DeepSeek: DeepSeek V4.1 Flash

Name: DeepSeek: DeepSeek V4.1 Flash
Author: OpenRouter

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.

Context

1.0M

Max output

944K

Input price

$0.3/1M tokens

Output price

$1.2/1M tokens

Capabilities

vision

tool call

structured output

reasoning

json mode

streaming

fine tuning

batch

Details

Model IDdeepseek/deepseek-v4.1-flash

ProviderOpenRouter

CreatorDeepSeek

Familydeepseek

License—

Parameters—

Status—

Input modalitiestext, image

Output modalitiestext

Architecture—

Knowledge cutoff—

Training data cutoff—

Release date2026-09-10

Deprecation date—

Typechat

Reasoning tokens—

Max input—

Open weight—

Sourceofficial

Last updated2026-10-05

Tools

Function Callingfunction_calling

Call external functions and APIs

Pricing

Input

$0.3

↑9900%$0

Output

$1.2

↓50%$2.4

Cache write

—

Cache read

$0.01

↑100%$0

Batch in

—

Batch out

—

Price history · $/1M input

$0.3

Sep 14Oct 5

Date	Input	Output	Cache read	Change
Sep 11, 2026	$0.3	$1.2	$0.006	—
Sep 12, 2026265df08	$0.15	$0.6	$0.003	↓50%
Sep 14, 202620b7699	$0.3	$1.2	$0.006	↑100%
Sep 19, 20263170597	$0.15	$0.6	$0.003	↓50%
Sep 21, 2026af38e5c	$0.3	$1.2	$0.006	↑100%
Sep 23, 202628ec4f5	$0.04	$0.64	$0.016	↓87%
Sep 24, 2026118451a	$0.14	$0.42	$0.004	↑250%
Sep 25, 202699b2555	$0.3	$1.2	$0.006	↑114%
Sep 26, 20269cb03f8	$0.14	$0.42	$0.004	↓53%
Sep 27, 20266ba56d7	$0.035	$0.29	$0.001	↓75%
Sep 28, 2026f41f4c4	$0.03	$0.6	$0.029	↓14%
Sep 29, 20261a66bb0	$0.3	$1.2	$0.006	↑900%
Oct 1, 20268c801e2	$0.027	$0.6	$0.027	↓91%
Oct 2, 20262b89bf1	$0.015	$0.75	$0.015	↓44%
Oct 3, 202602333c9	$0.3	$1.2	$0.006	↑1900%
Oct 4, 20268c3d4a3	$0.003	$2.4	$0.003	↓99%
Oct 5, 2026632cde3	$0.3	$1.2	$0.006	↑9900%

Price across providers

Provider	Input	Output	Since launch
Vercel AI Gatewaycheapest	$0.02	$0.38	↓87%
Novita AI	$0.3	$1.2	—
OpenRouter	$0.3	$1.2	—

Family Comparison: deepseek

Model	Caps	Perf	Speed	Context	Max out	Pricing
DeepSeek: DeepSeek V4 Flash 0731 (free)	RVTS	—	—	1.0M	393K
DeepSeek: DeepSeek V4 Flash (free)	RVTS	—	—	1.0M	384K
DeepSeek: DeepSeek Flash Latest	RVTS	—	—	1.0M	944K	$0$2.4
DeepSeek: DeepSeek V4 Flash Latest	RVTS	—	—	1.0M	944K	$0.02$1.28
DeepSeek: DeepSeek V4 Flash 0731	RVTS	—	—	1.0M	944K	$0.02$1.28
DeepSeek: DeepSeek V4 Flash 0423	RVTS	—	—	1.0M	944K	$0.03$1.28
DeepSeek: DeepSeek V4 Flash 0731 (batch)	RVTS	—	—	1.0M	944K	$0.11$0.33
DeepSeek: DeepSeek V4 Flash Vision Exp (batch)	RVTS	—	—	1.0M	944K	$0.11$0.33
DeepSeek: DeepSeek V4.1 Flash (batch)	RVTS	—	—	1.0M	131K	$0.11$0.34
Nex AGI: DeepSeek V3.1 Nex N1	RVTS	—	—	131K	164K	$0.14$0.5
DeepSeek: DeepSeek Pro Latest	RVTS	—	—	1.0M	393K	$0.19$4.2
DeepSeek: DeepSeek V4 Pro 0423	RVTS	—	—	1.0M	384K	$0.21$0.42
DeepSeek: DeepSeek V4 Flash Vision Exp	RVTS	—	—	1.0M	262K	$0.22$0.65
DeepSeek: DeepSeek V3.1 Terminus	RVTS	—	—	164K	147K	$0.27$1
DeepSeek: DeepSeek V3.2 Exp	RVTS	—	—	164K	147K	$0.27$0.41
DeepSeek: DeepSeek V3.2	RVTS	—	—	164K	66K	$0.28$0.42
DeepSeek: DeepSeek V3.2 Speciale	RVTS	—	—	164K	164K	$0.29$0.43
DeepSeek: DeepSeek V4.1 Flash	RVTS	—	—	1.0M	944K	$0.3$1.2
DeepSeek: DeepSeek V4 Pro 0813	RVTS	—	—	1.0M	944K	$0.45$5
DeepSeek: DeepSeek V4 Pro 0813 (batch)	RVTS	—	—	1.0M	944K	$0.66$1.98

API

GET/v1/models/openrouter/deepseek/deepseek-v4.1-flash