diff --git a/packages/ai/src/api/openai-responses-shared.ts b/packages/ai/src/api/openai-responses-shared.ts
index 1b161578a..fbb11c225 100644
--- a/packages/ai/src/api/openai-responses-shared.ts
+++ b/packages/ai/src/api/openai-responses-shared.ts
@@ -563,7 +563,9 @@ export async function processResponsesStream<TApi extends Api>(
 			options.applyServiceTierPricing(output.usage, serviceTier);
 		}
 		// Map status to stop reason
-		output.stopReason = mapStopReason(response?.status);
+		const status = response?.status;
+		output.rawStopReason = status;
+		output.stopReason = mapStopReason(status);
 		if (output.content.some((b) => b.type === "toolCall") && output.stopReason === "stop") {
 			output.stopReason = "toolUse";
 		}
@@ -716,6 +718,7 @@ export async function processResponsesStream<TApi extends Api>(
 			throw new Error(`Error Code ${event.code}: ${event.message}` || "Unknown error");
 		} else if (event.type === "response.failed") {
 			sawTerminalResponseEvent = true;
+			output.rawStopReason = event.response?.status;
 			const error = event.response?.error;
 			const details = event.response?.incomplete_details;
 			const msg = error
diff --git a/packages/ai/test/openai-responses-terminal-event.test.ts b/packages/ai/test/openai-responses-terminal-event.test.ts
index fcc3cc522..2e02151e0 100644
--- a/packages/ai/test/openai-responses-terminal-event.test.ts
+++ b/packages/ai/test/openai-responses-terminal-event.test.ts
@@ -285,6 +285,7 @@ describe("OpenAI Responses terminal event handling", () => {
 
 		expect(output.responseId).toBe("resp_completed");
 		expect(output.stopReason).toBe("stop");
+		expect(output.rawStopReason).toBe("completed");
 		expect(output.usage).toMatchObject({
 			input: 15,
 			output: 7,
@@ -303,6 +304,7 @@ describe("OpenAI Responses terminal event handling", () => {
 
 		expect(output.responseId).toBe("resp_incomplete");
 		expect(output.stopReason).toBe("length");
+		expect(output.rawStopReason).toBe("incomplete");
 		expect(output.usage).toMatchObject({
 			input: 25,
 			output: 12,
@@ -320,5 +322,6 @@ describe("OpenAI Responses terminal event handling", () => {
 		await expect(processResponsesStream(createFailedEvents(), output, stream, model)).rejects.toThrow(
 			"server_error: boom",
 		);
+		expect(output.rawStopReason).toBe("failed");
 	});
 });