diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index bf0d0361..f391d416 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "3.5.0"
+  ".": "3.6.0"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d8e8b1d5..b8cc8f24 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Changelog
 
+## 3.6.0 (2025-10-16)
+
+Full Changelog: [v3.5.0...v3.6.0](https://github.com/digitalocean/gradient-python/compare/v3.5.0...v3.6.0)
+
+### Features
+
+* **api:** manual updates ([da88e9e](https://github.com/digitalocean/gradient-python/commit/da88e9eee0adc6152d0d8212305397483be0d686))
+
+
+### Bug Fixes
+
+* lints ([a1b1fc6](https://github.com/digitalocean/gradient-python/commit/a1b1fc6b7747c00d9bfc2b86c6262e9c123416dc))
+* test setup needs all three access keys ([01ac735](https://github.com/digitalocean/gradient-python/commit/01ac735fb965686699df82ec8763b18ceb660972))
+
 ## 3.5.0 (2025-10-14)
 
 Full Changelog: [v3.4.0...v3.5.0](https://github.com/digitalocean/gradient-python/compare/v3.4.0...v3.5.0)
diff --git a/pyproject.toml b/pyproject.toml
index b9dbc5ea..0eb040eb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "gradient"
-version = "3.5.0"
+version = "3.6.0"
 description = "The official Python library for the Gradient API"
 dynamic = ["readme"]
 license = "Apache-2.0"
diff --git a/src/gradient/_client.py b/src/gradient/_client.py
index 77cc446e..58bc42d9 100644
--- a/src/gradient/_client.py
+++ b/src/gradient/_client.py
@@ -291,6 +291,16 @@ def _validate_headers(self, headers: Headers, custom_headers: Headers) -> None:
         if isinstance(custom_headers.get("Authorization"), Omit):
             return
 
+        if self.model_access_key and headers.get("Authorization"):
+            return
+        if isinstance(custom_headers.get("Authorization"), Omit):
+            return
+
+        if self.agent_access_key and headers.get("Authorization"):
+            return
+        if isinstance(custom_headers.get("Authorization"), Omit):
+            return
+
         raise TypeError(
             '"Could not resolve authentication method. Expected access_token, agent_access_key, or model_access_key to be set. Or for the `Authorization` headers to be explicitly omitted"'
         )
@@ -614,6 +624,16 @@ def _validate_headers(self, headers: Headers, custom_headers: Headers) -> None:
         if isinstance(custom_headers.get("Authorization"), Omit):
             return
 
+        if self.model_access_key and headers.get("Authorization"):
+            return
+        if isinstance(custom_headers.get("Authorization"), Omit):
+            return
+
+        if self.agent_access_key and headers.get("Authorization"):
+            return
+        if isinstance(custom_headers.get("Authorization"), Omit):
+            return
+
         raise TypeError(
             '"Could not resolve authentication method. Expected access_token, agent_access_key, or model_access_key to be set. Or for the `Authorization` headers to be explicitly omitted"'
         )
diff --git a/src/gradient/_version.py b/src/gradient/_version.py
index 68c981bc..0190d688 100644
--- a/src/gradient/_version.py
+++ b/src/gradient/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "gradient"
-__version__ = "3.5.0"  # x-release-please-version
+__version__ = "3.6.0"  # x-release-please-version
diff --git a/tests/conftest.py b/tests/conftest.py
index bc2aa92e..3915c92b 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -14,7 +14,9 @@
 from gradient._utils import is_dict
 
 if TYPE_CHECKING:
-    from _pytest.fixtures import FixtureRequest  # pyright: ignore[reportPrivateImportUsage]
+    from _pytest.fixtures import (
+        FixtureRequest,  # pyright: ignore[reportPrivateImportUsage]
+    )
 
 pytest.register_assert_rewrite("tests.utils")