diff --git a/examples/samples/stream_all.py b/examples/samples/stream_all.py
new file mode 100644
index 00000000..491924f1
--- /dev/null
+++ b/examples/samples/stream_all.py
@@ -0,0 +1,44 @@
+"""Streaming across all available adapter"""
+
+import asyncio
+
+import ai
+
+MODELS: list[tuple[str, ai.Provider, str]] = [
+    ("ai_gateway", ai.ai_gateway, "anthropic/claude-sonnet-4.6"),
+    ("anthropic", ai.anthropic, "claude-sonnet-4-6"),
+    ("openai", ai.openai, "gpt-5.5"),
+]
+
+messages = [
+    ai.system_message("Be concise."),
+    ai.user_message("Explain why the sky is blue in two sentences."),
+]
+
+
+async def _run(name: str, provider: ai.Provider, model_id: str) -> None:
+    print(f"\n{name} / {model_id}")
+
+    if provider.client().api_key is None:
+        print(f"[SKIP] {provider.api_key_env} not set")
+        return
+
+    model = provider(model_id)
+
+    try:
+        async with ai.stream(model, messages) as s:
+            async for event in s:
+                if isinstance(event, ai.TextDelta):
+                    print(event.chunk, end="", flush=True)
+        print()
+    except Exception as exc:
+        print(f"[ERR] {type(exc).__name__}: {exc}")
+
+
+async def main() -> None:
+    for name, provider, model_id in MODELS:
+        await _run(name, provider, model_id)
+
+
+if __name__ == "__main__":
+    asyncio.run(main())
diff --git a/src/ai/models/anthropic/__init__.py b/src/ai/models/anthropic/__init__.py
index 659ce7c9..c99b6bfd 100644
--- a/src/ai/models/anthropic/__init__.py
+++ b/src/ai/models/anthropic/__init__.py
@@ -22,7 +22,7 @@
 if TYPE_CHECKING:
     pass
 
-_BASE_URL = "https://api.anthropic.com/v1"
+_BASE_URL = "https://api.anthropic.com"
 _API_KEY_ENV = "ANTHROPIC_API_KEY"
 _ANTHROPIC_VERSION = "2023-06-01"
 
@@ -83,7 +83,9 @@ async def list(self, *, client: client_.Client | None = None) -> list[str]:
             "x-api-key": c.api_key or "",
             "anthropic-version": _ANTHROPIC_VERSION,
         }
-        response = await c.http.get(f"{c.base_url.rstrip('/')}/models", headers=headers)
+        response = await c.http.get(
+            f"{c.base_url.rstrip('/')}/v1/models", headers=headers
+        )
         response.raise_for_status()
         data: list[dict[str, object]] = response.json().get("data", [])
         return sorted(str(m["id"]) for m in data)
diff --git a/src/ai/models/anthropic/check.py b/src/ai/models/anthropic/check.py
index 4b1fd2fd..2e7a4159 100644
--- a/src/ai/models/anthropic/check.py
+++ b/src/ai/models/anthropic/check.py
@@ -1,7 +1,7 @@
 """Anthropic connection check.
 
 Verifies that the client's credentials are valid and that the model
-exists on the Anthropic API by hitting ``GET /v1/models/{model_id}``.
+exists on the Anthropic API by hitting ``GET {base_url}/v1/models/{model_id}``.
 
 The ``anthropic-version`` header is added by the check function itself
 so that :class:`~ai.models.core.client.Client` stays provider-agnostic.
@@ -24,7 +24,7 @@ async def check(client: client_.Client, model: model_.Model) -> bool:
     """Return ``True`` if *client* can reach Anthropic and *model* exists."""
     if not client.api_key:
         return False
-    url = f"{client.base_url.rstrip('/')}/models/{model.id}"
+    url = f"{client.base_url.rstrip('/')}/v1/models/{model.id}"
     headers = {
         "x-api-key": client.api_key,
         "anthropic-version": _ANTHROPIC_VERSION,