diff --git a/requirements.txt b/requirements.txt
index 18675c6..4fb8482 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
-streamlit>=1.61.1,<2.0
+streamlit>=1.64.0,<2.0
 streamlit-code-editor==0.1.22
-openai>=2.54.0,<3.0.0
-python-dotenv>=1.2.2,<2.0.0
+openai>=3.19.2,<4.0.0
+python-dotenv>=1.2.3,<2.0.0
 requests>=2.34.2,<3.0.0
-cmake>=4.4.2,<5.0
+cmake>=4.4.3,<5.0
 qrcode[pil]>=8.2,<9.0
diff --git a/tests/test_sdk_compatibility.py b/tests/test_sdk_compatibility.py
new file mode 100644
index 0000000..f2c9c86
--- /dev/null
+++ b/tests/test_sdk_compatibility.py
@@ -0,0 +1,48 @@
+"""Exercise the real installed SDK without keys, external requests or model costs."""
+
+import json
+
+import httpx2
+from openai import OpenAI
+
+from leettutor.llm_client import ChatDelta, LocalLLMClient, ProviderSettings
+
+
+def test_real_sdk_lists_models_and_parses_stream_without_network() -> None:
+    seen = []
+
+    def respond(request):
+        seen.append(request)
+        if request.url.path == "/v1/models":
+            return httpx2.Response(200, json={
+                "object": "list", "data": [{"id": "qa-model", "object": "model"}],
+            })
+        assert request.url.path == "/v1/chat/completions"
+        body = json.loads(request.content)
+        assert body["stream"] is True
+        assert body["max_tokens"] == 32
+        assert body["messages"] == [{"role": "user", "content": "hello"}]
+        chunk = {
+            "id": "qa", "object": "chat.completion.chunk", "created": 0,
+            "model": "qa-model", "choices": [{"index": 0,
+                "delta": {"content": "hello"}, "finish_reason": None}],
+        }
+        return httpx2.Response(200, headers={"content-type": "text/event-stream"},
+            content=f"data: {json.dumps(chunk)}\n\ndata: [DONE]\n\n")
+
+    transport = httpx2.MockTransport(respond)
+    sdk = OpenAI(api_key="qa-not-a-real-key", base_url="https://sdk-qa.invalid/v1",
+                 http_client=httpx2.Client(transport=transport), max_retries=0)
+    try:
+        adapter = LocalLLMClient(
+            ProviderSettings("LM Studio", "https://sdk-qa.invalid/v1"),
+            client_factory=lambda **kwargs: sdk,
+        )
+        assert adapter.list_models() == ["qa-model"]
+        assert list(adapter.stream_chat(
+            messages=[{"role": "user", "content": "hello"}], model="qa-model",
+            temperature=0.2, top_p=0.9, max_tokens=32,
+        )) == [ChatDelta("content", "hello")]
+        assert len(seen) == 2
+    finally:
+        sdk.close()