet-4 via OpenRouter - should detect overflow via isContextOverflow", async () => {
-			const model = getModel("openrouter", "anthropic/claude-sonnet-4");
+		it("anthropic/claude-sonnet-4.5 via OpenRouter - should detect overflow via isContextOverflow", async () => {
+			const model = getModel("openrouter", "anthropic/claude-sonnet-4.5");
 			const result = await testContextOverflow(model, process.env.OPENROUTER_API_KEY!);
 			logResult(result);
 
diff --git a/packages/ai/test/total-tokens.test.ts b/packages/ai/test/total-tokens.test.ts
index 33f8b99b9..23cb40270 100644
--- a/packages/ai/test/total-tokens.test.ts
+++ b/packages/ai/test/total-tokens.test.ts
@@ -707,10 +707,10 @@ describe("totalTokens field", () => {
 
 	describe.skipIf(!process.env.OPENROUTER_API_KEY)("OpenRouter", () => {
 		it(
-			"anthropic/claude-sonnet-4 - should return totalTokens equal to sum of components",
+			"anthropic/claude-sonnet-4.5 - should return totalTokens equal to sum of components",
 			{ retry: 3, timeout: 60000 },
 			async () => {
-				const llm = getModel("openrouter", "anthropic/claude-sonnet-4");
+				const llm = getModel("openrouter", "anthropic/claude-sonnet-4.5");
 
 				console.log(`\nOpenRouter / ${llm.id}:`);
 				const { first, second } = await testTotalTokensWithCache(llm, { apiKey: process.env.OPENROUTER_API_KEY });