diff --git a/litellm-init-models.sh b/litellm-init-models.sh
index 8f40eb2..e3be3f6 100755
--- a/litellm-init-models.sh
+++ b/litellm-init-models.sh
@@ -16,6 +16,13 @@ for m in data.get('data', []):
         print(m['model_name'])
 " 2>/dev/null)
 
+# Guard: skip entirely if already initialized (gpt-4o is a reliable sentinel).
+# Set FORCE=1 to bypass this check and add any missing models.
+if [ "${FORCE:-0}" != "1" ] && echo "$EXISTING" | grep -qx "gpt-4o"; then
+  echo "Models already registered in DB. Set FORCE=1 to add missing models."
+  exit 0
+fi
+
 add_model() {
   local model_name="$1"
   local litellm_model="$2"
@@ -103,6 +110,7 @@ add_model "gpt-5.1-codex-max"    "openai/gpt-5.1-codex-max"    "OPENAI_API_KEY"
 add_model "gpt-5.1-codex-mini"   "openai/gpt-5.1-codex-mini"   "OPENAI_API_KEY"
 add_model "gpt-5.2-codex"        "openai/gpt-5.2-codex"        "OPENAI_API_KEY"
 add_model "gpt-5.3-codex"        "openai/gpt-5.3-codex"        "OPENAI_API_KEY"
+add_model "gpt-5.4"              "openai/gpt-5.4"              "OPENAI_API_KEY"
 
 # Anthropic
 add_model "claude-opus-4-6"    "anthropic/claude-opus-4-6"           "ANTHROPIC_API_KEY"
@@ -132,8 +140,10 @@ add_model "gemini-pro-latest"        "gemini/gemini-pro-latest"        "GEMINI_A
 add_model "zai-glm-4.5"     "openai/glm-4.5"     "ZAI_API_KEY" "https://api.z.ai/api/coding/paas/v4"
 add_model "zai-glm-4.5-air" "openai/glm-4.5-air" "ZAI_API_KEY" "https://api.z.ai/api/coding/paas/v4"
 add_model "zai-glm-4.6"     "openai/glm-4.6"     "ZAI_API_KEY" "https://api.z.ai/api/coding/paas/v4"
-add_model "zai-glm-4.7"     "openai/glm-4.7"     "ZAI_API_KEY" "https://api.z.ai/api/coding/paas/v4"
-add_model "zai-glm-5"       "openai/glm-5"       "ZAI_API_KEY" "https://api.z.ai/api/coding/paas/v4"
+add_model "zai-glm-4.7"     "openai/glm-4.7"       "ZAI_API_KEY" "https://api.z.ai/api/coding/paas/v4"
+add_model "zai-glm-5"       "openai/glm-5"         "ZAI_API_KEY" "https://api.z.ai/api/coding/paas/v4"
+add_model "glm-4.7-flash"   "openai/glm-4.7-flash" "ZAI_API_KEY" "https://api.z.ai/api/coding/paas/v4"
+add_model "glm-5"           "openai/glm-5"         "ZAI_API_KEY" "https://api.z.ai/api/coding/paas/v4"
 
 # GitHub Copilot (token-file auth, no API key)
 add_copilot_model "copilot-gpt-4o"              "gpt-4o"