import Image from '@theme/IdealImage';
import Tabs from '@theme/Tabs';
import TabItem from '@theme/TabItem';

# Proxy Config.yaml
Set model list, `api_base`, `api_key`, `temperature` & proxy server settings (`master-key`) on the config.yaml. 

| Param Name           | Description                                                   |
|----------------------|---------------------------------------------------------------|
| `model_list`         | List of supported models on the server, with model-specific configs |
| `router_settings`   | litellm Router settings, example `routing_strategy="least-busy"` [**see all**](https://github.com/BerriAI/litellm/blob/6ef0e8485e0e720c0efa6f3075ce8119f2f62eea/litellm/router.py#L64)|
| `litellm_settings`   | litellm Module settings, example `litellm.drop_params=True`, `litellm.set_verbose=True`, `litellm.api_base`, `litellm.cache` [**see all**](https://github.com/BerriAI/litellm/blob/main/litellm/__init__.py)|
| `general_settings`   | Server settings, example setting `master_key: sk-my_special_key` |
| `environment_variables`   | Environment Variables example, `REDIS_HOST`, `REDIS_PORT` |

**Complete List:** Check the Swagger UI docs on `<your-proxy-url>/#/config.yaml` (e.g. http://0.0.0.0:4000/#/config.yaml), for everything you can pass in the config.yaml.


## Quick Start 

Set a model alias for your deployments. 

In the `config.yaml` the model_name parameter is the user-facing name to use for your deployment. 

In the config below:
- `model_name`: the name to pass TO litellm from the external client  
- `litellm_params.model`: the model string passed to the litellm.completion() function

E.g.: 
- `model=vllm-models` will route to `openai/facebook/opt-125m`. 
- `model=gpt-3.5-turbo` will load balance between `azure/gpt-turbo-small-eu` and `azure/gpt-turbo-small-ca`

```yaml
model_list:
  - model_name: gpt-3.5-turbo ### RECEIVED MODEL NAME ###
    litellm_params: # all params accepted by litellm.completion() - https://docs.litellm.ai/docs/completion/input
      model: azure/gpt-turbo-small-eu ### MODEL NAME sent to `litellm.completion()` ###
      api_base: https://my-endpoint-europe-berri-992.openai.azure.com/
      api_key: "os.environ/AZURE_API_KEY_EU" # does os.getenv("AZURE_API_KEY_EU")
      rpm: 6      # [OPTIONAL] Rate limit for this deployment: in requests per minute (rpm)
  - model_name: bedrock-claude-v1 
    litellm_params:
      model: bedrock/anthropic.claude-instant-v1
  - model_name: gpt-3.5-turbo
    litellm_params:
      model: azure/gpt-turbo-small-ca
      api_base: https://my-endpoint-canada-berri992.openai.azure.com/
      api_key: "os.environ/AZURE_API_KEY_CA"
      rpm: 6
  - model_name: anthropic-claude
    litellm_params: 
      model: bedrock/anthropic.claude-instant-v1
      ### [OPTIONAL] SET AWS REGION ###
      aws_region_name: us-east-1
  - model_name: vllm-models
    litellm_params:
      model: openai/facebook/opt-125m # the `openai/` prefix tells litellm it's openai compatible
      api_base: http://0.0.0.0:4000
      rpm: 1440
    model_info: 
      version: 2

litellm_settings: # module level litellm settings - https://github.com/BerriAI/litellm/blob/main/litellm/__init__.py
  drop_params: True

general_settings: 
  master_key: sk-1234 # [OPTIONAL] Only use this if you to require all calls to contain this key (Authorization: Bearer sk-1234)
```
:::info

For more provider-specific info, [go here](../providers/)

:::

#### Step 2: Start Proxy with config

```shell
$ litellm --config /path/to/config.yaml
```


### Using Proxy - Curl Request, OpenAI Package, Langchain, Langchain JS
Calling a model group 

<Tabs>
<TabItem value="Curl" label="Curl Request">

Sends request to model where `model_name=gpt-3.5-turbo` on config.yaml. 

If multiple with `model_name=gpt-3.5-turbo` does [Load Balancing](https://docs.litellm.ai/docs/proxy/load_balancing)

```shell
curl --location 'http://0.0.0.0:4000/chat/completions' \
--header 'Content-Type: application/json' \
--data ' {
      "model": "gpt-3.5-turbo",
      "messages": [
        {
          "role": "user",
          "content": "what llm are you"
        }
      ],
    }
'
```
</TabItem>

<TabItem value="Curl2" label="Curl Request: Bedrock">

Sends this request to model where `model_name=bedrock-claude-v1` on config.yaml

```shell
curl --location 'http://0.0.0.0:4000/chat/completions' \
--header 'Content-Type: application/json' \
--data ' {
      "model": "bedrock-claude-v1",
      "messages": [
        {
          "role": "user",
          "content": "what llm are you"
        }
      ],
    }
'
```
</TabItem>
<TabItem value="openai" label="OpenAI v1.0.0+">

```python
import openai
client = openai.OpenAI(
    api_key="anything",
    base_url="http://0.0.0.0:4000"
)

# Sends request to model where `model_name=gpt-3.5-turbo` on config.yaml. 
response = client.chat.completions.create(model="gpt-3.5-turbo", messages = [
    {
        "role": "user",
        "content": "this is a test request, write a short poem"
    }
])

print(response)

# Sends this request to model where `model_name=bedrock-claude-v1` on config.yaml
response = client.chat.completions.create(model="bedrock-claude-v1", messages = [
    {
        "role": "user",
        "content": "this is a test request, write a short poem"
    }
])

print(response)

```

</TabItem>
<TabItem value="langchain" label="Langchain Python">

```python
from langchain.chat_models import ChatOpenAI
from langchain.prompts.chat import (
    ChatPromptTemplate,
    HumanMessagePromptTemplate,
    SystemMessagePromptTemplate,
)
from langchain.schema import HumanMessage, SystemMessage

messages = [
    SystemMessage(
        content="You are a helpful assistant that im using to make a test request to."
    ),
    HumanMessage(
        content="test from litellm. tell me why it's amazing in 1 sentence"
    ),
]

# Sends request to model where `model_name=gpt-3.5-turbo` on config.yaml. 
chat = ChatOpenAI(
    openai_api_base="http://0.0.0.0:4000",  # set openai base to the proxy
    model = "gpt-3.5-turbo",                
    temperature=0.1
)

response = chat(messages)
print(response)

# Sends request to model where `model_name=bedrock-claude-v1` on config.yaml. 
claude_chat = ChatOpenAI(
    openai_api_base="http://0.0.0.0:4000", # set openai base to the proxy
    model = "bedrock-claude-v1",                   
    temperature=0.1
)

response = claude_chat(messages)
print(response)
```

</TabItem>
</Tabs>


## Save Model-specific params (API Base, Keys, Temperature, Max Tokens, Organization, Headers etc.)
You can use the config to save model-specific information like api_base, api_key, temperature, max_tokens, etc. 

[**All input params**](https://docs.litellm.ai/docs/completion/input#input-params-1)

**Step 1**: Create a `config.yaml` file
```yaml
model_list:
  - model_name: gpt-4-team1
    litellm_params: # params for litellm.completion() - https://docs.litellm.ai/docs/completion/input#input---request-body
      model: azure/chatgpt-v-2
      api_base: https://openai-gpt-4-test-v-1.openai.azure.com/
      api_version: "2023-05-15"
      azure_ad_token: eyJ0eXAiOiJ
      seed: 12
      max_tokens: 20
  - model_name: gpt-4-team2
    litellm_params:
      model: azure/gpt-4
      api_key: sk-123
      api_base: https://openai-gpt-4-test-v-2.openai.azure.com/
      temperature: 0.2
  - model_name: openai-gpt-3.5
    litellm_params:
      model: openai/gpt-3.5-turbo
      extra_headers: {"AI-Resource Group": "ishaan-resource"}
      api_key: sk-123
      organization: org-ikDc4ex8NB
      temperature: 0.2
  - model_name: mistral-7b
    litellm_params:
      model: ollama/mistral
      api_base: your_ollama_api_base
```

**Step 2**: Start server with config

```shell
$ litellm --config /path/to/config.yaml
```


## Load Balancing 

:::info
For more on this, go to [this page](./load_balancing.md)
:::

Use this to call multiple instances of the same model and configure things like [routing strategy](../routing.md#advanced). 

For optimal performance:
- Set `tpm/rpm` per model deployment. Weighted picks are then based on the established tpm/rpm.
- Select your optimal routing strategy in `router_settings:routing_strategy`. 

LiteLLM supports
```python
["simple-shuffle", "least-busy", "usage-based-routing","latency-based-routing"], default="simple-shuffle"`
```

When `tpm/rpm` is set + `routing_strategy==simple-shuffle` litellm will use a weighted pick based on set tpm/rpm. **In our load tests setting tpm/rpm for all deployments + `routing_strategy==simple-shuffle` maximized throughput**
- When using multiple LiteLLM Servers / Kubernetes set redis settings `router_settings:redis_host` etc

```yaml
model_list:
  - model_name: zephyr-beta
    litellm_params:
        model: huggingface/HuggingFaceH4/zephyr-7b-beta
        api_base: http://0.0.0.0:8001
        rpm: 60      # Optional[int]: When rpm/tpm set - litellm uses weighted pick for load balancing. rpm = Rate limit for this deployment: in requests per minute (rpm).
        tpm: 1000   # Optional[int]: tpm = Tokens Per Minute 
  - model_name: zephyr-beta
    litellm_params:
        model: huggingface/HuggingFaceH4/zephyr-7b-beta
        api_base: http://0.0.0.0:8002
        rpm: 600      
  - model_name: zephyr-beta
    litellm_params:
        model: huggingface/HuggingFaceH4/zephyr-7b-beta
        api_base: http://0.0.0.0:8003
        rpm: 60000      
  - model_name: gpt-3.5-turbo
    litellm_params:
        model: gpt-3.5-turbo
        api_key: <my-openai-key>
        rpm: 200      
  - model_name: gpt-3.5-turbo-16k
    litellm_params:
        model: gpt-3.5-turbo-16k
        api_key: <my-openai-key>
        rpm: 100      

litellm_settings:
  num_retries: 3 # retry call 3 times on each model_name (e.g. zephyr-beta)
  request_timeout: 10 # raise Timeout error if call takes longer than 10s. Sets litellm.request_timeout 
  fallbacks: [{"zephyr-beta": ["gpt-3.5-turbo"]}] # fallback to gpt-3.5-turbo if call fails num_retries 
  context_window_fallbacks: [{"zephyr-beta": ["gpt-3.5-turbo-16k"]}, {"gpt-3.5-turbo": ["gpt-3.5-turbo-16k"]}] # fallback to gpt-3.5-turbo-16k if context window error
  allowed_fails: 3 # cooldown model if it fails > 1 call in a minute. 

router_settings: # router_settings are optional
  routing_strategy: simple-shuffle # Literal["simple-shuffle", "least-busy", "usage-based-routing","latency-based-routing"], default="simple-shuffle"
  model_group_alias: {"gpt-4": "gpt-3.5-turbo"} # all requests with `gpt-4` will be routed to models with `gpt-3.5-turbo`
  num_retries: 2
  timeout: 30                                  # 30 seconds
  redis_host: <your redis host>                # set this when using multiple litellm proxy deployments, load balancing state stored in redis
  redis_password: <your redis password>
  redis_port: 1992
```

You can view your cost once you set up [Virtual keys](https://docs.litellm.ai/docs/proxy/virtual_keys) or [custom_callbacks](https://docs.litellm.ai/docs/proxy/logging)

## Load API Keys

### Load API Keys from Environment 

If you have secrets saved in your environment, and don't want to expose them in the config.yaml, here's how to load model-specific keys from the environment. 

```python
os.environ["AZURE_NORTH_AMERICA_API_KEY"] = "your-azure-api-key"
```

```yaml 
model_list:
  - model_name: gpt-4-team1
    litellm_params: # params for litellm.completion() - https://docs.litellm.ai/docs/completion/input#input---request-body
      model: azure/chatgpt-v-2
      api_base: https://openai-gpt-4-test-v-1.openai.azure.com/
      api_version: "2023-05-15"
      api_key: os.environ/AZURE_NORTH_AMERICA_API_KEY
```

[**See Code**](https://github.com/BerriAI/litellm/blob/c12d6c3fe80e1b5e704d9846b246c059defadce7/litellm/utils.py#L2366)

s/o to [@David Manouchehri](https://www.linkedin.com/in/davidmanouchehri/) for helping with this. 

### Load API Keys from Azure Vault 

1. Install Proxy dependencies 
```bash
$ pip install 'litellm[proxy]' 'litellm[extra_proxy]'
```

2. Save Azure details in your environment
```bash 
export["AZURE_CLIENT_ID"]="your-azure-app-client-id"
export["AZURE_CLIENT_SECRET"]="your-azure-app-client-secret"
export["AZURE_TENANT_ID"]="your-azure-tenant-id"
export["AZURE_KEY_VAULT_URI"]="your-azure-key-vault-uri"
```

3. Add to proxy config.yaml 
```yaml
model_list: 
    - model_name: "my-azure-models" # model alias 
        litellm_params:
            model: "azure/<your-deployment-name>"
            api_key: "os.environ/AZURE-API-KEY" # reads from key vault - get_secret("AZURE_API_KEY")
            api_base: "os.environ/AZURE-API-BASE" # reads from key vault - get_secret("AZURE_API_BASE")

general_settings:
  use_azure_key_vault: True
```

You can now test this by starting your proxy: 
```bash
litellm --config /path/to/config.yaml
```

### Set Custom Prompt Templates

LiteLLM by default checks if a model has a [prompt template and applies it](../completion/prompt_formatting.md) (e.g. if a huggingface model has a saved chat template in it's tokenizer_config.json). However, you can also set a custom prompt template on your proxy in the `config.yaml`: 

**Step 1**: Save your prompt template in a `config.yaml`
```yaml
# Model-specific parameters
model_list:
  - model_name: mistral-7b # model alias
    litellm_params: # actual params for litellm.completion()
      model: "huggingface/mistralai/Mistral-7B-Instruct-v0.1" 
      api_base: "<your-api-base>"
      api_key: "<your-api-key>" # [OPTIONAL] for hf inference endpoints
      initial_prompt_value: "\n"
      roles: {"system":{"pre_message":"<|im_start|>system\n", "post_message":"<|im_end|>"}, "assistant":{"pre_message":"<|im_start|>assistant\n","post_message":"<|im_end|>"}, "user":{"pre_message":"<|im_start|>user\n","post_message":"<|im_end|>"}}
      final_prompt_value: "\n"
      bos_token: "<s>"
      eos_token: "</s>"
      max_tokens: 4096
```

**Step 2**: Start server with config

```shell
$ litellm --config /path/to/config.yaml
```

## Setting Embedding Models 

See supported Embedding Providers & Models [here](https://docs.litellm.ai/docs/embedding/supported_embedding)

### Use Sagemaker, Bedrock, Azure, OpenAI, XInference
#### Create Config.yaml

<Tabs>
<TabItem value="bedrock" label="Bedrock Completion/Chat">

```yaml
model_list:
  - model_name: bedrock-cohere
    litellm_params:
      model: "bedrock/cohere.command-text-v14"
      aws_region_name: "us-west-2"
  - model_name: bedrock-cohere
    litellm_params:
      model: "bedrock/cohere.command-text-v14"
      aws_region_name: "us-east-2"
  - model_name: bedrock-cohere
    litellm_params:
      model: "bedrock/cohere.command-text-v14"
      aws_region_name: "us-east-1"

```

</TabItem>

<TabItem value="sagemaker" label="Sagemaker, Bedrock Embeddings">

Here's how to route between GPT-J embedding (sagemaker endpoint), Amazon Titan embedding (Bedrock) and Azure OpenAI embedding on the proxy server: 

```yaml
model_list:
  - model_name: sagemaker-embeddings
    litellm_params: 
      model: "sagemaker/berri-benchmarking-gpt-j-6b-fp16"
  - model_name: amazon-embeddings
    litellm_params:
      model: "bedrock/amazon.titan-embed-text-v1"
  - model_name: azure-embeddings
    litellm_params: 
      model: "azure/azure-embedding-model"
      api_base: "os.environ/AZURE_API_BASE" # os.getenv("AZURE_API_BASE")
      api_key: "os.environ/AZURE_API_KEY" # os.getenv("AZURE_API_KEY")
      api_version: "2023-07-01-preview"

general_settings:
  master_key: sk-1234 # [OPTIONAL] if set all calls to proxy will require either this key or a valid generated token
```

</TabItem>

<TabItem value="Hugging Face emb" label="Hugging Face Embeddings">
LiteLLM Proxy supports all <a href="https://huggingface.co/models?pipeline_tag=feature-extraction">Feature-Extraction Embedding models</a>.

```yaml
model_list:
  - model_name: deployed-codebert-base
    litellm_params: 
      # send request to deployed hugging face inference endpoint
      model: huggingface/microsoft/codebert-base # add huggingface prefix so it routes to hugging face
      api_key: hf_LdS                            # api key for hugging face inference endpoint
      api_base: https://uysneno1wv2wd4lw.us-east-1.aws.endpoints.huggingface.cloud # your hf inference endpoint 
  - model_name: codebert-base
    litellm_params: 
      # no api_base set, sends request to hugging face free inference api https://api-inference.huggingface.co/models/
      model: huggingface/microsoft/codebert-base # add huggingface prefix so it routes to hugging face
      api_key: hf_LdS                            # api key for hugging face                     

```

</TabItem>

<TabItem value="azure" label="Azure OpenAI Embeddings">

```yaml
model_list:
  - model_name: azure-embedding-model # model group
    litellm_params:
      model: azure/azure-embedding-model # model name for litellm.embedding(model=azure/azure-embedding-model) call
      api_base: your-azure-api-base
      api_key: your-api-key
      api_version: 2023-07-01-preview
```

</TabItem>

<TabItem value="openai" label="OpenAI Embeddings">

```yaml
model_list:
- model_name: text-embedding-ada-002 # model group
  litellm_params:
    model: text-embedding-ada-002 # model name for litellm.embedding(model=text-embedding-ada-002) 
    api_key: your-api-key-1
- model_name: text-embedding-ada-002 
  litellm_params:
    model: text-embedding-ada-002
    api_key: your-api-key-2
```

</TabItem>


<TabItem value="xinf" label="XInference">

https://docs.litellm.ai/docs/providers/xinference

**Note add `xinference/` prefix to `litellm_params`: `model` so litellm knows to route to OpenAI**

```yaml
model_list:
- model_name: embedding-model  # model group
  litellm_params:
    model: xinference/bge-base-en   # model name for litellm.embedding(model=xinference/bge-base-en) 
    api_base: http://0.0.0.0:9997/v1
```

</TabItem>

<TabItem value="openai emb" label="OpenAI Compatible Embeddings">

<p>Use this for calling <a href="https://github.com/xorbitsai/inference">/embedding endpoints on OpenAI Compatible Servers</a>.</p>

**Note add `openai/` prefix to `litellm_params`: `model` so litellm knows to route to OpenAI**

```yaml
model_list:
- model_name: text-embedding-ada-002  # model group
  litellm_params:
    model: openai/<your-model-name>   # model name for litellm.embedding(model=text-embedding-ada-002) 
    api_base: <model-api-base>
```

</TabItem>
</Tabs>

#### Start Proxy

```shell
litellm --config config.yaml
```

#### Make Request
Sends Request to `bedrock-cohere`

```shell
curl --location 'http://0.0.0.0:4000/chat/completions' \
  --header 'Content-Type: application/json' \
  --data ' {
  "model": "bedrock-cohere",
  "messages": [
      {
      "role": "user",
      "content": "gm"
      }
  ]
}'
```

## Disable Swagger UI 

To disable the Swagger docs from the base url, set 

```env
NO_DOCS="True"
```

in your environment, and restart the proxy. 


## Configure DB Pool Limits + Connection Timeouts 

```yaml
general_settings: 
  database_connection_pool_limit: 100 # sets connection pool for prisma client to postgres db at 100
  database_connection_timeout: 60 # sets a 60s timeout for any connection call to the db 
```

## All settings 

```python
{
  "environment_variables": {},
  "model_list": [
    {
      "model_name": "string",
      "litellm_params": {},
      "model_info": {
        "id": "string",
        "mode": "embedding",
        "input_cost_per_token": 0,
        "output_cost_per_token": 0,
        "max_tokens": 2048,
        "base_model": "gpt-4-1106-preview",
        "additionalProp1": {}
      }
    }
  ],
  "litellm_settings": {}, # ALL (https://github.com/BerriAI/litellm/blob/main/litellm/__init__.py)
  "general_settings": {
    "completion_model": "string",
    "disable_spend_logs": "boolean", # turn off writing each transaction to the db
    "disable_reset_budget": "boolean", # turn off reset budget scheduled task
    "enable_jwt_auth": "boolean", # allow proxy admin to auth in via jwt tokens with 'litellm_proxy_admin' in claims
    "enforce_user_param": "boolean", # requires all openai endpoint requests to have a 'user' param
    "allowed_routes": "list", # list of allowed proxy API routes - a user can access. (currently JWT-Auth only)
    "key_management_system": "google_kms", # either google_kms or azure_kms
    "master_key": "string",
    "database_url": "string",
    "database_connection_pool_limit": 0, # default 100
    "database_connection_timeout": 0, # default 60s
    "database_type": "dynamo_db",
    "database_args": {
      "billing_mode": "PROVISIONED_THROUGHPUT",
      "read_capacity_units": 0,
      "write_capacity_units": 0,
      "ssl_verify": true,
      "region_name": "string",
      "user_table_name": "LiteLLM_UserTable",
      "key_table_name": "LiteLLM_VerificationToken",
      "config_table_name": "LiteLLM_Config",
      "spend_table_name": "LiteLLM_SpendLogs"
    },
    "otel": true,
    "custom_auth": "string",
    "max_parallel_requests": 0,
    "infer_model_from_keys": true,
    "background_health_checks": true,
    "health_check_interval": 300,
    "alerting": [
      "string"
    ],
    "alerting_threshold": 0
  }
}
```

