diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2f96a73524..dff2c45041 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,18 @@
 
 ---
 
+## [2.5.7] - 2026-03-15
+
+> Media playground error handling fixes.
+
+### 🐛 Bug Fixes
+
+- **fix(media)**: Transcription "API Key Required" false positive when audio contains no speech (music, silence) — now shows "No speech detected" instead
+- **fix(media)**: `upstreamErrorResponse` in `audioTranscription.ts` and `audioSpeech.ts` now returns proper JSON (`{error:{message}}`), enabling correct 401/403 credential error detection in the MediaPageClient
+- **fix(media)**: `parseApiError` now handles Deepgram's `err_msg` field and detects `"api key"` in error messages for accurate credential error classification
+
+---
+
 ## [2.5.6] - 2026-03-15
 
 > Critical security/auth fixes: Antigravity OAuth broken + JWT sessions lost after restart.
diff --git a/docs/openapi.yaml b/docs/openapi.yaml
index 2bd493e5be..e9c7180d17 100644
--- a/docs/openapi.yaml
+++ b/docs/openapi.yaml
@@ -1,7 +1,7 @@
 openapi: 3.1.0
 info:
   title: OmniRoute API
-  version: 2.5.6
+  version: 2.5.7
   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 37c14eb91d..7ca95ed33c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "omniroute",
-  "version": "2.5.6",
+  "version": "2.5.7",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "omniroute",
-      "version": "2.5.6",
+      "version": "2.5.7",
       "hasInstallScript": true,
       "license": "MIT",
       "workspaces": [
diff --git a/package.json b/package.json
index ed8a27060b..1f4be005b7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "omniroute",
-  "version": "2.5.6",
+  "version": "2.5.7",
   "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": {