by DeepSeek

DeepSeek: DeepSeek V4.1 Flash.

multimodal closed 1M ctx
Cheapest input
$0.15/M
on OpenRouter
Cheapest output
$0.6/M
on DeepInfra
Hosted equiv.
~$0.22/hr
@ 100 tok/s on DeepInfra

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...

Hosted API only

No self-host path — closed weights.

DeepSeek: DeepSeek V4.1 Flash's weights aren't published. Use it via the access providers below.

Where to use it

Cheapest hosted endpoints.

Provider Access $/M in $/M out
OpenRouter api aggregator $0.15 $0.6 Launch ↗
DeepInfra hosted inference $0.2 $0.6 Launch ↗
FAQ

Frequently asked.

How do I run DeepSeek: DeepSeek V4.1 Flash?
DeepSeek: DeepSeek V4.1 Flash is a closed-source API model. The cheapest way to access it is through the API providers listed on this page (direct API, aggregators, and hosted chat UIs).
Where can I access DeepSeek: DeepSeek V4.1 Flash?
DeepSeek: DeepSeek V4.1 Flash is available via DeepInfra, OpenRouter. Each access option lists its own pricing (per million tokens or hourly hosting).
How much does it cost to run DeepSeek: DeepSeek V4.1 Flash?
API pricing starts at $0.15/M input tokens and $0.6/M output tokens. Self-hosting cost depends on the GPU you rent — see the Run It Yourself tab.
Is DeepSeek: DeepSeek V4.1 Flash open-source or proprietary?
DeepSeek: DeepSeek V4.1 Flash is a proprietary model from DeepSeek. Access is API-only — there are no public weights to download.