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# DeepSeek V4.1 Flash 1017

> Post-trained 1017 release with stronger coding and agent results, faster task completion, shorter outputs, image input, and a 1M context window.

![DeepSeek V4.1 Flash 1017](https://media.empiriolabs.ai/model-logos/deepseek.png)

[DeepSeek](/providers/deepseek) · Text Generation

`POST /v1/chat/completions`

Post-trained 1017 release with stronger coding and agent results, faster task completion, shorter outputs, image input, and a 1M context window.

## At a glance

| Field               | Value                                                                                                                                  |
| ------------------- | -------------------------------------------------------------------------------------------------------------------------------------- |
| Model id            | `deepseek-v4-1-flash-1017`                                                                                                             |
| Model release date  | 2026-10-17                                                                                                                             |
| Input modalities    | Text, Image                                                                                                                            |
| Output modalities   | Text                                                                                                                                   |
| Context window      | 1M                                                                                                                                     |
| Weight precision    | -                                                                                                                                      |
| Max output tokens   | 393,216                                                                                                                                |
| Region              | Singapore                                                                                                                              |
| Features            | reasoning, vision, function_calling, agentic_coding                                                                                    |
| Native inference    | No                                                                                                                                     |
| New                 | Yes                                                                                                                                    |
| Structured output   | JSON Mode                                                                                                                              |
| Supported endpoints | `POST /v1/chat/completions`, `POST /v1/responses`, `POST /v1/messages`, `POST /v1beta/models/deepseek-v4-1-flash-1017:generateContent` |
| Alternate model ids | `deepseek-v4.1-flash-1017`, `deepseek/deepseek-v4-1-flash-1017`, `deepseek-ai/deepseek-v4-1-flash-1017`                                |

## Pricing

| Charge              | Spec                    | Rate    |
| ------------------- | ----------------------- | ------- |
| Input               | per 1M prompt tokens    | \$0.30  |
| Output              | per 1M generated tokens | \$1.20  |
| Web Search (Linkup) | per call when invoked   | \$0.013 |

## Example request

```bash
curl https://api.empiriolabs.ai/v1/chat/completions \
  -H 'Authorization: Bearer $EMPIRIOLABS_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"model": "deepseek-v4-1-flash-1017", "messages": [{"role":"user","content":"Hello"}]}'
```

## Parameters

| Parameter            | Type    | Required | Default    | Description                                                                                                                                                                                                                                                                                                       |
| -------------------- | ------- | -------- | ---------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `temperature`        | number  | no       | `0.7`      | Sampling temperature. 0 = deterministic, 2 = maximum randomness. · Range: 0 – 2                                                                                                                                                                                                                                   |
| `top_p`              | number  | no       | `0.9`      | Nucleus sampling probability mass. Lower = more focused. · Range: 0 – 1                                                                                                                                                                                                                                           |
| `max_tokens`         | number  | no       | `4096`     | Maximum output tokens. · Range: 1 – 393216                                                                                                                                                                                                                                                                        |
| `stop`               | string  | no       | -          | Up to 4 strings where the model will stop generating further tokens.                                                                                                                                                                                                                                              |
| `enable_thinking`    | boolean | no       | true       | Enable step-by-step reasoning before answering.                                                                                                                                                                                                                                                                   |
| `thinking_budget`    | number  | no       | `32768`    | Maximum tokens reserved for the reasoning process. Up to 393216. · Range: 1 – 393216                                                                                                                                                                                                                              |
| `reasoning_effort`   | enum    | no       | `"medium"` | Reasoning effort level. none disables thinking. low, medium, high, and max set bounded thinking budgets sized to the selected model. Sent as an OpenAI-style reasoning_effort field, translated into enable_thinking and thinking_budget for the model service. · Allowed: `none`, `low`, `medium`, `high`, `max` |
| `response_format`    | enum    | no       | -          | Return the output as a valid JSON object (JSON mode). Describe the fields you want in your prompt.                                                                                                                                                                                                                |
| `web_search_linkup`  | boolean | no       | false      | Optional web search powered by Linkup. When enabled, recent web sources are retrieved using your latest user message as the query and provided to the model as additional context. Adds \$0.013 per call when invoked on top of the model's normal token cost. Disabled by default.                               |
| `disable_formatting` | boolean | no       | false      | When enabled, the gateway will not append the "Sources" footer to assistant responses that used Linkup web search. Useful when the model output is piped to another system that expects no decoration.                                                                                                            |

## Notes

Thinking is enabled by default and can be disabled. Reasoning tokens are billed as output tokens. Image input is accepted alongside text. JSON mode is supported. Strict JSON Schema output is not available on this model. Optional Linkup web search is billed only when invoked.

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*Machine-readable schema:* `GET https://api.empiriolabs.ai/v1/models/deepseek-v4-1-flash-1017`.