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DeepSeek: DeepSeek V4 Pro (April preview)

deepseek-v4-pro-20260423

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DeepSeek V4 Pro (April preview) costs $1.13 per million input tokens and $2.31 per million output tokens, supports 1.05M context, and is available through the OpenAI-compatible API.

DeepSeek V4 Pro April preview (2026-04-23), the first V4 Pro checkpoint: a large-scale Mixture-of-Experts model with a 1M-token context window for reasoning, coding, long-horizon agent workflows, knowledge, math and software engineering. Plain DeepSeek V4 Pro now means V4 Pro 0813.

Modalities

Text → Text

Input / output price

$1.13 / $2.31 per 1M

Context

1.05M · max output 384K

Capabilities

ReasoningTool callingLong contextOpen weights

Pricing

Billed per token actually used and deducted from your credits.

ItemUSD per 1M tokens
Input$1.13
Output$2.31
Cached input$0.103

Calculator

Drag the sliders to estimate what this model will cost.

Per request
$0.00524
Per day
$2.62
Per month (30 days)
$78.58

DeepSeek V4 Pro (April preview): input $1.1307/M · output $2.3083/M · cached input $0.1035/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-pro-20260423", "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-pro-20260423.

curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek-v4-pro-20260423",
    "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 Pro (April preview) billed?
Input is $1.13 and output is $2.31 per million tokens; cached input is $0.103. 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 Pro (April preview) API pricing · GeniusRelay