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Specs

Model IDdeepseek/deepseek-v4.1-flash-1017
Context window1M tokens
Inputs → outputsText, Image → Text
Open weightsYes

How to use DeepSeek: DeepSeek V4.1 Flash 1017 in your app

The quickest way is through an API gateway such as OpenRouter, which uses the same format as the OpenAI API. Create a key, then send a request with the model ID deepseek/deepseek-v4.1-flash-1017:

curl https://openrouter.ai/api/v1/chat/completions \ -H "Authorization: Bearer $OPENROUTER_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "deepseek/deepseek-v4.1-flash-1017", "messages": [{"role": "user", "content": "Explain this in simple words..."}] }'

Prefer no code? Many tools in our AI tools directory run on models like this one.

Questions about DeepSeek: DeepSeek V4.1 Flash 1017

What is DeepSeek: DeepSeek V4.1 Flash 1017?

DeepSeek V4.1 Flash 1017 is the October 17, 2026 snapshot of DeepSeek V4.1 Flash, served by DeepSeek under the `deepseek-flash` API model name. V4.1 Flash is a sparse mixture-of-experts model...

How big is the context window of DeepSeek: DeepSeek V4.1 Flash 1017?

DeepSeek: DeepSeek V4.1 Flash 1017 can read up to 1,048,576 tokens in one request, roughly 786,432 words.

Is DeepSeek: DeepSeek V4.1 Flash 1017 open source?

DeepSeek: DeepSeek V4.1 Flash 1017 has open weights, so you can download and run it yourself, subject to its licence.

What can DeepSeek: DeepSeek V4.1 Flash 1017 take as input?

DeepSeek: DeepSeek V4.1 Flash 1017 accepts text, image and produces text.

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Specs and prices come from OpenRouter and the provider, and are refreshed daily. Last checked 17 Oct 2026.

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