diff --git a/agent/auxiliary_client.py b/agent/auxiliary_client.py
index ef773f67ef..a39e09be33 100644
--- a/agent/auxiliary_client.py
+++ b/agent/auxiliary_client.py
@@ -654,10 +654,23 @@ def _try_anthropic() -> Tuple[Optional[Any], Optional[str]]:
     if not token:
         return None, None
 
+    # Allow base URL override from config.yaml model.base_url
+    base_url = _ANTHROPIC_DEFAULT_BASE_URL
+    try:
+        from hermes_cli.config import load_config
+        cfg = load_config()
+        model_cfg = cfg.get("model")
+        if isinstance(model_cfg, dict):
+            cfg_base_url = (model_cfg.get("base_url") or "").strip().rstrip("/")
+            if cfg_base_url:
+                base_url = cfg_base_url
+    except Exception:
+        pass
+
     model = _API_KEY_PROVIDER_AUX_MODELS.get("anthropic", "claude-haiku-4-5-20251001")
-    logger.debug("Auxiliary client: Anthropic native (%s)", model)
-    real_client = build_anthropic_client(token, _ANTHROPIC_DEFAULT_BASE_URL)
-    return AnthropicAuxiliaryClient(real_client, model, token, _ANTHROPIC_DEFAULT_BASE_URL), model
+    logger.debug("Auxiliary client: Anthropic native (%s) at %s", model, base_url)
+    real_client = build_anthropic_client(token, base_url)
+    return AnthropicAuxiliaryClient(real_client, model, token, base_url), model
 
 
 def _resolve_forced_provider(forced: str) -> Tuple[Optional[OpenAI], Optional[str]]:
diff --git a/hermes_cli/runtime_provider.py b/hermes_cli/runtime_provider.py
index 180dec0901..6bfa5ae8a6 100644
--- a/hermes_cli/runtime_provider.py
+++ b/hermes_cli/runtime_provider.py
@@ -313,10 +313,14 @@ def resolve_runtime_provider(
                 "No Anthropic credentials found. Set ANTHROPIC_TOKEN or ANTHROPIC_API_KEY, "
                 "run 'claude setup-token', or authenticate with 'claude /login'."
             )
+        # Allow base URL override from config.yaml model.base_url
+        model_cfg = _get_model_config()
+        cfg_base_url = (model_cfg.get("base_url") or "").strip().rstrip("/")
+        base_url = cfg_base_url or "https://api.anthropic.com"
         return {
             "provider": "anthropic",
             "api_mode": "anthropic_messages",
-            "base_url": "https://api.anthropic.com",
+            "base_url": base_url,
             "api_key": token,
             "source": "env",
             "requested_provider": requested_provider,