Add StringableInference provider and update OpenaiTemplate for model retrieval

g4f/Provider/StringableInference.py

@@ -0,0 +1,31 @@
+from __future__ import annotations
+
+import secrets
+import string
+
+from .template import OpenaiTemplate
+
+class StringableInference(OpenaiTemplate):
+    label = "Stringable Inference"
+    url = "https://stringable-inference.onrender.com"
+    api_base = "https://stringableinf.com/api"
+    api_endpoint = "https://stringableinf.com/api/v1/chat/completions"
+
+    working = True
+    active_by_default = True
+    default_model = "deepseek-v3.2"
+    default_vision_model = "gpt-oss-120b"
+
+    @classmethod
+    def get_headers(cls, stream: bool, api_key: str = None, headers: dict = None) -> dict:
+        return {
+            "Accept": "text/event-stream" if stream else "application/json",
+            "Content-Type": "application/json",
+            "HTTP-Referer": "https://g4f.dev/",
+            "X-Title": "G4F Python",
+            **(
+                {"Authorization": f"Bearer {api_key}"}
+                if api_key else {}
+            ),
+            **({} if headers is None else headers)
+        }