<!-- Lazu · DeepSeek V4 Pro · https://lazu.ai/models/deepseek/deepseek-v4-pro -->

# DeepSeek V4 Pro (`deepseek-v4-pro`)

Call deepseek-v4-pro on Lazu for $0.825 per million input tokens and $2.48 per million output tokens. 1M context, up to 384k output tokens, with Tool calling, Reasoning, Structured output and Prompt caching.

DeepSeek V4 Pro with reasoning, tool calling and context caching; image input is not supported.

## Facts

- **Context:** 1M
- **Max output:** 384k
- **Input:** Text
- **Output:** Text
- **Endpoints:** /v1/chat/completions · /v1/responses

## Prices (USD per million tokens)

| Lane | Input | Output | Cache read | Cache write 5m | 7-day availability |
|---|---|---|---|---|---|
| DeepSeek official price | $0.66 | $1.98 | — | — | — |
| Stable | $0.825 | $2.48 | $0.0275 | — | 100.0% |

Prices checked 2026-10-03 17:34 UTC

## Capabilities

Tool calling, Reasoning, Structured output, Prompt caching

Reasoning effort: low, high, max

## Example request (POST /v1/chat/completions)

```bash
curl -X POST https://api.lazu.ai/v1/chat/completions \
  -H "Authorization: Bearer $LAZU_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek-v4-pro",
    "messages": [{ "role": "user", "content": "Hello from Lazu" }]
  }'
```

Any OpenAI SDK works: set `base_url` to `https://api.lazu.ai/v1`. Docs: https://lazu.ai/docs

## Questions

### What is the difference between the stable and discount lanes?

The stable lane runs on each maker's official API, is billed at the list price, has the highest availability and suits every use. The discount lane is a reverse-engineered route: a third-party supplier serves the model through its official client, not the official API. It costs far less, but availability varies, a failed request does not fall back to the stable lane, and the supplier may add its own system prompt. So use it only inside the matching agent tool: Claude models in Claude Code, GPT models in Codex, Gemini models in Antigravity. For your own code, or anywhere the output must be controlled exactly, use the stable lane. Both lanes work with the same key, and each key picks the lane per model.

### Can I call deepseek-v4-pro with the OpenAI SDK?

Yes. Point the SDK's base URL at https://api.lazu.ai/v1 and use deepseek-v4-pro as the model name.

### How is it billed?

Per token actually used — input, output and cache — deducted from your wallet balance. There is no monthly fee, and every request shows up itemized in your usage log.