# DeepSeek V4.1 Flash 1017

> DeepSeek V4.1 Flash 1017 is the October 17, 2026 snapshot of DeepSeek V4.1 Flash, served by DeepSeek under the `deepseek-flash` API model name. Sparse mixture-of-experts with native vision in, text out, and a 1M-token context window. Hosts bill it as its own model: OpenRouter lists it at $0.15 / $0.60 per 1M input / output tokens, against $0.04 / $0.144 for the original September checkpoint `deepseek/deepseek-v4.1-flash`.

**ID**: `deepseek/deepseek-v4.1-flash-1017`  
**Creator**: DeepSeek  
**Category**: text  
**Context**: 1M tokens  
**Pricing**: $0.07 / $0.30 per 1M · billed by your provider (BYOK)  
**Released**: 2026-10-17  
**Web page**: https://anyrouter.dev/model/deepseek/deepseek-v4.1-flash-1017

**Input modalities**: text, image  
**Output modalities**: text  

**Capabilities**: chat, streaming, function-calling, coding, reasoning, vision

**Aliases**: `deepseek-flash`, `deepseek-v4.1-flash-1017`

## Usage

**Endpoint**: `POST https://anyrouter.dev/api/v1/chat/completions`

```bash
curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "deepseek/deepseek-v4.1-flash-1017",
  "messages": [
    {
      "role": "user",
      "content": "Say hi in 3 words."
    }
  ]
}'
```

## Providers

| Provider | Input | Output |
| --- | --- | --- |
| openrouter-byok | $0.15/M (list) | $0.60/M (list) |
| deepseek-byok | $0.30/M (list) | $1.20/M (list) |
| vercel-byok | $0.07/M (list) | $0.30/M (list) |
| deepinfra-byok | $0.20/M (list) | $0.60/M (list) |
| nousresearch-byok | $0.15/M (list) | $0.60/M (list) |
| aihubmix-byok | $0.15/M (list) | $0.62/M (list) |

BYOK routes are billed by your own provider key — AnyRouter charges $0. Rates marked (list) are the provider's published list price.

## Source

- Upstream docs: https://openrouter.ai/deepseek/deepseek-v4.1-flash-1017