> ## Documentation Index
> Fetch the complete documentation index at: https://thethirdpenco-feat-tool-lifecycle-events.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# deepseek()

> Create a DeepSeek language model

Factory function to create a DeepSeek model instance. DeepSeek provides powerful AI models through an OpenAI-compatible API.

## Signature

```python theme={null}
def deepseek(model_id: str, *, api_key: str | None = None) -> LanguageModel
```

## Parameters

<ParamField path="model_id" type="str" required>
  The DeepSeek model identifier (e.g., "deepseek-chat", "deepseek-reasoner").
</ParamField>

<ParamField path="api_key" type="str" optional>
  DeepSeek API key. Falls back to `DEEPSEEK_API_KEY` environment variable.
</ParamField>

## Returns

A `LanguageModel` instance configured for DeepSeek.

## Environment

Requires `DEEPSEEK_API_KEY` environment variable.

```bash theme={null}
export DEEPSEEK_API_KEY="sk-..."
```

## Available Models

| Model ID            | Description                              |
| ------------------- | ---------------------------------------- |
| `deepseek-chat`     | DeepSeek-V3 - general purpose chat model |
| `deepseek-reasoner` | DeepSeek-R1 - advanced reasoning model   |

## Example

```python theme={null}
from ai_query import generate_text
from ai_query.providers import deepseek

result = await generate_text(
    model=deepseek("deepseek-chat"),
    prompt="Hello, world!"
)
```

## Provider Options

```python theme={null}
result = await generate_text(
    model=deepseek("deepseek-reasoner"),
    prompt="Solve this problem step by step.",
    provider_options={
        "openai": {
            "temperature": 0.7,
            "max_tokens": 2000
        }
    }
)
```