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DeepSeektext2 routes

DeepSeek V4.1 Flash

DeepSeek's fast, low-cost model, with native image understanding.

deepseek-v4.1-flashGet API key

Pricing USD per million tokens

TokensPer 1M tokens
Input$0.09
Cached input$0.0018
Cache write (5 min)$0.09
Cache write (1 hour)$0.18
Output$0.36

Requests made weekdays 09:00-12:00 and 14:00-18:00 Beijing time (UTC+8) are billed at 2× these rates. Reasoning tokens are billed as output. Each answer's usage carries cost_usd, the amount taken from your balance; a request with no answer costs $0.00.

Request

curl
curl https://api.revana.si/v1/chat/completions \
  -H "Authorization: Bearer $REVANA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"deepseek-v4.1-flash","messages":[{"role":"user","content":"Write a haiku about routing."}]}'
Python
import os
from openai import OpenAI

client = OpenAI(base_url="https://api.revana.si/v1", api_key=os.environ["REVANA_API_KEY"])
reply = client.chat.completions.create(
    model="deepseek-v4.1-flash",
    messages=[{"role": "user", "content": "Write a haiku about routing."}],
)
print(reply.choices[0].message.content)

Any OpenAI SDK works: set the base URL to https://api.revana.si/v1. Streaming, tools and the rest are in the chat completions docs.

Details

Model id
deepseek-v4.1-flash
Maker
DeepSeek
Endpoint
POST /v1/chat/completions
Context window
1M tokens
Max output
393K tokens
Streaming
Yes (server-sent events)
Routes
2 (falls back automatically)

2 routes

Every request starts on the cheapest route. A busy or failed route hands it to the next before any answer is sent.

About the DeepSeek V4.1 Flash API

How much does the DeepSeek V4.1 Flash API cost?

DeepSeek V4.1 Flash costs $0.09 per million input tokens, $0.0018 per million cached input tokens and $0.36 per million output tokens on Revana. Requests made weekdays 09:00-12:00 and 14:00-18:00 Beijing time (UTC+8) are billed at 2× these rates. You pay from prepaid credit for the tokens each request used, with no subscription or minimum.

How do I call DeepSeek V4.1 Flash from code?

Use any OpenAI SDK with base URL https://api.revana.si/v1 and your Revana API key, and set model to "deepseek-v4.1-flash". POST /v1/chat/completions takes the OpenAI request body, streamed or not.

What happens if a request fails?

Revana has 2 routes for DeepSeek V4.1 Flash and moves a request to the next one when a route is busy or down. A request that gets no answer costs nothing.

Is DeepSeek V4.1 Flash on Revana the same model?

Yes. Revana passes your request to DeepSeek's model unchanged and returns its answer in the OpenAI format, with the usage it reported and what the request cost.

More from DeepSeek

Also as markdown for agents. Every language model and price: llms.json.