feat(gisoo): add Gisoo as an OpenAI-compatible provider

litellm-rust/crates/core-utils/src/exception_mapping_utils/original.rs

@@ -95,6 +95,7 @@ const OPENAI_COMPATIBLE_PROVIDERS: &[&str] = &[
     "ragflow",
     "pinstripes",
     "openinfer",
+    "gisoo",
     "darkbloom",
     "meta",
     "cognition",

litellm/constants.py

@@ -1062,6 +1062,7 @@ openai_compatible_endpoints: Final[list[str]] = [
     "https://api.reka.ai/v1",
     "https://gigachat.devices.sberbank.ru/api/v1",
     "https://api.openinfer.ai/v1",
+    "https://gisoo.pro/api/v1",
 ]
 
 
@@ -1141,6 +1142,7 @@ openai_compatible_providers: Final[list[str]] = [
     "prism",
     "sail",
     "reka",
+    "gisoo",
 ]
 
 OPENAI_AUDIO_TRANSCRIPTION_PROVIDERS: Final = frozenset({"openai"} | frozenset(openai_compatible_providers))

litellm/llms/openai_like/providers.json

@@ -225,6 +225,16 @@
     "api_base_env": "SAIL_API_BASE",
     "supported_endpoints": ["/v1/chat/completions", "/v1/responses", "/v1/messages"]
   },
+  "gisoo": {
+    "base_url": "https://gisoo.pro/api/v1",
+    "api_key_env": "GISOO_API_KEY",
+    "api_base_env": "GISOO_API_BASE",
+    "base_class": "openai_gpt",
+    "provider_info": {
+      "supports_function_calling": true
+    },
+    "supported_endpoints": ["/v1/chat/completions", "/v1/responses"]
+  },
   "reka": {
     "base_url": "https://api.reka.ai/v1",
     "api_key_env": "REKA_API_KEY",

litellm/provider_endpoints_support_backup.json

@@ -2748,6 +2748,23 @@
         "rerank": false,
         "a2a": false
       }
+    },
+    "gisoo": {
+      "display_name": "Gisoo (`gisoo`)",
+      "url": "https://gisoo.pro/docs/litellm",
+      "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
+      }
     }
   },
   "endpoints": {

litellm/proxy/public_endpoints/provider_create_fields.json

@@ -2791,6 +2791,34 @@
     ],
     "default_model_placeholder": "openinfer/@oi/Qwen3.5-27B"
   },
+  {
+    "provider": "GISOO",
+    "provider_display_name": "Gisoo",
+    "litellm_provider": "gisoo",
+    "credential_fields": [
+      {
+        "key": "api_base",
+        "label": "API Base",
+        "placeholder": "https://gisoo.pro/api/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": "gisoo/claude-sonnet-5-5"
+  },
   {
     "provider": "OPENAI_LIKE",
     "provider_display_name": "Openai Like",

litellm/types/utils.py

@@ -4586,6 +4586,7 @@ class LlmProviders(str, Enum):
     META = "meta"
     SAIL = "sail"
     REKA = "reka"
+    GISOO = "gisoo"
     LITELLM_AGENT = "litellm_agent"
     CURSOR = "cursor"
     BEDROCK_MANTLE = "bedrock_mantle"

provider_endpoints_support.json

@@ -3272,6 +3272,23 @@
         "rerank": false,
         "a2a": false
       }
+    },
+    "gisoo": {
+      "display_name": "Gisoo (`gisoo`)",
+      "url": "https://gisoo.pro/docs/litellm",
+      "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
+      }
     }
   },
   "endpoints": {

tests/unit/llms/openai_like/test_gisoo_provider.py

@@ -0,0 +1,117 @@
+import json
+from pathlib import Path
+from typing import Final
+
+import pytest
+import respx
+
+import litellm
+
+_CHAT_URL: Final = "https://gisoo.pro/api/v1/chat/completions"
+_CHAT_RESPONSE: Final = {
+    "id": "chatcmpl_gisoo",
+    "object": "chat.completion",
+    "created": 1_792_000_000,
+    "model": "claude-sonnet-5-5",
+    "choices": [{"index": 0, "message": {"role": "assistant", "content": "Hello from Gisoo"}, "finish_reason": "stop"}],
+    "usage": {"prompt_tokens": 4, "completion_tokens": 3, "total_tokens": 7},
+}
+
+
+def test_gisoo_is_a_registered_provider():
+    assert litellm.LlmProviders.GISOO.value == "gisoo"
+    assert "gisoo" in litellm.provider_list
+    assert "gisoo" in litellm.constants.openai_compatible_providers
+
+
+def test_gisoo_provider_resolution(monkeypatch: pytest.MonkeyPatch):
+    from litellm.litellm_core_utils.get_llm_provider_logic import get_llm_provider
+
+    monkeypatch.delenv("GISOO_API_BASE", raising=False)
+    monkeypatch.setenv("GISOO_API_KEY", "gisoo-test-key")
+
+    model, provider, api_key, api_base = get_llm_provider(
+        model="gisoo/claude-sonnet-5-5", custom_llm_provider=None, api_base=None, api_key=None
+    )
+
+    assert model == "claude-sonnet-5-5"
+    assert provider == "gisoo"
+    assert api_key == "gisoo-test-key"
+    assert api_base == "https://gisoo.pro/api/v1"
+
+
+def test_gisoo_api_base_env_overrides_default(monkeypatch: pytest.MonkeyPatch):
+    from litellm.litellm_core_utils.get_llm_provider_logic import get_llm_provider
+
+    monkeypatch.setenv("GISOO_API_KEY", "gisoo-test-key")
+    monkeypatch.setenv("GISOO_API_BASE", "https://gisoo.example/api/v1")
+
+    _, _, _, api_base = get_llm_provider(
+        model="gisoo/claude-sonnet-5-5", custom_llm_provider=None, api_base=None, api_key=None
+    )
+
+    assert api_base == "https://gisoo.example/api/v1"
+
+
+def test_gisoo_chat_completion_request():
+    with respx.mock() as upstream:
+        route: Final = upstream.post(_CHAT_URL).respond(200, json=_CHAT_RESPONSE)
+        response: Final = litellm.completion(
+            model="gisoo/claude-sonnet-5-5",
+            messages=[{"role": "user", "content": "Say hello"}],
+            api_key="gisoo-test-key",
+        )
+
+    request: Final = route.calls.last.request
+    body: Final = json.loads(request.content)
+    assert str(request.url) == _CHAT_URL
+    assert request.headers["authorization"] == "Bearer gisoo-test-key"
+    assert body["model"] == "claude-sonnet-5-5"
+    assert response.choices[0].message.content == "Hello from Gisoo"
+
+
+def test_gisoo_responses_request():
+    with respx.mock() as upstream:
+        route: Final = upstream.post("https://gisoo.pro/api/v1/responses").respond(
+            200,
+            json={
+                "id": "resp_gisoo",
+                "object": "response",
+                "created_at": 1_792_000_000,
+                "model": "claude-sonnet-5-5",
+                "status": "completed",
+                "output": [
+                    {
+                        "id": "msg_gisoo",
+                        "type": "message",
+                        "role": "assistant",
+                        "status": "completed",
+                        "content": [{"type": "output_text", "text": "Hello from Gisoo", "annotations": []}],
+                    }
+                ],
+                "usage": {"input_tokens": 4, "output_tokens": 3, "total_tokens": 7},
+            },
+        )
+        response: Final = litellm.responses(model="gisoo/claude-sonnet-5-5", input="Say hello", api_key="gisoo-test-key")
+
+    body: Final = json.loads(route.calls.last.request.content)
+    assert route.call_count == 1
+    assert body["model"] == "claude-sonnet-5-5"
+    assert response.output[0].content[0].text == "Hello from Gisoo"
+
+
+def test_gisoo_is_available_in_add_model_form():
+    fields_path = Path(litellm.__file__).parent / "proxy" / "public_endpoints" / "provider_create_fields.json"
+    gisoo = next(p for p in json.loads(fields_path.read_text()) if p["litellm_provider"] == "gisoo")
+
+    assert gisoo["provider"] == "GISOO"
+    assert {f["key"]: f["required"] for f in gisoo["credential_fields"]} == {"api_base": False, "api_key": True}
+
+
+def test_gisoo_supported_endpoints():
+    root = Path(litellm.__file__).parent
+    for path in (root.parent / "provider_endpoints_support.json", root / "provider_endpoints_support_backup.json"):
+        endpoints = json.loads(path.read_text())["providers"]["gisoo"]["endpoints"]
+        assert endpoints["chat_completions"] is True
+        assert endpoints["responses"] is True
+        assert endpoints["messages"] is False