diff --git a/CHANGELOG.md b/CHANGELOG.md
index b9f0c0f8..edb06165 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 All notable changes to `uipath_llm_client` (core package) will be documented in this file.
 
+## [1.18.0] - 2026-08-13
+
+### Changed
+- `PlatformBaseSettings.agenthub_config` now defaults to `codedagentsplayground` for design-time runs (local, Studio Web, or a debug session) instead of `None`, so coded-agent LLM calls draw the `CodedAgents.Playground` licensing pool. A deployed run — a real Orchestrator job that is neither a Studio Web project nor rooted to a debug session — still resolves to `None` (→ `AgentHub.LLM`). Callers that pass an explicit `agenthub_config` (low-code agents, evaluators via `get_chat_model(agenthub_config=...)`) override this default via `model_copy` and are unaffected; an explicit empty string is left as an opt-out. Setting `UIPATH_AGENTHUB_CONFIG` still wins over the computed default.
+- The design-time-vs-deployed decision uses the shared `resolve_coded_agenthub_config` helper from `uipath.platform` (bumped floor to `uipath-platform>=0.2.18`) so all coded frameworks (langchain / llamaindex / openai-agents) classify runs identically.
+
 ## [1.17.1] - 2026-07-17
 
 ### Added
diff --git a/packages/uipath_langchain_client/CHANGELOG.md b/packages/uipath_langchain_client/CHANGELOG.md
index 0e31b821..c4f2d2eb 100644
--- a/packages/uipath_langchain_client/CHANGELOG.md
+++ b/packages/uipath_langchain_client/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 All notable changes to `uipath_langchain_client` will be documented in this file.
 
+## [1.18.0] - 2026-08-13
+
+### Changed
+- Picks up core `uipath-llm-client` 1.18.0: directly-constructed chat/embedding clients now default `client_settings.agenthub_config` to `codedagentsplayground` for design-time runs (local / Studio Web / debug) so coded-agent LLM calls draw the `CodedAgents.Playground` pool; deployed runs stay `None` (→ `AgentHub.LLM`). Explicit `agenthub_config` (e.g. from low-code via `get_chat_model`) and `UIPATH_AGENTHUB_CONFIG` still take precedence. Bumped the `uipath-llm-client` floor to `>=1.18.0`.
+
 ## [1.17.1] - 2026-07-17
 
 ### Changed
diff --git a/packages/uipath_langchain_client/pyproject.toml b/packages/uipath_langchain_client/pyproject.toml
index b5b2cf28..4d5eadf8 100644
--- a/packages/uipath_langchain_client/pyproject.toml
+++ b/packages/uipath_langchain_client/pyproject.toml
@@ -6,7 +6,7 @@ readme = "README.md"
 requires-python = ">=3.11"
 dependencies = [
     "langchain>=1.2.15,<2.0.0",
-    "uipath-llm-client>=1.17.1,<2.0.0",
+    "uipath-llm-client>=1.18.0,<2.0.0",
 ]
 
 [project.optional-dependencies]
diff --git a/packages/uipath_langchain_client/src/uipath_langchain_client/__version__.py b/packages/uipath_langchain_client/src/uipath_langchain_client/__version__.py
index 618fd904..66e880d1 100644
--- a/packages/uipath_langchain_client/src/uipath_langchain_client/__version__.py
+++ b/packages/uipath_langchain_client/src/uipath_langchain_client/__version__.py
@@ -1,3 +1,3 @@
 __title__ = "UiPath LangChain Client"
 __description__ = "A Python client for interacting with UiPath's LLM services via LangChain."
-__version__ = "1.17.1"
+__version__ = "1.18.0"
diff --git a/pyproject.toml b/pyproject.toml
index 43511630..973df583 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ dependencies = [
     "tenacity>=9.1.4,<10.0.0",
     "pydantic>=2.12.5,<3.0.0",
     "pydantic-settings>=2.14.0,<3.0.0",
-    "uipath-platform>=0.1.91,<1.0.0",
+    "uipath-platform>=0.2.18,<1.0.0",
 ]
 
 authors = [
diff --git a/src/uipath/llm_client/__version__.py b/src/uipath/llm_client/__version__.py
index ca1169f8..d908879a 100644
--- a/src/uipath/llm_client/__version__.py
+++ b/src/uipath/llm_client/__version__.py
@@ -1,3 +1,3 @@
 __title__ = "UiPath LLM Client"
 __description__ = "A Python client for interacting with UiPath's LLM services."
-__version__ = "1.17.1"
+__version__ = "1.18.0"
diff --git a/src/uipath/llm_client/settings/platform/settings.py b/src/uipath/llm_client/settings/platform/settings.py
index 278dc810..d30bdf87 100644
--- a/src/uipath/llm_client/settings/platform/settings.py
+++ b/src/uipath/llm_client/settings/platform/settings.py
@@ -7,7 +7,11 @@
 from pydantic import Field, SecretStr, model_validator
 from typing_extensions import override
 from uipath.platform import UiPath
-from uipath.platform.common import EndpointManager, resolve_service_url
+from uipath.platform.common import (
+    EndpointManager,
+    resolve_coded_agenthub_config,
+    resolve_service_url,
+)
 from uipath.platform.common._config import UiPathConfig
 from uipath.platform.common.constants import (
     ENV_BASE_URL,
@@ -91,6 +95,28 @@ def validate_environment(self) -> Self:
             self.client_id = parsed_token_data.get("client_id")
         return self
 
+    @model_validator(mode="after")
+    def default_agenthub_config_for_design_time(self) -> Self:
+        """Default ``agenthub_config`` to the coded-agent playground marker at design time.
+
+        When no explicit ``agenthub_config`` was supplied (env ``UIPATH_AGENTHUB_CONFIG``
+        unset and no caller override), a design-time run — local, Studio Web, or a debug
+        session — sends ``codedagentsplayground`` so its LLM calls draw the
+        CodedAgents.Playground licensing pool. A deployed run keeps ``agenthub_config``
+        None, which the gateway resolves to AgentHub.LLM.
+
+        Callers that pass an explicit value — low-code agents and evaluators go through
+        ``get_chat_model(agenthub_config=...)``, which overrides via ``model_copy`` (that
+        does not re-run this validator) — are unaffected. An explicit empty string is left
+        as an intentional opt-out.
+
+        The design-time-vs-deployed decision is the shared ``resolve_coded_agenthub_config``
+        helper from ``uipath.platform`` so all coded frameworks classify runs identically.
+        """
+        if self.agenthub_config is None:
+            self.agenthub_config = resolve_coded_agenthub_config()
+        return self
+
     @staticmethod
     def _format_endpoint(endpoint: str, **kwargs: str | None) -> str:
         """Format an endpoint template, stripping query params with None values."""
diff --git a/tests/core/features/settings/test_platform.py b/tests/core/features/settings/test_platform.py
index e64cfbc9..48dae77b 100644
--- a/tests/core/features/settings/test_platform.py
+++ b/tests/core/features/settings/test_platform.py
@@ -91,18 +91,50 @@ def test_build_base_url_ignores_unrelated_service_override(
             assert "localhost" not in url
             assert "agenthub_/llm/api/chat/completions" in url
 
-    def test_build_auth_headers_omits_agenthub_config_by_default(
+    def test_build_auth_headers_omits_agenthub_config_when_deployed(
         self, platform_env_vars, mock_platform_auth
     ):
-        """``agenthub_config`` defaults to None and the header is omitted unless
-        the caller (or ``UIPATH_AGENTHUB_CONFIG``) sets it explicitly."""
+        """A deployed run (real job, not a Studio Web project, not a debug session)
+        keeps ``agenthub_config`` None, so the header is omitted -> AgentHub.LLM."""
+        env = {**platform_env_vars, "UIPATH_JOB_KEY": "deployed-job"}
+        with patch.dict(os.environ, env, clear=True):
+            settings = PlatformSettings()
+            assert settings.agenthub_config is None
+            headers = settings.build_auth_headers()
+            assert "x-uipath-agenthub-config" not in headers
+            assert headers["x-uipath-jobkey"] == "deployed-job"
+
+    def test_agenthub_config_defaults_to_coded_playground_at_design_time(
+        self, platform_env_vars, mock_platform_auth
+    ):
+        """A design-time run (no job key) defaults ``agenthub_config`` to the coded
+        playground marker so LLM calls draw the CodedAgents.Playground pool."""
         with patch.dict(os.environ, platform_env_vars, clear=True):
             settings = PlatformSettings()
+            assert settings.agenthub_config == "codedagentsplayground"
             headers = settings.build_auth_headers()
-            assert headers == {
-                "x-uipath-internal-accountid": "test-org-id",
-                "x-uipath-internal-tenantid": "test-tenant-id",
-            }
+            assert headers["x-uipath-agenthub-config"] == "codedagentsplayground"
+
+    def test_studio_web_run_is_design_time(self, platform_env_vars, mock_platform_auth):
+        """A Studio Web run (job key present but a studio project) is design-time,
+        not deployed -> coded playground marker."""
+        env = {
+            **platform_env_vars,
+            "UIPATH_JOB_KEY": "sw-debug-job",
+            "UIPATH_PROJECT_ID": "some-project-id",
+        }
+        with patch.dict(os.environ, env, clear=True):
+            settings = PlatformSettings()
+            assert settings.agenthub_config == "codedagentsplayground"
+
+    def test_explicit_agenthub_config_env_overrides_design_time_default(
+        self, platform_env_vars, mock_platform_auth
+    ):
+        """An explicit ``UIPATH_AGENTHUB_CONFIG`` wins over the design-time default."""
+        env = {**platform_env_vars, "UIPATH_AGENTHUB_CONFIG": "agentsplayground"}
+        with patch.dict(os.environ, env, clear=True):
+            settings = PlatformSettings()
+            assert settings.agenthub_config == "agentsplayground"
 
     def test_build_auth_headers_with_tracing(self, platform_env_vars, mock_platform_auth):
         """Test build_auth_headers includes tracing headers when set."""