How is the deepseek-v4.1-flash API billed?

deepseek-v4.1-flash is pay-as-you-go from ¥0.4194 / M. The exact rate is listed in the pricing table on this page and billed at EasyAPI's public price, with no subscription required.

How do I call deepseek-v4.1-flash through the API?

EasyAPI exposes an OpenAI-compatible API: create an API key in the console, set base_url to https://token.easyapi.com and model to deepseek/deepseek-v4.1-flash, then send requests to /v1/chat/completions. The Quick Start on this page includes cURL, Python and TypeScript examples; official OpenAI SDKs only need the base_url swapped.

Which request formats does deepseek-v4.1-flash support?

OpenAI Chat Completions format including streaming (stream). Official OpenAI and Anthropic SDKs work by swapping base_url; see the Parameters table on this page for the full list.

How do I get started with deepseek-v4.1-flash?

Sign up for EasyAPI, create an API key in the console and top up your balance to call deepseek-v4.1-flash pay-as-you-go, no subscription needed. You can also try it in the online Playground first, then copy the Quick Start example.

deepseek-v4.1-flash

Name: deepseek-v4.1-flash
Brand: DeepSeek
Price: 0.4194 CNY
Availability: InStock

文本

DeepSeek-V4.1-Flash is DeepSeek's current mainstay model; its official API model name is deepseek-flash. It supports a 1M context and up to 384K output, with thinking and non-thinking modes switchable by default, features image understanding, tool use, and JSON Output, and is compatible with the OpenAI and Anthropic APIs.

Input price

¥0.419458% off

Market: ¥0.9986

/ M

Output price

¥1.677558% off

Market: ¥3.994

/ M

Cache read

¥0.008458% off

Market: ¥0.02

/ M

Input

Text / Image

Output

Text

Peak / off-peak billing

Prices vary by time of day (UTC+8)

Currently peak

Time-of-day price table

Input
Off-peak¥0.4194
Peak hours¥0.8387
Output
Off-peak¥1.6775
Peak hours¥3.355
Cache read
Off-peak¥0.0084
Peak hours¥0.0168

Field	Off-peak	Peak hours
Input	¥0.4194	¥0.8387
Output	¥1.6775	¥3.355
Cache read	¥0.0084	¥0.0168

Peak hours: UTC+8 Mon–Fri (excluding Chinese statutory holidays) 09:00 - 12:00、14:00 - 18:00; all other periods are off-peak. The billing period is based on UTC+8 time when the request completes

API

Quick Start

Drop-in code to call this model with EasyAPI's OpenAI-compatible API.

Get your API key

Create an API key from your dashboard and set it as an environment variable:

Replace sk-xxxxxxxx with your API token from the console (Bearer token).

Create API token

shell

export EASYAPI_API_KEY=sk-xxxxxxxx

Make your first request

Use deepseek/deepseek-v4.1-flash with the EasyAPI API:

cURL

curl https://token.easyapi.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $EASYAPI_API_KEY" \
  -d '{
  "model": "deepseek/deepseek-v4.1-flash",
  "messages": [
    {
      "role": "user",
      "content": "Hello!"
    }
  ]
}'

Enable streaming

Add "stream": true to your request body to receive responses as server-sent events:

curl

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

Endpoint

Sends a chat completion request. Supports streaming and non-streaming modes.

POSThttps://token.easyapi.com/v1/chat/completions

Authorization: Bearer $EASYAPI_API_KEY
Content-Type: application/json
Model: deepseek/deepseek-v4.1-flash

Send a chat completion request, with streaming or non-streaming responses. Docs

GEThttps://token.easyapi.com/v1/models

Authorization: Bearer $EASYAPI_API_KEY

List the models available to the current account. Docs

Parameters

Name	Type	Default	Description
`model`	string	—	Model ID, e.g. openai/gpt-4o or anthropic/claude-3-5-sonnet
`messages`	array	—	List of conversation messages, each with role and content
`stream`	boolean	false	When true, the response is streamed via SSE
`temperature`	float	1	Sampling temperature; higher values are more random
`max_tokens`	integer	—	Maximum number of tokens generated in a single reply
`top_p`	float	1	Nucleus sampling; limits the cumulative probability of candidate tokens
`frequency_penalty`	float	0	Frequency penalty; reduces repeated wording
`presence_penalty`	float	0	Presence penalty; encourages new topics

Using third-party SDKs

Official OpenAI and other SDKs work by swapping the base URL. See integration guide