diff --git a/README.md b/README.md
index 7ffc44854bb..85e06ded952 100644
--- a/README.md
+++ b/README.md
@@ -399,6 +399,7 @@ Set `LITELLM_PROXY_API_BASE` and `LITELLM_PROXY_API_KEY` and every model call th
 | [Typesafe Decisions API (`typesafe`)](https://docs.litellm.ai/docs/providers) |  |  |  |  |  |  |  |  |  |  |
 | [V0 (`v0`)](https://docs.litellm.ai/docs/providers/v0) | ✅ | ✅ | ✅ |  |  |  |  |  |  |  |
 | [Vercel AI Gateway (`vercel_ai_gateway`)](https://docs.litellm.ai/docs/providers/vercel_ai_gateway) | ✅ | ✅ | ✅ |  |  |  |  |  |  |  |
+| [Viktor (`viktor`)](https://docs.litellm.ai/docs/providers/viktor) | ✅ |  | ✅ |  |  |  |  |  |  |  |
 | [VLLM (`vllm`)](https://docs.litellm.ai/docs/providers/vllm) | ✅ | ✅ | ✅ |  |  |  |  |  |  |  |
 | [Volcengine (`volcengine`)](https://docs.litellm.ai/docs/providers/volcano) | ✅ | ✅ | ✅ |  |  |  |  |  |  |  |
 | [Voyage AI (`voyage`)](https://docs.litellm.ai/docs/providers/voyage) |  |  |  | ✅ |  |  |  |  |  |  |
diff --git a/litellm/constants.py b/litellm/constants.py
index 69ff3cf7a5e..739ed873e07 100644
--- a/litellm/constants.py
+++ b/litellm/constants.py
@@ -966,6 +966,7 @@ openai_compatible_endpoints: Final[list] = [
     "https://api.cortecs.ai/v1",
     "https://api.scx.ai/v1",
     "https://api.prisminference.com/v1",
+    "https://api.viktor.com/api/compat/v1",
     "https://gigachat.devices.sberbank.ru/api/v1",
 ]
 
diff --git a/litellm/llms/openai_like/providers.json b/litellm/llms/openai_like/providers.json
index 61ff4be3a46..bf39e88d709 100644
--- a/litellm/llms/openai_like/providers.json
+++ b/litellm/llms/openai_like/providers.json
@@ -218,5 +218,11 @@
     "api_key_env": "SAIL_API_KEY",
     "api_base_env": "SAIL_API_BASE",
     "supported_endpoints": ["/v1/chat/completions", "/v1/responses", "/v1/messages"]
+  },
+  "viktor": {
+    "base_url": "https://api.viktor.com/api/compat/v1",
+    "api_key_env": "VIKTOR_API_KEY",
+    "api_base_env": "VIKTOR_API_BASE",
+    "supported_endpoints": ["/v1/chat/completions", "/v1/responses"]
   }
 }
diff --git a/litellm/provider_endpoints_support_backup.json b/litellm/provider_endpoints_support_backup.json
index c9635587eeb..3d73f1249e0 100644
--- a/litellm/provider_endpoints_support_backup.json
+++ b/litellm/provider_endpoints_support_backup.json
@@ -2298,6 +2298,23 @@
         "interactions": true
       }
     },
+    "viktor": {
+      "display_name": "Viktor (`viktor`)",
+      "url": "https://docs.litellm.ai/docs/providers/viktor",
+      "endpoints": {
+        "chat_completions": true,
+        "messages": false,
+        "responses": true,
+        "embeddings": false,
+        "image_generations": false,
+        "audio_transcriptions": false,
+        "audio_speech": false,
+        "moderations": false,
+        "batches": false,
+        "rerank": false,
+        "a2a": false
+      }
+    },
     "vllm": {
       "display_name": "VLLM (`vllm`)",
       "url": "https://docs.litellm.ai/docs/providers/vllm",
diff --git a/litellm/proxy/public_endpoints/provider_create_fields.json b/litellm/proxy/public_endpoints/provider_create_fields.json
index 6e96d6ad0ec..f50a18067b3 100644
--- a/litellm/proxy/public_endpoints/provider_create_fields.json
+++ b/litellm/proxy/public_endpoints/provider_create_fields.json
@@ -3515,6 +3515,34 @@
     ],
     "default_model_placeholder": "voyage/"
   },
+  {
+    "provider": "Viktor",
+    "provider_display_name": "Viktor",
+    "litellm_provider": "viktor",
+    "credential_fields": [
+      {
+        "key": "api_base",
+        "label": "API Base",
+        "placeholder": "https://api.viktor.com/api/compat/v1",
+        "tooltip": null,
+        "required": false,
+        "field_type": "text",
+        "options": null,
+        "default_value": null
+      },
+      {
+        "key": "api_key",
+        "label": "API Key",
+        "placeholder": null,
+        "tooltip": null,
+        "required": true,
+        "field_type": "password",
+        "options": null,
+        "default_value": null
+      }
+    ],
+    "default_model_placeholder": "viktor/viktor"
+  },
   {
     "provider": "WANDB",
     "provider_display_name": "Wandb",
diff --git a/litellm/types/utils.py b/litellm/types/utils.py
index 142f9b14a72..575ea4e5a16 100644
--- a/litellm/types/utils.py
+++ b/litellm/types/utils.py
@@ -4177,6 +4177,7 @@ class LlmProviders(str, Enum):
     CORTECS = "cortecs"
     SCX_AI = "scx-ai"
     PRISM = "prism"
+    VIKTOR = "viktor"
     DARKBLOOM = "darkbloom"
     META = "meta"
     SAIL = "sail"
diff --git a/provider_endpoints_support.json b/provider_endpoints_support.json
index 7ffaacdb3aa..ec7f962234b 100644
--- a/provider_endpoints_support.json
+++ b/provider_endpoints_support.json
@@ -2673,6 +2673,23 @@
         "interactions": true
       }
     },
+    "viktor": {
+      "display_name": "Viktor (`viktor`)",
+      "url": "https://docs.litellm.ai/docs/providers/viktor",
+      "endpoints": {
+        "chat_completions": true,
+        "messages": false,
+        "responses": true,
+        "embeddings": false,
+        "image_generations": false,
+        "audio_transcriptions": false,
+        "audio_speech": false,
+        "moderations": false,
+        "batches": false,
+        "rerank": false,
+        "a2a": false
+      }
+    },
     "vllm": {
       "display_name": "VLLM (`vllm`)",
       "url": "https://docs.litellm.ai/docs/providers/vllm",
diff --git a/tests/unit/llms/openai_like/test_viktor_provider.py b/tests/unit/llms/openai_like/test_viktor_provider.py
new file mode 100644
index 00000000000..47f460c1c16
--- /dev/null
+++ b/tests/unit/llms/openai_like/test_viktor_provider.py
@@ -0,0 +1,148 @@
+import json
+from pathlib import Path
+
+import httpx
+import pytest
+import respx
+
+import litellm
+from litellm.llms.openai_like.json_loader import JSONProviderRegistry
+
+CHAT_COMPLETION = {
+    "id": "chatcmpl-1",
+    "object": "chat.completion",
+    "created": 1,
+    "model": "viktor",
+    "choices": [{"index": 0, "message": {"role": "assistant", "content": "hello"}, "finish_reason": "stop"}],
+    "usage": {"prompt_tokens": 1, "completion_tokens": 1, "total_tokens": 2},
+}
+
+RESPONSE = {
+    "id": "resp-1",
+    "object": "response",
+    "created_at": 1,
+    "status": "completed",
+    "model": "viktor",
+    "output": [
+        {
+            "type": "message",
+            "id": "msg_1",
+            "role": "assistant",
+            "status": "completed",
+            "content": [{"type": "output_text", "text": "hello", "annotations": []}],
+        }
+    ],
+    "usage": {"input_tokens": 1, "output_tokens": 1, "total_tokens": 2},
+}
+
+MESSAGES = [{"role": "user", "content": "hi"}]
+
+
+@pytest.fixture
+def base_url() -> str:
+    provider = JSONProviderRegistry.get("viktor")
+    assert provider is not None
+    return provider.base_url
+
+
+@pytest.fixture(autouse=True)
+def viktor_env(monkeypatch: pytest.MonkeyPatch) -> None:
+    monkeypatch.setenv("VIKTOR_API_KEY", "env-key")
+    monkeypatch.delenv("VIKTOR_API_BASE", raising=False)
+
+
+@pytest.fixture
+def viktor_http():
+    with respx.mock(assert_all_called=False) as router:
+        yield router
+
+
+def test_completion_posts_to_viktor_with_the_env_key(viktor_http: respx.MockRouter, base_url: str) -> None:
+    route = viktor_http.post(f"{base_url}/chat/completions").mock(
+        return_value=httpx.Response(200, json=CHAT_COMPLETION)
+    )
+
+    response = litellm.completion(model="viktor/viktor", messages=MESSAGES, max_completion_tokens=256)
+
+    assert response.choices[0].message.content == "hello"
+    request = route.calls.last.request
+    assert request.headers["authorization"] == "Bearer env-key"
+    body = json.loads(request.content)
+    assert body["model"] == "viktor"
+    assert body["max_completion_tokens"] == 256
+
+
+def test_responses_posts_to_viktor(viktor_http: respx.MockRouter, base_url: str) -> None:
+    route = viktor_http.post(f"{base_url}/responses").mock(return_value=httpx.Response(200, json=RESPONSE))
+
+    response = litellm.responses(model="viktor/viktor", input="hi")
+
+    assert response.output[-1].content[0].text == "hello"
+    assert json.loads(route.calls.last.request.content)["model"] == "viktor"
+
+
+def test_api_base_env_override_is_used(viktor_http: respx.MockRouter, monkeypatch: pytest.MonkeyPatch) -> None:
+    monkeypatch.setenv("VIKTOR_API_BASE", "https://gateway.example/api/compat/v1")
+    route = viktor_http.post("https://gateway.example/api/compat/v1/chat/completions").mock(
+        return_value=httpx.Response(200, json=CHAT_COMPLETION)
+    )
+
+    litellm.completion(model="viktor/viktor", messages=MESSAGES)
+
+    assert route.called
+
+
+def test_explicit_api_base_and_key_win(viktor_http: respx.MockRouter) -> None:
+    route = viktor_http.post("https://explicit.example/v1/chat/completions").mock(
+        return_value=httpx.Response(200, json=CHAT_COMPLETION)
+    )
+
+    litellm.completion(
+        model="viktor/viktor", messages=MESSAGES, api_base="https://explicit.example/v1", api_key="explicit-key"
+    )
+
+    assert route.calls.last.request.headers["authorization"] == "Bearer explicit-key"
+
+
+def test_unprefixed_model_on_the_viktor_base_url_uses_the_viktor_key(
+    viktor_http: respx.MockRouter, base_url: str
+) -> None:
+    route = viktor_http.post(f"{base_url}/chat/completions").mock(
+        return_value=httpx.Response(200, json=CHAT_COMPLETION)
+    )
+
+    litellm.completion(model="agent", messages=MESSAGES, api_base=base_url)
+
+    assert route.calls.last.request.headers["authorization"] == "Bearer env-key"
+
+
+def test_router_deployment_reaches_viktor(viktor_http: respx.MockRouter, base_url: str) -> None:
+    route = viktor_http.post(f"{base_url}/chat/completions").mock(
+        return_value=httpx.Response(200, json=CHAT_COMPLETION)
+    )
+    router = litellm.Router(model_list=[{"model_name": "agent", "litellm_params": {"model": "viktor/viktor"}}])
+
+    response = router.completion(model="agent", messages=MESSAGES)
+
+    assert response.choices[0].message.content == "hello"
+    assert route.called
+
+
+def test_transcription_is_refused_without_calling_viktor(viktor_http: respx.MockRouter) -> None:
+    catch_all = viktor_http.route().mock(return_value=httpx.Response(500))
+
+    with pytest.raises(ValueError, match="Unmapped provider"):
+        litellm.transcription(model="viktor/viktor", file=("a.wav", b"RIFF", "audio/wav"))
+
+    assert not catch_all.called
+
+
+def test_endpoint_matrix_matches_its_backup() -> None:
+    def endpoints(path: Path) -> dict:
+        return json.loads(path.read_text())["providers"]["viktor"]["endpoints"]
+
+    root = Path(__file__).parents[4] / "provider_endpoints_support.json"
+    backup = Path(litellm.__file__).parent / "provider_endpoints_support_backup.json"
+
+    assert endpoints(root) == endpoints(backup)
+    assert endpoints(root)["responses"] is JSONProviderRegistry.supports_responses_api("viktor")