> ## Documentation Index
> Fetch the complete documentation index at: https://docs.routerbase.com/llms.txt
> Use this file to discover all available pages before exploring further.

# DeepSeek Chat API

> DeepSeek chat models — V4 (Pro/Flash), V3 (3.2/3.2-Exp/3.1/3.1-Terminus/3-0324/turbo), R1 (R1-0528/turbo/distill), and Prover-V2 — via RouterBase, OpenAI-compatible chat completions.

## Overview

DeepSeek chat models on RouterBase, served through the standard
OpenAI-compatible chat completions endpoint with streaming and tool
calling.

|              |                                                                |
| ------------ | -------------------------------------------------------------- |
| **Provider** | DeepSeek                                                       |
| **Families** | `deepseek-v4`, `deepseek-v3`, `deepseek-r1`, `deepseek-prover` |
| **Modality** | Chat                                                           |
| **Input**    | Text                                                           |
| **Output**   | Text                                                           |

## Models

* `deepseek/deepseek-v4-pro`
* `deepseek/deepseek-v4-pro-0813`
* `deepseek/deepseek-v4-flash`
* `deepseek/deepseek-r1-0528`
* `deepseek/deepseek-v3-0324`
* `deepseek/deepseek-v3.2-exp`
* `deepseek/deepseek-v3.1-terminus`
* `deepseek/deepseek-v3.1`
* `deepseek/deepseek-v3.2`
* `deepseek/deepseek-r1-turbo`
* `deepseek/deepseek-v3-turbo`
* `deepseek/deepseek-prover-v2-671b`
* `deepseek/deepseek-r1-distill-llama-70b`
* `deepseek/deepseek-r1-distill-llama-8b`

Pricing is deliberately not reproduced here. Rates are set per model in the
RouterBase catalogue and can be overridden per account, so any figure copied
into this page is a snapshot that goes stale the next time a rate changes.
Fetch the current rate for any model from the [Models API](/api-reference/models):

```http theme={null}
GET /api/models/{model}/pricing
```

URL-encode the slash in the model id — e.g. `deepseek%2Fdeepseek-v4-pro`.

## Endpoint

```http theme={null}
POST https://routerbase.com/v1/chat/completions
```

Drop-in compatible with the OpenAI [Chat Completions API](https://platform.openai.com/docs/api-reference/chat) —
point your OpenAI client at `https://routerbase.com/v1` with your
RouterBase key. See the [Chat Completions reference](/api-reference/chat-completions)
for every supported parameter.

## Quickstart

```bash theme={null}
curl https://routerbase.com/v1/chat/completions \
  -H "Authorization: Bearer $ROUTERBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek/deepseek-v4-pro",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
```