diff --git a/.env.example b/.env.example
index b7f3b008faf2..5d11cb666b03 100644
--- a/.env.example
+++ b/.env.example
@@ -124,6 +124,14 @@
 # Optional base URL override:
 # XIAOMI_BASE_URL=https://api.xiaomimimo.com/v1
 
+# =============================================================================
+# LLM PROVIDER (Yandex AI Studio)
+# =============================================================================
+# Yandex Cloud Model Gallery — OpenAI-compatible LLM API.
+# Get credentials at: https://aistudio.yandex.ru/
+# YANDEX_API_KEY=your_key_here
+# YANDEX_FOLDER_ID=your_folder_id_here
+
 # =============================================================================
 # TOOL API KEYS
 # =============================================================================
diff --git a/cli-config.yaml.example b/cli-config.yaml.example
index fb6912642ae9..891491abc1e8 100644
--- a/cli-config.yaml.example
+++ b/cli-config.yaml.example
@@ -26,6 +26,7 @@ model:
   #   "huggingface"  - Hugging Face Inference (requires: HF_TOKEN)
   #   "nvidia"       - NVIDIA NIM / build.nvidia.com (requires: NVIDIA_API_KEY)
   #   "xiaomi"       - Xiaomi MiMo (requires: XIAOMI_API_KEY)
+  #   "yandex"       - Yandex AI Studio (requires: YANDEX_API_KEY, YANDEX_FOLDER_ID)
   #   "arcee"        - Arcee AI Trinity models (requires: ARCEEAI_API_KEY)
   #   "ollama-cloud" - Ollama Cloud (requires: OLLAMA_API_KEY — https://ollama.com/settings)
   #   "kilocode"     - KiloCode gateway (requires: KILOCODE_API_KEY)
diff --git a/hermes_cli/model_normalize.py b/hermes_cli/model_normalize.py
index d7f8f3ea22ea..81193ec72ded 100644
--- a/hermes_cli/model_normalize.py
+++ b/hermes_cli/model_normalize.py
@@ -462,6 +462,12 @@ def normalize_model_for_provider(model_input: str, target_provider: str) -> str:
     if provider in _AUTHORITATIVE_NATIVE_PROVIDERS:
         return name
 
+    # --- Yandex AI Studio: gpt://<folder>/<model> URIs ---
+    if provider == "yandex":
+        from plugins.model_providers.yandex import normalize_yandex_model
+
+        return normalize_yandex_model(name)
+
     # --- Custom & all others: pass through as-is ---
     return name
 
diff --git a/plugins/model-providers/yandex/__init__.py b/plugins/model-providers/yandex/__init__.py
new file mode 100644
index 000000000000..b35dec1e6d52
--- /dev/null
+++ b/plugins/model-providers/yandex/__init__.py
@@ -0,0 +1,105 @@
+"""Yandex Cloud AI Studio provider profile."""
+
+from __future__ import annotations
+
+import json
+import os
+import urllib.request
+from typing import Any
+
+from providers import register_provider
+from providers.base import ProviderProfile, _profile_user_agent
+
+_BASE_URL = "https://llm.api.cloud.yandex.net/v1"
+_DEFAULT_MODEL = "deepseek-v4-flash/latest"
+
+
+def _folder_id() -> str:
+    return os.environ.get("YANDEX_FOLDER_ID", "").strip().strip('"').strip("'")
+
+
+def normalize_yandex_model(model_input: str) -> str:
+    """Resolve a config/user model id to a Yandex ``gpt://`` URI."""
+    folder_id = _folder_id()
+    name = (model_input or "").strip()
+    if not name:
+        return name
+    if "${YANDEX_FOLDER_ID}" in name:
+        if not folder_id:
+            return name
+        name = name.replace("${YANDEX_FOLDER_ID}", folder_id)
+    if name.startswith("gpt://"):
+        return name
+    if not folder_id:
+        return name
+    return f"gpt://{folder_id}/{name.lstrip('/')}"
+
+
+def _yandex_headers() -> dict[str, str]:
+    headers = {"x-data-logging-enabled": "false"}
+    folder_id = _folder_id()
+    if folder_id:
+        headers["x-folder-id"] = folder_id
+    return headers
+
+
+class YandexProfile(ProviderProfile):
+    """Yandex AI Studio — folder headers read from env at access time."""
+
+    @property
+    def default_headers(self) -> dict[str, str]:
+        return _yandex_headers()
+
+    @default_headers.setter
+    def default_headers(self, value: dict[str, str]) -> None:
+        # dataclass compatibility; ignore static assignment
+        return
+
+    def fetch_models(
+        self,
+        *,
+        api_key: str | None = None,
+        timeout: float = 8.0,
+    ) -> list[str] | None:
+        url = (self.models_url or "").strip() or (self.base_url.rstrip("/") + "/models")
+        req = urllib.request.Request(url)
+        if api_key:
+            req.add_header("Authorization", f"Api-Key {api_key}")
+        req.add_header("Accept", "application/json")
+        req.add_header("User-Agent", _profile_user_agent())
+        for key, value in _yandex_headers().items():
+            req.add_header(key, value)
+        try:
+            with urllib.request.urlopen(req, timeout=timeout) as resp:
+                data = json.loads(resp.read().decode())
+            items = data if isinstance(data, list) else data.get("data", [])
+            return [m["id"] for m in items if isinstance(m, dict) and "id" in m]
+        except Exception:
+            return None
+
+    def build_api_kwargs_extras(
+        self,
+        *,
+        reasoning_config: dict | None = None,
+        model: str | None = None,
+        **context: Any,
+    ) -> tuple[dict[str, Any], dict[str, Any]]:
+        # Yandex OpenAI-compat rejects extra_body.thinking for DeepSeek V4 Flash.
+        return {}, {}
+
+
+yandex = YandexProfile(
+    name="yandex",
+    aliases=("yandex-ai-studio", "yandex-aistudio"),
+    env_vars=("YANDEX_API_KEY", "YANDEX_FOLDER_ID"),
+    display_name="Yandex AI Studio",
+    description="Yandex Cloud AI Studio — Model Gallery",
+    signup_url="https://aistudio.yandex.ru/",
+    base_url=_BASE_URL,
+    hostname="llm.api.cloud.yandex.net",
+    auth_type="api_key",
+    fallback_models=(_DEFAULT_MODEL,),
+    default_aux_model=_DEFAULT_MODEL,
+)
+
+register_provider(yandex)
diff --git a/plugins/model-providers/yandex/plugin.yaml b/plugins/model-providers/yandex/plugin.yaml
new file mode 100644
index 000000000000..18e4d7528c00
--- /dev/null
+++ b/plugins/model-providers/yandex/plugin.yaml
@@ -0,0 +1,5 @@
+name: yandex
+kind: model-provider
+version: 1.0.0
+description: Yandex Cloud AI Studio (OpenAI-compatible Model Gallery)
+author: pamnard
diff --git a/tests/hermes_cli/test_yandex_provider.py b/tests/hermes_cli/test_yandex_provider.py
new file mode 100644
index 000000000000..bffb492ccde8
--- /dev/null
+++ b/tests/hermes_cli/test_yandex_provider.py
@@ -0,0 +1,86 @@
+"""Tests for Yandex AI Studio provider support."""
+
+from __future__ import annotations
+
+import pytest
+
+from hermes_cli.auth import PROVIDER_REGISTRY, resolve_provider
+from plugins.model_providers.yandex import normalize_yandex_model
+
+
+class TestYandexProviderRegistry:
+    def test_registered(self):
+        assert "yandex" in PROVIDER_REGISTRY
+
+    def test_inference_base_url(self):
+        assert (
+            PROVIDER_REGISTRY["yandex"].inference_base_url
+            == "https://llm.api.cloud.yandex.net/v1"
+        )
+
+    def test_api_key_env_vars(self):
+        assert "YANDEX_API_KEY" in PROVIDER_REGISTRY["yandex"].api_key_env_vars
+
+
+class TestYandexAliases:
+    @pytest.mark.parametrize("alias", ["yandex", "yandex-ai-studio", "yandex-aistudio"])
+    def test_alias_resolves(self, alias, monkeypatch):
+        monkeypatch.setenv("YANDEX_API_KEY", "test-key-1234567890123456")
+        monkeypatch.setenv("YANDEX_FOLDER_ID", "b1folder")
+        assert resolve_provider(alias) == "yandex"
+
+
+class TestNormalizeYandexModel:
+    def test_bare_model_becomes_gpt_uri(self, monkeypatch):
+        monkeypatch.setenv("YANDEX_FOLDER_ID", "b1folder")
+        assert (
+            normalize_yandex_model("deepseek-v4-flash/latest")
+            == "gpt://b1folder/deepseek-v4-flash/latest"
+        )
+
+    def test_expands_folder_env_placeholder(self, monkeypatch):
+        monkeypatch.setenv("YANDEX_FOLDER_ID", "b1folder")
+        assert (
+            normalize_yandex_model("gpt://${YANDEX_FOLDER_ID}/deepseek-v4-flash/latest")
+            == "gpt://b1folder/deepseek-v4-flash/latest"
+        )
+
+    def test_passthrough_existing_gpt_uri(self, monkeypatch):
+        monkeypatch.setenv("YANDEX_FOLDER_ID", "b1folder")
+        uri = "gpt://b1folder/deepseek-v4-flash/latest"
+        assert normalize_yandex_model(uri) == uri
+
+    def test_missing_folder_leaves_placeholder(self, monkeypatch):
+        monkeypatch.delenv("YANDEX_FOLDER_ID", raising=False)
+        raw = "gpt://${YANDEX_FOLDER_ID}/deepseek-v4-flash/latest"
+        assert normalize_yandex_model(raw) == raw
+
+    def test_model_normalize_integration(self, monkeypatch):
+        from hermes_cli.model_normalize import normalize_model_for_provider
+
+        monkeypatch.setenv("YANDEX_FOLDER_ID", "b1folder")
+        assert (
+            normalize_model_for_provider("deepseek-v4-flash/latest", "yandex")
+            == "gpt://b1folder/deepseek-v4-flash/latest"
+        )
+
+
+class TestYandexProfileHooks:
+    def test_no_thinking_extra_body(self):
+        from providers import get_provider_profile
+
+        profile = get_provider_profile("yandex")
+        extra, top = profile.build_api_kwargs_extras(
+            model="gpt://b1folder/deepseek-v4-flash/latest",
+            reasoning_config={"enabled": True, "effort": "medium"},
+        )
+        assert extra == {}
+        assert top == {}
+
+    def test_dynamic_folder_header(self, monkeypatch):
+        from providers import get_provider_profile
+
+        monkeypatch.setenv("YANDEX_FOLDER_ID", "b1folder")
+        profile = get_provider_profile("yandex")
+        assert profile.default_headers["x-folder-id"] == "b1folder"
+        assert profile.default_headers["x-data-logging-enabled"] == "false"