deepseek

DeepSeek: DeepSeek V4.1 Flash

deepseek/deepseek-v4.1-flash

DeepSeek V4.1 Flash is a sparse mixture-of-experts model from DeepSeek, and the first built on the company's Causal Encoder-Decoder (CED) architecture. It activates 8B parameters on input and 16B on...

text

Try in Playground ↗

Input / 1M tokens$0.3

Output / 1M tokens$1.2

Context window1,048,576

Maximum output384,000

Provider-supported parameters

These are upstream capabilities. Jevrouter supports the subset described in the API contract; chat input is currently text only.

frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokensmin_ppresence_penaltyreasoningreasoning_effortrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_pstreamdeveloper_role

Capabilities are imported from OpenRouter’s catalog. This does not mean every model has been independently tested by Jevrouter.

Catalog updated: 2026-09-22T08:51:50.371Z · Price version: cmucbgb9y01f9j30zmefhykop:5

Provider pricing fields · USD per indicated unit

{
  "prompt": "0.0000003",
  "completion": "0.0000012",
  "overrides": [
    {
      "prompt": "0.00000015",
      "utc_days": [
        "saturday",
        "sunday"
      ],
      "completion": "0.0000006",
      "input_cache_read": "0.000000003"
    },
    {
      "prompt": "0.00000015",
      "utc_end": 100,
      "utc_days": [
        "monday",
        "tuesday",
        "wednesday",
        "thursday",
        "friday"
      ],
      "utc_start": 0,
      "completion": "0.0000006",
      "input_cache_read": "0.000000003"
    },
    {
      "prompt": "0.0000003",
      "utc_end": 400,
      "utc_days": [
        "monday",
        "tuesday",
        "wednesday",
        "thursday",
        "friday"
      ],
      "utc_start": 100,
      "completion": "0.0000012",
      "input_cache_read": "0.000000006"
    },
    {
      "prompt": "0.00000015",
      "utc_end": 600,
      "utc_days": [
        "monday",
        "tuesday",
        "wednesday",
        "thursday",
        "friday"
      ],
      "utc_start": 400,
      "completion": "0.0000006",
      "input_cache_read": "0.000000003"
    },
    {
      "prompt": "0.0000003",
      "utc_end": 1000,
      "utc_days": [
        "monday",
        "tuesday",
        "wednesday",
        "thursday",
        "friday"
      ],
      "utc_start": 600,
      "completion": "0.0000012",
      "input_cache_read": "0.000000006"
    },
    {
      "prompt": "0.00000015",
      "utc_end": 0,
      "utc_days": [
        "monday",
        "tuesday",
        "wednesday",
        "thursday",
        "friday"
      ],
      "utc_start": 1000,
      "completion": "0.0000006",
      "input_cache_read": "0.000000003"
    }
  ],
  "input_cache_read": "0.000000006"
}

Make a request

curl --no-buffer https://api.jevrouter.io/v1/chat/completions \
  -H "Authorization: Bearer $JEVROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d @- <<'JSON'
{
  "model": "deepseek/deepseek-v4.1-flash",
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ],
  "max_tokens": 1024
}
JSON

Plan your integration

Connect with the OpenAI Python SDK →Estimate this model’s cost →Budgets, request status and safe retries →

Source: OpenRouter model catalog. Imported descriptions and capabilities are provider declarations, not independent benchmark results. Jevrouter currently uses OpenRouter as its managed upstream.