DeepSeek V4.1 Flash

by DeepSeek

DeepSeek V4.1 Flash is a 552B-parameter mixture-of-experts model. It activates 8B parameters for input tokens and 16B for output tokens. The model handles coding, reasoning, images, and tool use, with a 1,048,576-token context window. Its smaller KV cache can also reduce costs for long-running requests that reuse context.

Best for: Fast coding agents that need image input and a long context.

1M context

Text
Reasoning
Tool use
Image input
Vision

Model weights

Try it in the playground

Pricing

USD per 1M tokens. Cheapest input plus output first (refreshed hourly).

Provider	Input	Cached input	Output
Boundless	$0.20	$0.01	$1.00
Baseten	$0.30	$0.007	$1.20
DigitalOcean	$0.30	$0.006	$1.20
Fireworks	$0.30	$0.006	$1.20
Together AI	$0.30	$0.006	$1.20

What one request costs

Prompt94Ktokens

Cached prefix66Ktokens

Reply2Ktokens

$0.0078

per request to DeepSeek V4.1 Flash

Prompt: 72.3%
Cached: 8.4%
Reply: 19.2%

The same request, across other models