diff --git a/nanobot/config/schema.py b/nanobot/config/schema.py
index e0a388b53..2012d3df1 100644
--- a/nanobot/config/schema.py
+++ b/nanobot/config/schema.py
@@ -533,6 +533,15 @@ class Config(BaseSettings):
                 continue
             p = getattr(self.providers, spec.name, None)
             if p and any(_kw_matches(kw) for kw in spec.keywords):
+                # Local providers (Ollama, vLLM, …) keep model-family keywords
+                # like "nemotron" or "llama" to enable bare-model auto-routing,
+                # but those keywords collide with cloud-hosted variants of the
+                # same family (e.g. `nvidia/nemotron-...` via OpenRouter). Only
+                # honor a local keyword match when the user has actually
+                # configured that local endpoint via `api_base` — mirrors the
+                # gate already used by the local-fallback loop below.
+                if spec.is_local and not p.api_base:
+                    continue
                 if spec.is_oauth or spec.is_local or spec.is_direct or p.api_key:
                     return p, spec.name
 
diff --git a/tests/cli/test_commands.py b/tests/cli/test_commands.py
index 5cee63135..647dbb166 100644
--- a/tests/cli/test_commands.py
+++ b/tests/cli/test_commands.py
@@ -1160,6 +1160,42 @@ def test_config_falls_back_to_vllm_when_ollama_not_configured():
     assert config.get_api_base() == "http://localhost:8000"
 
 
+def test_config_cloud_nemotron_is_not_hijacked_by_unconfigured_ollama():
+    """`nvidia/nemotron-*` via a gateway must not route to Ollama when no
+    Ollama endpoint is configured. Ollama keeps "nemotron" in its keywords
+    for bare-model auto-routing (PR #1863), which previously hijacked
+    cloud-hosted nemotron variants and silently sent traffic to
+    http://localhost:11434/v1."""
+    config = Config.model_validate(
+        {
+            "agents": {
+                "defaults": {
+                    "provider": "auto",
+                    "model": "nvidia/nemotron-3-super-120b-a12b",
+                }
+            },
+            "providers": {"openrouter": {"apiKey": "sk-or-test"}},
+        }
+    )
+
+    assert config.get_provider_name() == "openrouter"
+    assert config.get_api_base() == "https://openrouter.ai/api/v1"
+
+
+def test_config_bare_nemotron_still_auto_routes_to_configured_ollama():
+    """Preserves PR #1863 intent: when the user has actually configured an
+    Ollama endpoint, a bare nemotron model still auto-routes there."""
+    config = Config.model_validate(
+        {
+            "agents": {"defaults": {"provider": "auto", "model": "nemotron-3-nano"}},
+            "providers": {"ollama": {"apiBase": "http://localhost:11434/v1"}},
+        }
+    )
+
+    assert config.get_provider_name() == "ollama"
+    assert config.get_api_base() == "http://localhost:11434/v1"
+
+
 def test_openai_compat_provider_passes_model_through():
     from nanobot.providers.openai_compat_provider import OpenAICompatProvider