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DeepSeek: DeepSeek V4.1 Flash 1017 Private

deepseek-v4.1-flash-private

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DeepSeek V4.1 Flash 1017 Private costs $0.780 per million input tokens and $1.89 per million output tokens, supports 1.05M context, and is available through the OpenAI-compatible API.

DeepSeek V4.1 Flash's October 17, 2026 checkpoint (1017) supports text and image input, reasoning, tool calling, and structured output with a 1M-token context window. Tinfoil lists this model as experimental, with availability subject to change.

Modalities

Text + Image → Text

Input / output price

$0.780 / $1.89 per 1M

Context

1.05M · max output 384K

Capabilities

ReasoningVisionTool callingLong contextOpen weights

Pricing

Billed per token actually used and deducted from your credits.

ItemUSD per 1M tokens
Input$0.780
Output$1.89
Cached input$0.013

Calculator

Drag the sliders to estimate what this model will cost.

Per request
$0.00385
Per day
$1.92
Per month (30 days)
$57.72

DeepSeek V4.1 Flash 1017 Private: input $0.78/M · output $1.885/M · cached input $0.013/M

Request with these settings
curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "deepseek-v4.1-flash-private", "max_tokens": 800,
       "messages": [{"role": "user", "content": "…"}]}'

Code samples

OpenAI-compatible. Set the base URL to https://api.geniusrelaygpt.com/v1 and the model to deepseek-v4.1-flash-private.

curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek-v4.1-flash-private",
    "stream": true,
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Use it in a client: Cursor · Cline · SillyTavern · Codex

Parameters

Common OpenAI parameters can be passed as-is.

temperaturetop_pmax_tokensstreamstoppresence_penaltyfrequency_penaltyseed

FAQ

How is DeepSeek V4.1 Flash 1017 Private billed?
Input is $0.780 and output is $1.89 per million tokens; cached input is $0.013. The charge for every request is listed in Usage Logs in the console.
How long is the context window?
1.05M tokens. In a long conversation every turn is billed for the full input, so keep the history under control.
Does it support streaming?
Yes. Add "stream": true to the request to receive server-sent events in the OpenAI format.
DeepSeek V4.1 Flash 1017 Private API pricing · GeniusRelay