DeepSeek V4.1 Flash
Pick up to 3 models · pricing, context and capabilities · simulate your product cost
Data updated on September 30, 2026· 217 models
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.
- Reasoning estimated
- Speed estimated
- Input
- Output
- Context
- 1 M tokens
- Max output
- 944 K
- Input, $ per 1M tokens
- $0.300
- Output, $ per 1M tokens
- $1.20
- Cache read, $ per 1M
- $0.006
- Batch (input / output)
- $0.112 / $0.336
- Tool calling
- Yes
- Released
- 09/10/2026
- Knowledge cutoff
- 2025-05
- API id
- deepseek/deepseek-v4.1-flash
Summary from the data
DeepSeek V4.1 Flash is a DeepSeek model available by API since 09/10/2026. It costs $0.300 per million input tokens and $1.20 per million output tokens, accepts 1 M tokens of context and generates up to 944 K tokens per response. Input: text, image; output: text. It has a reasoning mode. It supports tool calling. With 10,000 requests a month of 1,500 input and 400 output tokens it would cost about $9.30 a month.
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What would your product cost?
Estimate the monthly cost with your app's real volume. List prices, no cache or batch discounts.
The 6 cheapest for this scenario (chat, last 12 months)
- 1Lyria 3 Pro Preview Google$0.00
- 2Lyria 3 Clip Preview Google$0.00
- 3Qwen3.7 Flash Qwen$0.97
- 4DeepSeek V4 Flash 0731 DeepSeek$1.55
- 5Ministral 3 3B 2512 Mistral$1.90
- 6Qwen3.5-Flash Qwen$2.02
Frequently asked questions
How much does DeepSeek V4.1 Flash cost per million tokens?
DeepSeek V4.1 Flash costs $0.300 per million input tokens and $1.20 per million output tokens (USD, list price). Cache read: $0.006. Batch tier: $0.112 / $0.336.
What context window does DeepSeek V4.1 Flash have?
DeepSeek V4.1 Flash accepts 1 M tokens of context per request and generates up to 944 K tokens per response.
Does DeepSeek V4.1 Flash accept images, audio or files?
Input: text, image. Output: text.
Does DeepSeek V4.1 Flash have a reasoning mode and tool calling?
It has a reasoning mode. It supports tool calling.
When was DeepSeek V4.1 Flash released and what is its knowledge cutoff?
DeepSeek V4.1 Flash has been available by API since 09/10/2026. Knowledge cutoff: 2025-05.
What would an app built on DeepSeek V4.1 Flash cost?
With 10,000 requests a month of 1,500 input and 400 output tokens, DeepSeek V4.1 Flash would cost about $9.30 a month at list price, without cache or batch discounts.
What is the API id of DeepSeek V4.1 Flash?
The id is deepseek/deepseek-v4.1-flash. It is the name passed in the model parameter of the API (or on OpenRouter).
Where do the prices come from and how often are they updated?
From the public catalogs of OpenRouter, models.dev and LiteLLM, which publish each provider's list prices. They sync once a day and the last update date is shown above the comparison.
What does price per million tokens mean?
It is what the provider charges per million tokens you send (input) or the model generates (output). A token is roughly 4 characters. Output almost always costs more than input.
Sources: OpenRouter, models.dev and LiteLLM. Prices in USD per million tokens, list price, no volume discounts. Prompt tokens are an estimate; each provider's tokenizer may differ.