DeepSeek

DeepSeek V4.1 Flash

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.

Try DeepSeek V4.1 Flash See alternatives

At a glance

Input / 1M: $0.30
Output / 1M: $1.20
Context: 1.05M
Max output: 944K
Intelligence: 39.5
Released: Sep 2026

Text inputImage inputReasoningTool calling

Pricing

DeepSeek V4.1 Flash API pricing

Per-token rates, plus what common tasks actually cost.

Input tokensPer 1M tokens	$0.30
Output tokensPer 1M tokens	$1.20
Cached input (read)Per 1M tokens	$0.01
Cache writePer 1M tokens	Not available

Chat message

2K in, 500 out

$1.20

per 1,000 requests

Coding task

30K in, 4K out

$13.80

per 1,000 requests

Long document summary

150K in, 2K out

$47.40

per 1,000 requests

Benchmarks

DeepSeek V4.1 Flash benchmark scores

Independent scores from Artificial Analysis. Higher is better.

Intelligence index

39.5

Coding index

Not available

Agentic index

Not available

Specs

Context window and capabilities

What it can read, what it can write, and which API features it supports.

Context window: 1.05M tokens
Max output: 944K tokens
Input types: Image, Text
Output types: Text
Reasoning effort: Max, High, Low
Release date: September 10, 2026

Tool calling
Structured outputs
JSON mode
Reasoning
Temperature
Stop sequences
Deterministic seed
Verbosity control

Compare

DeepSeek V4.1 Flash vs other models

All comparisons

See how DeepSeek V4.1 Flash stacks up head to head on price, benchmarks, and features.

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Alternatives

DeepSeek V4.1 Flash alternatives

All alternatives

Similar models worth considering, and where each one has the edge.

Xiaomi

MiMo-V2.6-Pro

1.4x cheaper outputHigher intelligence scoreLarger 1.05M context

View MiMo-V2.6-Pro

Z.ai

GLM 5.3 Flash

2.4x cheaper outputHigher intelligence scoreAccepts video

View GLM 5.3 Flash

Google

Gemini 3.8 Flash

Higher intelligence scoreAccepts video and file and audio

View Gemini 3.8 Flash

Want to learn about other models? Browse all models

FAQ

Frequently asked questions

How much does DeepSeek V4.1 Flash cost?

DeepSeek V4.1 Flash costs $0.30 per 1M input tokens and $1.20 per 1M output tokens through the API. A typical chat message costs about $1.20 per 1,000 messages.

What is the context window of DeepSeek V4.1 Flash?

DeepSeek V4.1 Flash accepts up to 1.05M tokens of input and can write up to 944K tokens in a single response.

What is the best alternative to DeepSeek V4.1 Flash?

MiMo-V2.6-Pro from Xiaomi is a strong alternative. It offers: 1.4x cheaper output, higher intelligence score, larger 1.05m context.

Can I use DeepSeek V4.1 Flash alongside other models?

Yes. Shortcut Chat sends one prompt to DeepSeek V4.1 Flash and any other models you pick at the same time, so you can compare answers side by side.

Try DeepSeek V4.1 Flash next to every other model.

Use DeepSeek V4.1 Flash alongside all the other models. Use one at a time, or multiple together. Get the best answer from every AI.

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