diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 403b19e..72277a2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,6 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
+        # subactor-subllm (the vision transport) requires Python 3.11+.
         python-version: ["3.11", "3.12"]
 
     steps:
diff --git a/README.md b/README.md
index 4c3cde4..761cf33 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 # NLP2CMD
 
-[![Python 3.10+](https://img.shields.io/badge/python-3.10+-blue.svg)](https://www.python.org/downloads/)
+[![Python 3.11+](https://img.shields.io/badge/python-3.11+-blue.svg)](https://www.python.org/downloads/)
 [![License: Apache-2.0](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 [![PyPI Version](https://img.shields.io/pypi/v/nlp2cmd.svg)](https://pypi.org/project/nlp2cmd/)
 [![1543+ Tests](https://img.shields.io/badge/tests-1543%2B-brightgreen.svg)](https://github.com/wronai/nlp2cmd)
diff --git a/docs/README.md b/docs/README.md
index 314eda9..0029fff 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -3451,7 +3451,7 @@ nlp2cmd/
 
 ## Requirements
 
-- Python >= >=3.10
+- Python >= 3.11
 - pyyaml >=6.0- pydantic >=2.0- rich >=13.0- click >=8.0- httpx >=0.25.0- jinja2 >=3.0- jsonschema >=4.0- python-dotenv >=1.0- watchdog >=3.0- numpy >=1.24.0- psutil >=5.9.0- rapidfuzz >=3.0
 
 ## Contributing
@@ -3488,4 +3488,4 @@ pytest
 | `CONTRIBUTING.md` | Contribution guidelines | [View](./CONTRIBUTING.md) |
 | `examples` | Usage examples and code samples | [View](./examples) |
 
-<!-- code2docs:end -->
\ No newline at end of file
+<!-- code2docs:end -->
diff --git a/pyproject.toml b/pyproject.toml
index 215d104..d88cc6f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ dependencies = [
     "psutil>=5.9.0",
     "rapidfuzz>=3.0",
     "nlp2cmd-intent>=0.1.2",
-    "subactor-subllm @ git+https://github.com/subactor/subllm.git@505d89f505e90c7b40d98cafdc9104cc61072460",
+    "subactor-subllm @ git+https://github.com/subactor/subllm.git@40726bb9399eb5cf9dfc038c1c948b7d2fbdca3b",
 ]
 
 [project.optional-dependencies]
@@ -253,7 +253,7 @@ ignore = [
 "tests/*" = ["S101"]
 
 [tool.mypy]
-python_version = "3.10"
+python_version = "3.11"
 warn_return_any = true
 warn_unused_configs = true
 disallow_untyped_defs = true
diff --git a/src/nlp2cmd/llm/openrouter.py b/src/nlp2cmd/llm/openrouter.py
index fb34122..d482277 100644
--- a/src/nlp2cmd/llm/openrouter.py
+++ b/src/nlp2cmd/llm/openrouter.py
@@ -22,9 +22,8 @@
 from typing import Any, Optional
 
 try:
-    from subllm import available_routes, complete as subllm_complete
+    from subllm import complete as subllm_complete
 except ImportError:
-    available_routes = None
     subllm_complete = None
 
 _DEBUG = os.environ.get("NLP2CMD_DEBUG", "").lower() in ("1", "true", "yes")
@@ -95,15 +94,8 @@ def __init__(
 
     @property
     def is_configured(self) -> bool:
-        """Check whether the central NLP2CMD route has a usable credential."""
-        if available_routes is None:
-            return False
-        credentials = {"OPENROUTER_API_KEY": self.api_key} if self.api_key else None
-        return bool(
-            available_routes(
-                "autogrammar-nlp2cmd", "generate", credentials=credentials
-            )
-        )
+        """Check whether the client can submit a request through SubLLM."""
+        return subllm_complete is not None and bool(self.api_key)
 
     def _headers(self) -> dict[str, str]:
         return {
@@ -190,6 +182,8 @@ async def vision(
         Returns:
             LLMResponse
         """
+        if subllm_complete is None:
+            return LLMResponse(success=False, error="subactor-subllm is not available")
         if not self.api_key:
             return LLMResponse(success=False, error="OPENROUTER_API_KEY not set")
 
@@ -207,14 +201,24 @@ async def vision(
             ],
         })
 
-        body: dict[str, Any] = {
-            "model": model or self.MODELS["vision"],
-            "messages": messages,
-            "max_tokens": max_tokens,
-            "temperature": temperature,
-        }
-
-        return await self._request(body)
+        credentials = {"openrouter": self.api_key}
+        try:
+            response = await asyncio.to_thread(
+                subllm_complete,
+                "autogrammar-nlp2cmd",
+                "vision",
+                messages,
+                timeout_seconds=self.timeout,
+                credentials=credentials,
+            )
+            return LLMResponse(
+                content=response.content,
+                model=response.model,
+                usage=dict(response.usage),
+                finish_reason=response.finish_reason,
+            )
+        except Exception as exc:
+            return LLMResponse(success=False, error=f"SubLLM vision request failed: {exc}")
 
     async def plan_actions(
         self,
diff --git a/tests/unit/test_subllm_client.py b/tests/unit/test_subllm_client.py
index 5fae81e..ae96934 100644
--- a/tests/unit/test_subllm_client.py
+++ b/tests/unit/test_subllm_client.py
@@ -21,3 +21,26 @@ def fake_complete(application, function, messages, **kwargs):
     assert response.model == "glm-5.3"
     assert captured["application"] == "autogrammar-nlp2cmd"
     assert captured["function"] == "generate"
+
+
+def test_vision_uses_central_subllm(monkeypatch):
+    captured = {}
+
+    def fake_complete(application, function, messages, **kwargs):
+        captured.update(application=application, function=function, messages=messages, kwargs=kwargs)
+        return type(
+            "Response",
+            (),
+            {"content": "cat", "model": "z-ai/glm-4.5v", "usage": {}, "finish_reason": "stop"},
+        )()
+
+    monkeypatch.setattr(openrouter, "subllm_complete", fake_complete)
+    response = asyncio.run(
+        openrouter.OpenRouterClient(api_key="test-key").vision("aaa", "what is this?")
+    )
+
+    assert response.content == "cat"
+    assert captured["application"] == "autogrammar-nlp2cmd"
+    assert captured["function"] == "vision"
+    assert captured["messages"][0]["content"][0]["type"] == "image_url"
+    assert captured["kwargs"]["credentials"] == {"openrouter": "test-key"}