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DeepSeek·DeepSeek V family
DeepSeek V4.1 Flash
MoEotherReleased Sep 10, 2026
DeepSeek's open-weight sparse mixture-of-experts model and the first built on the company's Causal Encoder-Decoder (CED) architecture, activating 8B parameters on input and 16B on output. Supports image input, reasoning, and tool use with a 1M-token context window at very low per-token cost.
ChatText completionFunction callingVisionCode generationReasoningtext · image · code
Provider (1)
Sorted by total cost (input + output per 1M tokens). Select a row to view provider details.
| Provider | Pricing (per 1M) | Rate limits | Regions | Health | Latency |
|---|---|---|---|---|---|
 | In: $0.02Out: $0.40 | 60 RPM / 200K TPM | us-east-1 | Healthy | 0ms |
Quick start
Use this model via OpenRouter with an OpenAI-compatible SDK.
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://openrouter.ai/api/v1",
apiKey: process.env.OPENROUTER_API_KEY,
});
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);Using OpenRouter API · OpenAI-compatible SDK