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DeepSeek: DeepSeek V4.1 Flash: AI model

DeepSeek V4.1 Flash is DeepSeek's efficient mixture-of-experts model with native vision from DeepSeek with a 1M-token context window. Reachable from inside Iran through Hormouz.

Context window:
1,048,576 tokens
Input:
$0.04/1M tokens
Output:
$0.77/1M tokens
Type:
text, image
  • Vision
  • Tools
  • Streaming
  • Long context
Good for:Popular for Academia · #1Popular for Finance · #1Popular for Health · #1Popular for Marketing & SEO · #1Ranks are based on global usage data

Thinking levels: max · high · low

DeepSeek V4.1 Flash is the first DeepSeek model on its Causal Encoder-Decoder architecture. From a 552B-parameter backbone it uses only 8B parameters for reading and 16B for writing each token, so compute stays low for its size. Images are understood natively, since text and vision were trained together from the start, and a compressed KV cache needs about a quarter of the memory of the previous Flash generation.

It accepts text and image input and returns text, and supports tool calling, structured JSON output and streaming. Reasoning can be switched on when a problem needs more thought and left off when speed matters. DeepSeek V4.1 Flash is commonly used for coding, terminal and computer-use agents, long multi-step tasks and long-context analysis. Hormouz serves it behind an OpenAI-compatible API: point your base URL at Hormouz, drop in a Hormouz key, and existing OpenAI SDK code runs without changes.

Pricing is usage-based: $0.3 per million input tokens and $1.2 per million output tokens. There is no fixed monthly fee, and you pay only for the tokens you use. Hormouz provides stable access to the model from inside Iran, with no foreign credit card or circumvention tooling required.

DeepSeek V4.1 Flash is a sparse mixture-of-experts model from DeepSeek, and the first built on the company's Causal Encoder-Decoder (CED) architecture. It activates 8B parameters on input and 16B on...

Quickstart

curl https://api.hormouz.net/v1/chat/completions \
  -H "Authorization: Bearer ng-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek/deepseek-v4.1-flash",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Specs

VendorDeepSeek
TypeText, Image
Context window1,048,576 tokens
Pricing$0.04/M in · $0.77/M out
APIChat Completions
CapabilitiesStreaming · Vision · Tools

Benchmarks

39.5
Intelligence Index
Better than 79% of models we compared

Reasoning

HLE
Humanity's Last Exam
39.2%
AA-LCR
Long-context reasoning
84%
CritPt
Research-level physics reasoning
14.3%
AA Omniscience
Broad factual knowledge accuracy
46.4%
Non-Hallucination
Rate of avoiding fabricated answers
3.5%

Coding

SciCode
Python for scientific computing
51.9%

Agentic

GDPval
Economically valuable tasks
55%

Source: Artificial Analysis

Code example

cURL
curl https://api.hormouz.net/v1/chat/completions \
  -H "Authorization: Bearer ng-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek/deepseek-v4.1-flash",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
Python
from openai import OpenAI
client = OpenAI(api_key="ng-YOUR_API_KEY", base_url="https://api.hormouz.net/v1")
response = client.chat.completions.create(
    model="deepseek/deepseek-v4.1-flash",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)
JavaScript
import OpenAI from "openai";
const client = new OpenAI({ apiKey: "ng-YOUR_API_KEY", baseURL: "https://api.hormouz.net/v1" });
const response = await client.chat.completions.create({
  model: "deepseek/deepseek-v4.1-flash",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);

Buy the DeepSeek: DeepSeek V4.1 Flash API, paid in rial

  • Buy credit with an Iranian bank card; no foreign card or account needed.
  • One Hormouz key reaches DeepSeek: DeepSeek V4.1 Flash and 600+ other models, and you pay only for what you use.
  • No VPN and no risk of a banned account; just change the base URL to api.hormouz.net/v1.
Create an accountBuy DeepSeek API access, paid in rial

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FAQ

How much does DeepSeek V4.1 Flash cost?
Pricing is usage-based: $0.3 per million input tokens and $1.2 per million output tokens. There is no fixed monthly fee, and you pay only for the tokens you use.
How do I access DeepSeek V4.1 Flash from inside Iran?
Create an account on Hormouz and generate an API key. Hormouz provides a stable path to the model from inside Iran, with no foreign credit card or circumvention tooling required.
Is DeepSeek V4.1 Flash compatible with OpenAI code?
Yes. Hormouz exposes an OpenAI-compatible API. Point your base URL at Hormouz and swap in your Hormouz key. Your existing SDKs and code run without a rewrite.
What context window and capabilities does DeepSeek V4.1 Flash have?
It has a 1M-token context window, accepts text and image input, and supports tool calling, structured JSON output and streaming. Reasoning can be switched on when a problem needs more thought and left off when speed matters.
What is DeepSeek V4.1 Flash good for?
Typical uses are coding, terminal and computer-use agents, long multi-step tasks and long-context analysis.

Updated 2026-10-13