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DeepSeek V4.1 Flash

Very low price, can be downloaded and run yourself, and reads a very large amount at once. Hard to beat for big batches of work.

Last updated October 16, 2026.

Costs here use the prices AI companies charge software developers, so they show relative cost, not your monthly bill. See what ChatGPT, Claude and Gemini charge you.

Made by DeepSeek. Everyday and cheap.

What it costs

1,000-word essay: under 1 cent
100 chat messages: $0.19 (about 19 cents)
50-page PDF summary: $0.01 (about 1 cent)

Based on list prices and the assumptions on How we work. Your real cost will differ.

At a glance

Smartness: ★★★☆☆ (3 of 5) (our banding of the Artificial Analysis score, where available)
Reads at once: about 1,570 pages (rule of thumb)
Understands: text, pictures
Free to download and run yourself: Yes
Free to use: Not free for developers. Free app plans

Best for

big batcheslow cost

Watch out for

The price on the listing changes by day of the week. Running it yourself takes serious computer hardware.

Picked for

Study

Appears in

Frequently asked

How much does DeepSeek V4.1 Flash cost to use?
A 1,000-word essay costs about under 1 cent; summarizing a 50-page PDF about $0.01 (about 1 cent). These are developer (API) prices, not an app subscription.

What is DeepSeek V4.1 Flash best for?
Very low price, can be downloaded and run yourself, and reads a very large amount at once. Hard to beat for big batches of work.

How much can DeepSeek V4.1 Flash read at once?
About 1,570 pages (a rule of thumb: 1,048,576 tokens at roughly 500 words a page).

Can I download DeepSeek V4.1 Flash for free?
Yes, the model files are published, though running a large one needs powerful hardware.

Under the hood

Maker	DeepSeek
Price per 1M input tokens	$0.15 (changes with input length or day of week)
Price per 1M output tokens	$0.60
Context size	1.05M tokens (1,048,576)
Artificial Analysis Intelligence Index	39.5 (source, via OpenRouter)
Open weights	Yes (Hugging Face: deepseek-ai/DeepSeek-V4.1-Flash)
Speed	Not measured yet
Listed	2026-09-10

Maker's description (technical)

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...

View on OpenRouter. Our verdict above is editorial, not benchmarked by us.