diff --git a/.changeset/polite-hairs-vanish.md b/.changeset/polite-hairs-vanish.md
new file mode 100644
index 0000000000..b2d6604638
--- /dev/null
+++ b/.changeset/polite-hairs-vanish.md
@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Added Neo X T4.
diff --git a/src/chains/definitions/neoxT4.ts b/src/chains/definitions/neoxT4.ts
new file mode 100644
index 0000000000..1dbff7c808
--- /dev/null
+++ b/src/chains/definitions/neoxT4.ts
@@ -0,0 +1,19 @@
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const neoxT4 = /*#__PURE__*/ defineChain({
+  id: 12227332,
+  name: 'Neo X Testnet T4',
+  nativeCurrency: { name: 'Gas', symbol: 'GAS', decimals: 18 },
+  rpcUrls: {
+    default: {
+      http: ['https://testnet.rpc.banelabs.org/'],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'neox-scan',
+      url: 'https://xt4scan.ngd.network',
+    },
+  },
+  testnet: true,
+})
diff --git a/src/chains/index.ts b/src/chains/index.ts
index 4ff241fed2..2c49a0dd94 100644
--- a/src/chains/index.ts
+++ b/src/chains/index.ts
@@ -291,6 +291,7 @@ export { nautilus } from './definitions/nautilus.js'
 export { neonDevnet } from './definitions/neonDevnet.js'
 export { neonMainnet } from './definitions/neonMainnet.js'
 export { neoxMainnet } from './definitions/neoxMainnet.js'
+export { neoxT4 } from './definitions/neoxT4.js'
 export { nexi } from './definitions/nexi.js'
 export { nexilix } from './definitions/nexilix.js'
 export { oasisTestnet } from './definitions/oasisTestnet.js'