diff --git a/.env.example b/.env.example
index 5e12477..d520e6f 100644
--- a/.env.example
+++ b/.env.example
@@ -23,4 +23,4 @@ VAPID_PUBLIC_KEY=
 
 # ── AI agent (optional in dev; Asistente won't work without it) ──────────────
 OPENAI_API_KEY=
-AGENT_MODEL=gpt-5.6-luna
+AGENT_MODEL=gpt-5.4-mini
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index e00d450..ab8377e 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -51,7 +51,7 @@ jobs:
           VAPID_PRIVATE_KEY=${{ secrets.VAPID_PRIVATE_KEY }}
           VAPID_PUBLIC_KEY=${{ secrets.VAPID_PUBLIC_KEY }}
           OPENAI_API_KEY=${{ secrets.OPENAI_API_KEY }}
-          AGENT_MODEL=gpt-5.6-luna
+          AGENT_MODEL=gpt-5.4-mini
           ENVEOF
           sed -i 's/^[[:space:]]*//' .env.prod
 
diff --git a/backend/app/config.py b/backend/app/config.py
index 216bad0..3b168f9 100644
--- a/backend/app/config.py
+++ b/backend/app/config.py
@@ -20,7 +20,7 @@ class Settings(BaseSettings):
     VAPID_PUBLIC_KEY: str = ""
     VAPID_CLAIM_EMAIL: str = "mailto:admin@wealth.cescalante.dev"
     OPENAI_API_KEY: str = ""
-    AGENT_MODEL: str = "gpt-5.6-luna"
+    AGENT_MODEL: str = "gpt-5.4-mini"
 
     @property
     def cors_origins_list(self) -> list[str]:
diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index c005bc8..38b14ce 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -31,7 +31,7 @@ services:
       VAPID_PRIVATE_KEY: ${VAPID_PRIVATE_KEY}
       VAPID_PUBLIC_KEY: ${VAPID_PUBLIC_KEY}
       OPENAI_API_KEY: ${OPENAI_API_KEY}
-      AGENT_MODEL: ${AGENT_MODEL:-gpt-5.6-luna}
+      AGENT_MODEL: ${AGENT_MODEL:-gpt-5.4-mini}
       # MAF 1.6+ enables OTel instrumentation by default; keep it off explicitly.
       ENABLE_INSTRUMENTATION: "false"
     expose:
diff --git a/docker-compose.yml b/docker-compose.yml
index be369a4..baf308c 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -30,7 +30,7 @@ services:
       VAPID_PRIVATE_KEY: ${VAPID_PRIVATE_KEY:-}
       VAPID_PUBLIC_KEY: ${VAPID_PUBLIC_KEY:-}
       OPENAI_API_KEY: ${OPENAI_API_KEY:-}
-      AGENT_MODEL: ${AGENT_MODEL:-gpt-5.6-luna}
+      AGENT_MODEL: ${AGENT_MODEL:-gpt-5.4-mini}
       # MAF 1.6+ enables OTel instrumentation by default; keep it off explicitly.
       ENABLE_INSTRUMENTATION: "false"
     ports: