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DeepSeek: DeepSeek V3.1 Thinking

deepseek-v3.1:thinking

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DeepSeek V3.1 Thinking costs $0.260 per million input tokens and $0.910 per million output tokens, supports 128K context, and is available through the OpenAI-compatible API.

Thinking enabled version of Deepseek V3.1. DeepSeek-V3.1 is a hybrid model that supports both thinking mode and non-thinking mode. It does better at tool calling and agent tasks, and has higher thinking efficiency than its predecessor. Quantized at FP8.

Modalities

Text → Text

Input / output price

$0.260 / $0.910 per 1M

Context

128K · max output 66K

Capabilities

ReasoningTool callingOpen weights

Pricing

Billed per token actually used and deducted from your credits.

ItemUSD per 1M tokens
Input$0.260
Output$0.910
Cached input$0.130

Calculator

Drag the sliders to estimate what this model will cost.

Per request
$0.00151
Per day
$0.7540
Per month (30 days)
$22.62

DeepSeek V3.1 Thinking: input $0.26/M · output $0.91/M · cached input $0.13/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-v3.1:thinking", "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-v3.1:thinking.

curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek-v3.1:thinking",
    "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 V3.1 Thinking billed?
Input is $0.260 and output is $0.910 per million tokens; cached input is $0.130. The charge for every request is listed in Usage Logs in the console.
How long is the context window?
128K 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 V3.1 Thinking API pricing · GeniusRelay