DeepSeek V4.1 Flash API

CN DeepSeek | released 2026-10

DeepSeek V4.1 Flash is an interim preview of the next DeepSeek generation built on a new architecture, with native multimodal support, stronger capability, higher speed and lower cost than V4 Flash. A glimpse of where the DeepSeek price-performance curve goes next, already usable in production traffic on MeshTok.

visionFastReasoning

Pricing (official list, per 1M tokens)

Input

$0.15/M

Output

$0.60/M

Specifications

Context window1000K tokens Input modalitiesText StreamingYes APIOpenAI-compatible

How to use DeepSeek V4.1 Flash

Drop-in OpenAI replacement. Change only the base_url and model.

# Python -pip install openai
from openai import OpenAI

client = OpenAI(
    base_url="https://meshtok.com/v1",
    api_key="sk-your-MeshTok-key",
)

resp = client.chat.completions.create(
    model="deepseek/deepseek-v4.1-flash",
    messages=[{"role":"user","content":"Hello!"}],
)
print(resp.choices[0].message.content)

# cURL
curl https://meshtok.com/v1/chat/completions \
  -H "Authorization: Bearer sk-your-MeshTok-key" \
  -H "Content-Type: application/json" \
  -d '{"model":"deepseek/deepseek-v4.1-flash","messages":[{"role":"user","content":"Hello!"}]}'