Update docs

Author: Motta Kin

docs/api/providers.md

@@ -39,3 +39,5 @@
 ::: pydantic_ai.providers.moonshotai.MoonshotAIProvider
 
 ::: pydantic_ai.providers.ollama.OllamaProvider
+
+::: pydantic_ai.providers.litellm.LiteLLMProvider

docs/models/openai.md

@@ -563,3 +563,28 @@ result = agent.run_sync('What is the capital of France?')
 print(result.output)
 #> The capital of France is Paris.
 ```
+
+### LiteLLM
+
+To use [LiteLLM](https://www.litellm.ai/), set the configs as outlined in the [doc](https://docs.litellm.ai/docs/set_keys). What specific configs you need to set depends on your setup. For example, if you are using a LiteLLM proxy server, then you need to set the `api_base` and `api_key` configs.
+
+Once you have the configs, use the [`LiteLLMProvider`][pydantic_ai.providers.litellm.LiteLLMProvider] as follows:
+
+```python
+from pydantic_ai import Agent
+from pydantic_ai.models.openai import OpenAIChatModel
+from pydantic_ai.providers.litellm import LiteLLMProvider
+
+model = OpenAIChatModel(
+    'openai/gpt-3.5-turbo',
+    provider=LiteLLMProvider(
+        api_base='<litellm-api-base-url>',
+        api_key='<litellm-api-key>'
+    )
+)
+agent = Agent(model)
+
+result = agent.run_sync('What is the capital of France?')
+print(result.output)
+...
+```

pydantic_ai_slim/pydantic_ai/providers/litellm.py

@@ -125,18 +125,14 @@ def __init__(
             self._client = openai_client
             return
 
-        # Use api_base if provided, otherwise use a generic base URL
-        # LiteLLM doesn't actually use this URL - it routes internally
-        base_url = api_base or 'https://api.litellm.ai/v1'
-
         # Create OpenAI client that will be used with LiteLLM's completion function
         # The actual API calls will be intercepted and routed through LiteLLM
         if http_client is not None:
             self._client = AsyncOpenAI(
-                base_url=base_url, api_key=api_key or 'litellm-placeholder', http_client=http_client
+                base_url=api_base, api_key=api_key or 'litellm-placeholder', http_client=http_client
             )
         else:
             http_client = cached_async_http_client(provider='litellm')
             self._client = AsyncOpenAI(
-                base_url=base_url, api_key=api_key or 'litellm-placeholder', http_client=http_client
+                base_url=api_base, api_key=api_key or 'litellm-placeholder', http_client=http_client
             )