DeepSeek / deepseek-v4.1-flash
DeepSeek V4.1 Flash stands out for Native visual understanding; 1M context and 1M context. It is best suited to Multimodal agent workflows; Long-context coding and review; Visual document understanding and Long-context coding and review.
Context
1M
token
Input
$0.24
/ 1M tokens
Output
$0.96
/ 1M tokens
Quality
—
No score
Overview
DeepSeek V4.1 Flash stands out for Native visual understanding; 1M context and 1M context. It is best suited to Multimodal agent workflows; Long-context coding and review; Visual document understanding and Long-context coding and review.
Tool calling
Can call tools or functions, so product flows can connect model output to backend actions.
Streaming
Supports streamed responses for chat, assistants, and interfaces that need visible incremental output.
Prompt cache
Supports prompt caching patterns for repeated context and longer production conversations.
Reasoning
Better suited for multi-step analysis, planning, and tasks that need deliberate reasoning.
Structured output
Can return machine-readable structures for extraction, automation, and application logic.
Multimodal
Supports mixed text-image input and can use a 1M-token context window for longer material.
Model maker
DeepSeek
Called through SeaLink's unified account, balance, and OpenAI-compatible API.
Protocol
OpenAI-compatible Chat Completions
Base URL: https://api.sealink.io/v1
Pricing
Light production run
100K input + 25K output
$0.048
Higher-volume run
1M input + 250K output
$0.48
The final charge follows generated usage and the applicable selector, such as resolution, duration, input type, or provider unit.
API
model
deepseek-v4.1-flashbase_url
https://api.sealink.io/v1Auth
Bearer $SEALINK_API_KEYcurl https://api.sealink.io/v1/chat/completions \-H "Authorization: Bearer $SEALINK_API_KEY" \-H "Content-Type: application/json" \-d '{"model": "deepseek-v4.1-flash","messages": [{"role": "user", "content": "Hello."}]}'
from openai import OpenAIclient = OpenAI(base_url="https://api.sealink.io/v1", api_key="<your-sealink-key>")resp = client.chat.completions.create(model="deepseek-v4.1-flash",messages=[{"role": "user", "content": "Hello."}],)print(resp.choices[0].message.content)
import OpenAI from "openai";const client = new OpenAI({baseURL: "https://api.sealink.io/v1",apiKey: process.env.SEALINK_API_KEY,});const resp = await client.chat.completions.create({model: "deepseek-v4.1-flash",messages: [{ role: "user", content: "Hello." }],});console.log(resp.choices[0].message.content);