diff --git a/README.md b/README.md
index dcf61e2fa..8389fda2b 100644
--- a/README.md
+++ b/README.md
@@ -68,7 +68,8 @@
 * [valita](https://github.com/badrap/valita)
 * [Vality](https://github.com/jeengbe/vality)
 * [yup](https://github.com/jquense/yup)
-* [zod](https://github.com/vriad/zod)
+* [zod](https://github.com/colinhacks/zod)
+* [zod (v4)](https://github.com/colinhacks/zod/tree/v4)
 
 ## Criteria
 
diff --git a/cases/index.ts b/cases/index.ts
index c9e547624..a4a9ccc27 100644
--- a/cases/index.ts
+++ b/cases/index.ts
@@ -54,6 +54,7 @@ export const cases = [
   'vality',
   'yup',
   'zod',
+  'zod4',
   'deepkit',
   'effect-schema',
   'ts-auto-guard',
diff --git a/cases/zod4.ts b/cases/zod4.ts
new file mode 100644
index 000000000..15b2072d8
--- /dev/null
+++ b/cases/zod4.ts
@@ -0,0 +1,90 @@
+import * as z from 'zod4';
+import { createCase } from '../benchmarks';
+
+createCase('zod4', 'parseSafe', () => {
+  const dataType = z.interface({
+    number: z.number(),
+    negNumber: z.number(),
+    maxNumber: z.number(),
+    string: z.string(),
+    longString: z.string(),
+    boolean: z.boolean(),
+    deeplyNested: z.interface({
+      foo: z.string(),
+      num: z.number(),
+      bool: z.boolean(),
+    }),
+  });
+
+  return data => {
+    return dataType.parse(data);
+  };
+});
+
+createCase('zod4', 'parseStrict', () => {
+  const dataType = z
+    .interface({
+      number: z.number(),
+      negNumber: z.number(),
+      maxNumber: z.number(),
+      string: z.string(),
+      longString: z.string(),
+      boolean: z.boolean(),
+      deeplyNested: z
+        .interface({
+          foo: z.string(),
+          num: z.number(),
+          bool: z.boolean(),
+        })
+        .strict(),
+    })
+    .strict();
+
+  return data => {
+    return dataType.parse(data);
+  };
+});
+
+createCase('zod4', 'assertLoose', () => {
+  const dataType = z.looseInterface({
+    number: z.number(),
+    negNumber: z.number(),
+    maxNumber: z.number(),
+    string: z.string(),
+    longString: z.string(),
+    boolean: z.boolean(),
+    deeplyNested: z.looseInterface({
+      foo: z.string(),
+      num: z.number(),
+      bool: z.boolean(),
+    }),
+  });
+
+  return data => {
+    dataType.parse(data);
+
+    return true;
+  };
+});
+
+createCase('zod4', 'assertStrict', () => {
+  const dataType = z.strictInterface({
+    number: z.number(),
+    negNumber: z.number(),
+    maxNumber: z.number(),
+    string: z.string(),
+    longString: z.string(),
+    boolean: z.boolean(),
+    deeplyNested: z.strictInterface({
+      foo: z.string(),
+      num: z.number(),
+      bool: z.boolean(),
+    }),
+  });
+
+  return data => {
+    dataType.parse(data);
+
+    return true;
+  };
+});
diff --git a/package-lock.json b/package-lock.json
index 627fba27a..765df6a5c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -84,7 +84,8 @@
         "vega": "5.33.0",
         "vega-lite": "5.11.0",
         "yup": "1.6.1",
-        "zod": "3.24.2"
+        "zod": "3.24.2",
+        "zod4": "npm:zod@next"
       },
       "devDependencies": {
         "@babel/cli": "7.27.0",
@@ -3683,6 +3684,15 @@
       "resolved": "https://registry.npmjs.org/@zeit/schemas/-/schemas-2.36.0.tgz",
       "integrity": "sha512-7kjMwcChYEzMKjeex9ZFXkt1AyNov9R5HZtjBKVsmVpw7pa7ZtlCGvCBC2vnnXctaYN+aRI61HjIqeetZW5ROg=="
     },
+    "node_modules/@zod/core": {
+      "version": "0.3.3",
+      "resolved": "https://registry.npmjs.org/@zod/core/-/core-0.3.3.tgz",
+      "integrity": "sha512-zXp0/K9zynk8ZP5hdUN2i0xePJ6uULX5rvBC/54bWNF4FL9YHxTjQg/zPFNj+WE8g0QTKX+fty7n073bgp6wNw==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/colinhacks"
+      }
+    },
     "node_modules/accepts": {
       "version": "1.3.8",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
@@ -8748,9 +8758,9 @@
       "integrity": "sha512-8OwmbklUNzwezjGInmZ+2clQmExQPvomqjL7LFqOYqtmuxRgQYqOD3mHaU+MvZn5FLUeVxVfQjwLZW/n/JFuqg=="
     },
     "node_modules/semver": {
-      "version": "7.6.3",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-7.6.3.tgz",
-      "integrity": "sha512-oVekP1cKtI+CTDvHWYFUcMtsK/00wmAEfyqKfNdARm8u1wNVhSgaX7A8d4UuIlUI5e84iEwOhs7ZPYRmzU9U6A==",
+      "version": "7.7.1",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.7.1.tgz",
+      "integrity": "sha512-hlq8tAfn0m/61p4BVRcPzIGr6LKiMwo4VM6dGi6pt4qcRkmNzTcWq6eCEjEh+qXjkMDvPlOFFSGwQjoEa6gyMA==",
       "license": "ISC",
       "bin": {
         "semver": "bin/semver.js"
@@ -11209,6 +11219,20 @@
       "version": "3.24.2",
       "resolved": "https://registry.npmjs.org/zod/-/zod-3.24.2.tgz",
       "integrity": "sha512-lY7CDW43ECgW9u1TcT3IoXHflywfVqDYze4waEz812jR/bZ8FHDsl7pFQoSZTz5N+2NqRXs8GBwnAwo3ZNxqhQ==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/colinhacks"
+      }
+    },
+    "node_modules/zod4": {
+      "name": "zod",
+      "version": "4.0.0-beta.20250411T005215",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.0.0-beta.20250411T005215.tgz",
+      "integrity": "sha512-FgvuS7Gb0kzI9Rsd1ihOulGSFT9LVj0JdejbkvjXIski9F/DheDIBV9uZkbAIiS6bOsthAMWHFtSsM1o+hmhig==",
+      "license": "MIT",
+      "dependencies": {
+        "@zod/core": "0.3.3"
+      },
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }
@@ -13559,6 +13583,11 @@
       "resolved": "https://registry.npmjs.org/@zeit/schemas/-/schemas-2.36.0.tgz",
       "integrity": "sha512-7kjMwcChYEzMKjeex9ZFXkt1AyNov9R5HZtjBKVsmVpw7pa7ZtlCGvCBC2vnnXctaYN+aRI61HjIqeetZW5ROg=="
     },
+    "@zod/core": {
+      "version": "0.3.3",
+      "resolved": "https://registry.npmjs.org/@zod/core/-/core-0.3.3.tgz",
+      "integrity": "sha512-zXp0/K9zynk8ZP5hdUN2i0xePJ6uULX5rvBC/54bWNF4FL9YHxTjQg/zPFNj+WE8g0QTKX+fty7n073bgp6wNw=="
+    },
     "accepts": {
       "version": "1.3.8",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
@@ -17074,9 +17103,9 @@
       "integrity": "sha512-8OwmbklUNzwezjGInmZ+2clQmExQPvomqjL7LFqOYqtmuxRgQYqOD3mHaU+MvZn5FLUeVxVfQjwLZW/n/JFuqg=="
     },
     "semver": {
-      "version": "7.6.3",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-7.6.3.tgz",
-      "integrity": "sha512-oVekP1cKtI+CTDvHWYFUcMtsK/00wmAEfyqKfNdARm8u1wNVhSgaX7A8d4UuIlUI5e84iEwOhs7ZPYRmzU9U6A=="
+      "version": "7.7.1",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.7.1.tgz",
+      "integrity": "sha512-hlq8tAfn0m/61p4BVRcPzIGr6LKiMwo4VM6dGi6pt4qcRkmNzTcWq6eCEjEh+qXjkMDvPlOFFSGwQjoEa6gyMA=="
     },
     "serve": {
       "version": "14.2.4",
@@ -18809,6 +18838,14 @@
       "version": "3.24.2",
       "resolved": "https://registry.npmjs.org/zod/-/zod-3.24.2.tgz",
       "integrity": "sha512-lY7CDW43ECgW9u1TcT3IoXHflywfVqDYze4waEz812jR/bZ8FHDsl7pFQoSZTz5N+2NqRXs8GBwnAwo3ZNxqhQ=="
+    },
+    "zod4": {
+      "version": "npm:zod@4.0.0-beta.20250411T005215",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.0.0-beta.20250411T005215.tgz",
+      "integrity": "sha512-FgvuS7Gb0kzI9Rsd1ihOulGSFT9LVj0JdejbkvjXIski9F/DheDIBV9uZkbAIiS6bOsthAMWHFtSsM1o+hmhig==",
+      "requires": {
+        "@zod/core": "0.3.3"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index 70c81a173..e4ff10e0d 100644
--- a/package.json
+++ b/package.json
@@ -106,7 +106,8 @@
     "vega": "5.33.0",
     "vega-lite": "5.11.0",
     "yup": "1.6.1",
-    "zod": "3.24.2"
+    "zod": "3.24.2",
+    "zod4": "npm:zod@next"
   },
   "devDependencies": {
     "@babel/cli": "7.27.0",
diff --git a/test/benchmarks.test.ts b/test/benchmarks.test.ts
index acfe8bee7..02c9a0242 100644
--- a/test/benchmarks.test.ts
+++ b/test/benchmarks.test.ts
@@ -58,6 +58,7 @@ import '../cases/valita';
 import '../cases/vality';
 import '../cases/yup';
 import '../cases/zod';
+import '../cases/zod4';
 import '../cases/deepkit';
 import '../cases/effect-schema';
 import '../cases/ts-auto-guard';