diff --git a/.changeset/add-vcpus-flag.md b/.changeset/add-vcpus-flag.md
new file mode 100644
index 0000000..daf41b5
--- /dev/null
+++ b/.changeset/add-vcpus-flag.md
@@ -0,0 +1,5 @@
+---
+"sandbox": patch
+---
+
+Add `--vcpus` flag to `create` and `run` commands for configuring sandbox resources.
diff --git a/packages/sandbox/src/args/vcpus.ts b/packages/sandbox/src/args/vcpus.ts
new file mode 100644
index 0000000..0823bfb
--- /dev/null
+++ b/packages/sandbox/src/args/vcpus.ts
@@ -0,0 +1,20 @@
+import * as cmd from "cmd-ts";
+
+export const vcpus = cmd.option({
+  long: "vcpus",
+  type: cmd.optional(
+    cmd.extendType(cmd.number, {
+      displayName: "COUNT",
+      async from(n) {
+        if (!Number.isInteger(n) || n < 1) {
+          throw new Error(
+            `Invalid vCPU count: ${n}. Must be a positive integer.`,
+          );
+        }
+        return n;
+      },
+    }),
+  ),
+  description:
+    "Number of vCPUs to allocate (each vCPU includes 2048 MB of memory)",
+});
diff --git a/packages/sandbox/src/commands/create.ts b/packages/sandbox/src/commands/create.ts
index f45b846..635eeab 100644
--- a/packages/sandbox/src/commands/create.ts
+++ b/packages/sandbox/src/commands/create.ts
@@ -2,6 +2,7 @@ import * as cmd from "cmd-ts";
 import { runtime } from "../args/runtime";
 import ms from "ms";
 import { timeout } from "../args/timeout";
+import { vcpus } from "../args/vcpus";
 import chalk from "chalk";
 import { scope } from "../args/scope";
 import { sandboxClient } from "../client";
@@ -14,6 +15,7 @@ import { buildNetworkPolicy } from "../util/network-policy";
 export const args = {
   runtime,
   timeout,
+  vcpus,
   ports: cmd.multioption({
     long: "publish-port",
     short: "p",
@@ -70,6 +72,7 @@ export const create = cmd.command({
     scope,
     runtime,
     timeout,
+    vcpus,
     silent,
     snapshot,
     connect,
@@ -85,6 +88,7 @@ export const create = cmd.command({
       deniedCIDRs,
     });
 
+    const resources = vcpus ? { vcpus } : undefined;
     const spinner = silent ? undefined : ora("Creating sandbox...").start();
     const sandbox = snapshot
       ? await sandboxClient.create({
@@ -94,6 +98,7 @@ export const create = cmd.command({
           token: scope.token,
           ports,
           timeout: ms(timeout),
+          resources,
           networkPolicy,
           __interactive: true,
         })
@@ -104,6 +109,7 @@ export const create = cmd.command({
           ports,
           runtime,
           timeout: ms(timeout),
+          resources,
           networkPolicy,
           __interactive: true,
         });