diff --git a/packages/ai/src/providers/openai-completions.ts b/packages/ai/src/providers/openai-completions.ts
index 019f1726..2518ea4a 100644
--- a/packages/ai/src/providers/openai-completions.ts
+++ b/packages/ai/src/providers/openai-completions.ts
@@ -167,7 +167,7 @@ export const streamOpenAICompletions: StreamFunction<"openai-completions", OpenA
 					calculateCost(model, output.usage);
 				}
 
-				const choice = chunk.choices[0];
+				const choice = chunk.choices?.[0];
 				if (!choice) continue;
 
 				if (choice.finish_reason) {
diff --git a/packages/ai/test/stream.test.ts b/packages/ai/test/stream.test.ts
index 3120b559..1582ca7d 100644
--- a/packages/ai/test/stream.test.ts
+++ b/packages/ai/test/stream.test.ts
@@ -737,32 +737,8 @@ describe("Generate E2E Tests", () => {
 		},
 	);
 
-	describe.skipIf(!process.env.ZAI_API_KEY)("zAI Provider (glm-4.5-air via OpenAI Completions)", () => {
-		const llm = getModel("zai", "glm-4.5-air");
-
-		it("should complete basic text generation", { retry: 3 }, async () => {
-			await basicTextGeneration(llm);
-		});
-
-		it("should handle tool calling", { retry: 3 }, async () => {
-			await handleToolCall(llm);
-		});
-
-		it("should handle streaming", { retry: 3 }, async () => {
-			await handleStreaming(llm);
-		});
-
-		it.skip("should handle thinking mode", { retry: 3 }, async () => {
-			await handleThinking(llm, { reasoningEffort: "medium" });
-		});
-
-		it("should handle multi-turn with thinking and tools", { retry: 3 }, async () => {
-			await multiTurn(llm, { reasoningEffort: "medium" });
-		});
-	});
-
-	describe.skipIf(!process.env.ZAI_API_KEY)("zAI Provider (glm-4.5v via OpenAI Completions)", () => {
-		const llm = getModel("zai", "glm-4.5v");
+	describe.skipIf(!process.env.ZAI_API_KEY)("zAI Provider (glm-5 via OpenAI Completions)", () => {
+		const llm = getModel("zai", "glm-5");
 
 		it("should complete basic text generation", { retry: 3 }, async () => {
 			await basicTextGeneration(llm);