diff --git a/packages/ai/scripts/generate-models.ts b/packages/ai/scripts/generate-models.ts
index b7205881..225c89d6 100644
--- a/packages/ai/scripts/generate-models.ts
+++ b/packages/ai/scripts/generate-models.ts
@@ -1279,6 +1279,27 @@ async function generateModels() {
 		});
 	}
 
+	// Add missing Mistral Medium 3.5 model until models.dev includes it
+	if (!allModels.some(m => m.provider === "mistral" && m.id === "mistral-medium-3.5")) {
+		allModels.push({
+			id: "mistral-medium-3.5",
+			name: "Mistral Medium 3.5",
+			api: "mistral-conversations",
+			provider: "mistral",
+			baseUrl: "https://api.mistral.ai",
+			reasoning: true,
+			input: ["text", "image"],
+			cost: {
+				input: 1.5,
+				output: 7.5,
+				cacheRead: 0,
+				cacheWrite: 0,
+			},
+			contextWindow: 262144, // 256k tokens
+			maxTokens: 262144,
+		});
+	}
+
 	// Add "auto" alias for openrouter/auto
 	if (!allModels.some(m => m.provider === "openrouter" && m.id === "auto")) {
 		allModels.push({
diff --git a/packages/ai/src/models.generated.ts b/packages/ai/src/models.generated.ts
index 783a9487..a7082103 100644
--- a/packages/ai/src/models.generated.ts
+++ b/packages/ai/src/models.generated.ts
@@ -5822,6 +5822,23 @@ export const MODELS = {
 			contextWindow: 262144,
 			maxTokens: 262144,
 		} satisfies Model<"mistral-conversations">,
+		"mistral-medium-3.5": {
+			id: "mistral-medium-3.5",
+			name: "Mistral Medium 3.5",
+			api: "mistral-conversations",
+			provider: "mistral",
+			baseUrl: "https://api.mistral.ai",
+			reasoning: true,
+			input: ["text", "image"],
+			cost: {
+				input: 1.5,
+				output: 7.5,
+				cacheRead: 0,
+				cacheWrite: 0,
+			},
+			contextWindow: 262144,
+			maxTokens: 262144,
+		} satisfies Model<"mistral-conversations">,
 		"mistral-medium-latest": {
 			id: "mistral-medium-latest",
 			name: "Mistral Medium (latest)",
@@ -9423,23 +9440,6 @@ export const MODELS = {
 			contextWindow: 128000,
 			maxTokens: 16384,
 		} satisfies Model<"openai-completions">,
-		"mistralai/mistral-small-creative": {
-			id: "mistralai/mistral-small-creative",
-			name: "Mistral: Mistral Small Creative",
-			api: "openai-completions",
-			provider: "openrouter",
-			baseUrl: "https://openrouter.ai/api/v1",
-			reasoning: false,
-			input: ["text"],
-			cost: {
-				input: 0.09999999999999999,
-				output: 0.3,
-				cacheRead: 0.01,
-				cacheWrite: 0,
-			},
-			contextWindow: 32768,
-			maxTokens: 4096,
-		} satisfies Model<"openai-completions">,
 		"mistralai/mixtral-8x22b-instruct": {
 			id: "mistralai/mixtral-8x22b-instruct",
 			name: "Mistral: Mixtral 8x22B Instruct",
@@ -9585,13 +9585,13 @@ export const MODELS = {
 			reasoning: true,
 			input: ["text", "image"],
 			cost: {
-				input: 0.7448,
-				output: 4.655,
-				cacheRead: 0.1463,
+				input: 0.75,
+				output: 3.5,
+				cacheRead: 0.15,
 				cacheWrite: 0,
 			},
-			contextWindow: 256000,
-			maxTokens: 65536,
+			contextWindow: 262144,
+			maxTokens: 16384,
 		} satisfies Model<"openai-completions">,
 		"nex-agi/deepseek-v3.1-nex-n1": {
 			id: "nex-agi/deepseek-v3.1-nex-n1",
@@ -12339,13 +12339,13 @@ export const MODELS = {
 			reasoning: true,
 			input: ["text", "image"],
 			cost: {
-				input: 0.7448,
-				output: 4.655,
-				cacheRead: 0.1463,
+				input: 0.75,
+				output: 3.5,
+				cacheRead: 0.15,
 				cacheWrite: 0,
 			},
-			contextWindow: 256000,
-			maxTokens: 65536,
+			contextWindow: 262144,
+			maxTokens: 16384,
 		} satisfies Model<"openai-completions">,
 		"~openai/gpt-latest": {
 			id: "~openai/gpt-latest",
diff --git a/packages/ai/src/providers/mistral.ts b/packages/ai/src/providers/mistral.ts
index 68affc98..df3ef53b 100644
--- a/packages/ai/src/providers/mistral.ts
+++ b/packages/ai/src/providers/mistral.ts
@@ -587,7 +587,7 @@ function buildToolResultText(text: string, hasImages: boolean, supportsImages: b
 }
 
 function usesReasoningEffort(model: Model<"mistral-conversations">): boolean {
-	return model.id === "mistral-small-2603" || model.id === "mistral-small-latest";
+	return model.id === "mistral-small-2603" || model.id === "mistral-small-latest" || model.id === "mistral-medium-3.5";
 }
 
 function usesPromptModeReasoning(model: Model<"mistral-conversations">): boolean {
diff --git a/packages/ai/test/mistral-reasoning-mode.test.ts b/packages/ai/test/mistral-reasoning-mode.test.ts
index 2f1231d7..28ff5208 100644
--- a/packages/ai/test/mistral-reasoning-mode.test.ts
+++ b/packages/ai/test/mistral-reasoning-mode.test.ts
@@ -63,4 +63,18 @@ describe("Mistral reasoning mode selection", () => {
 		expect(payload.promptMode).toBe("reasoning");
 		expect(payload.reasoningEffort).toBeUndefined();
 	});
+
+	it("uses reasoning_effort for Mistral Medium 3.5", async () => {
+		const payload = await capturePayload(getModel("mistral", "mistral-medium-3.5"), { reasoning: "medium" });
+
+		expect(payload.reasoningEffort).toBe("high");
+		expect(payload.promptMode).toBeUndefined();
+	});
+
+	it("omits reasoning controls for Mistral Medium 3.5 when thinking is off", async () => {
+		const payload = await capturePayload(getModel("mistral", "mistral-medium-3.5"));
+
+		expect(payload.reasoningEffort).toBeUndefined();
+		expect(payload.promptMode).toBeUndefined();
+	});
 });