diff --git a/CHANGELOG.md b/CHANGELOG.md
index c99796ca43..18c3496c11 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,16 @@
 
 ---
 
+## [3.0.0-rc.4] - 2026-03-22
+
+### ✨ New Features
+
+- **#530 (PR)** — OpenCode Zen and OpenCode Go providers added (by @kang-heewon)
+  - New `OpencodeExecutor` with multi-format routing (`/chat/completions`, `/messages`, `/responses`)
+  - 7 models across both tiers
+
+---
+
 ## [3.0.0-rc.3] - 2026-03-22
 
 ### ✨ New Features
diff --git a/docs/openapi.yaml b/docs/openapi.yaml
index 59cf603c1d..4d2c52ed11 100644
--- a/docs/openapi.yaml
+++ b/docs/openapi.yaml
@@ -1,7 +1,7 @@
 openapi: 3.1.0
 info:
   title: OmniRoute API
-  version: 3.0.0-rc.3
+  version: 3.0.0-rc.4
   description: |
     OmniRoute is a local-first AI API proxy router. It provides an OpenAI-compatible
     endpoint that routes requests to multiple AI providers with load balancing,
diff --git a/package-lock.json b/package-lock.json
index f8a533c96a..f02ea1b1f4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "omniroute",
-  "version": "3.0.0-rc.3",
+  "version": "3.0.0-rc.4",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "omniroute",
-      "version": "3.0.0-rc.3",
+      "version": "3.0.0-rc.4",
       "hasInstallScript": true,
       "license": "MIT",
       "workspaces": [
diff --git a/package.json b/package.json
index 971b7e0f23..008d424519 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "omniroute",
-  "version": "3.0.0-rc.3",
+  "version": "3.0.0-rc.4",
   "description": "Smart AI Router with auto fallback — route to FREE & cheap models, zero downtime. Works with Cursor, Cline, Claude Desktop, Codex, and any OpenAI-compatible tool.",
   "type": "module",
   "bin": {