diff --git a/packages/actions/src/prepare-request-body.spec.ts b/packages/actions/src/prepare-request-body.spec.ts
index f0acbdb36b..9acab2fb54 100644
--- a/packages/actions/src/prepare-request-body.spec.ts
+++ b/packages/actions/src/prepare-request-body.spec.ts
@@ -662,6 +662,62 @@ describe("prepareRequestBody - Google AI Studio", () => {
 	});
 });
 
+describe("prepareRequestBody - Alibaba", () => {
+	test("should enable thinking for Alibaba DeepSeek v3.2 when reasoning is requested", async () => {
+		const requestBody = (await prepareRequestBody(
+			"alibaba",
+			"deepseek-v3.2",
+			[{ role: "user", content: "Solve this carefully" }],
+			false,
+			undefined,
+			undefined,
+			undefined,
+			undefined,
+			undefined,
+			undefined,
+			undefined,
+			undefined,
+			"medium",
+			true,
+			false,
+		)) as unknown as {
+			enable_thinking?: boolean;
+			thinking_budget?: number;
+			reasoning_effort?: string;
+		};
+
+		expect(requestBody.enable_thinking).toBe(true);
+		expect(requestBody.thinking_budget).toBe(8192);
+		expect(requestBody).not.toHaveProperty("reasoning_effort");
+	});
+
+	test("should preserve reasoning_effort for non-DeepSeek Alibaba models", async () => {
+		const requestBody = (await prepareRequestBody(
+			"alibaba",
+			"qwen3-vl-235b-a22b-thinking",
+			[{ role: "user", content: "Solve this carefully" }],
+			false,
+			undefined,
+			undefined,
+			undefined,
+			undefined,
+			undefined,
+			undefined,
+			undefined,
+			undefined,
+			"high",
+			true,
+			false,
+		)) as unknown as {
+			enable_thinking?: boolean;
+			reasoning_effort?: string;
+		};
+
+		expect(requestBody.reasoning_effort).toBe("high");
+		expect(requestBody).not.toHaveProperty("enable_thinking");
+	});
+});
+
 describe("prepareRequestBody - AWS Bedrock", () => {
 	test("should sanitize complex tool schemas for Bedrock Converse", async () => {
 		const requestBody = (await prepareRequestBody(
diff --git a/packages/actions/src/prepare-request-body.ts b/packages/actions/src/prepare-request-body.ts
index 08ee36e262..aa6e3234fd 100644
--- a/packages/actions/src/prepare-request-body.ts
+++ b/packages/actions/src/prepare-request-body.ts
@@ -1878,6 +1878,65 @@ export async function prepareRequestBody(
 			}
 			break;
 		}
+		case "alibaba": {
+			if (stream) {
+				requestBody.stream_options = {
+					include_usage: true,
+				};
+			}
+			if (response_format) {
+				requestBody.response_format = response_format;
+			}
+
+			if (temperature !== undefined) {
+				requestBody.temperature = temperature;
+			}
+			if (max_tokens !== undefined) {
+				requestBody.max_tokens = max_tokens;
+			}
+			if (top_p !== undefined) {
+				requestBody.top_p = top_p;
+			}
+			if (frequency_penalty !== undefined) {
+				requestBody.frequency_penalty = frequency_penalty;
+			}
+			if (presence_penalty !== undefined) {
+				requestBody.presence_penalty = presence_penalty;
+			}
+
+			if (
+				usedModel === "deepseek-v3.2" &&
+				supportsReasoning &&
+				(reasoning_effort !== undefined || reasoning_max_tokens !== undefined)
+			) {
+				requestBody.enable_thinking = true;
+
+				if (reasoning_max_tokens !== undefined) {
+					requestBody.thinking_budget = Math.min(reasoning_max_tokens, 32768);
+				} else if (reasoning_effort !== undefined) {
+					const getThinkingBudget = (effort: string) => {
+						switch (effort) {
+							case "minimal":
+								return 512;
+							case "low":
+								return 2048;
+							case "high":
+								return 24576;
+							case "xhigh":
+								return 32768;
+							case "medium":
+							default:
+								return 8192;
+						}
+					};
+
+					requestBody.thinking_budget = getThinkingBudget(reasoning_effort);
+				}
+			} else if (reasoning_effort !== undefined) {
+				requestBody.reasoning_effort = reasoning_effort;
+			}
+			break;
+		}
 		default: {
 			if (stream) {
 				requestBody.stream_options = {
diff --git a/packages/models/src/models/deepseek.ts b/packages/models/src/models/deepseek.ts
index 0a7078b7d4..8302c5d450 100644
--- a/packages/models/src/models/deepseek.ts
+++ b/packages/models/src/models/deepseek.ts
@@ -186,7 +186,7 @@ export const deepseekModels = [
 				requestPrice: 0,
 				contextSize: 131072,
 				maxOutput: 65536,
-				reasoning: false,
+				reasoning: true,
 				streaming: true,
 				vision: false,
 				tools: true,