deepseek-v4.1-flash
DeepSeek/Open weights/2 providers
DeepSeek V4.1 Flash is a 552B parameter Mixture of Experts model built on a new Causal Encoder Decoder architecture that activates only 8B parameters for input and 16B for output, giving frontier level intelligence at a fraction of the cost. It is the smallest model in the new DeepSeek architecture family and the first Flash with native vision and multimodal understanding. V4.1 Flash beats DeepSeek V4 Pro on performance, cost, speed and task completion time and scores 88.1 on CyberGym. Its KV cache is compressed to 890 bytes per token, four times smaller than V4 Flash and over 400 times smaller than V1, cutting the cache hit costs that dominate agent workloads. 1M token context window, 384K max output, thinking and non thinking modes, tool calling, JSON output and prompt caching. Pricing per 1M tokens starts at $0.003 for cache hits, $0.15 input and $0.60 output off peak, with peak rates at double (01:00 to 04:00 and 06:00 to 10:00 UTC, Monday to Friday). Open weights are published on Hugging Face. Ideal for coding agents, long context RAG, high throughput batch processing and multimodal assistants. Replaces deepseek-v4-flash and deepseek-v4-flash-vision-exp, both still accepted as aliases.MoreLess
Which id to call
deepseek-v4.1-flashRequesty routes this id across every provider serving deepseek-v4.1-flash, picking on price and health and failing over automatically. The id stays valid when a provider changes underneath it.
From /1M input
$0.30
DeepSeek
Context
1.0M
393K output
Endpoints
2
1 region
Regions
1
chat
Capabilities 5/8
2 endpoints / 1 region
Providers serving deepseek-v4.1-flash
Provider prices, per 1M tokens. Pay as you go adds 5%, or 0% on your own keys.
A column is blank where no qualifying sample exists, and every row links to that provider's endpoint page.
model=
Which id to call
One base url, https://router.requesty.ai/v1, and one key for every id here.
deepseek-v4.1-flashRequesty routes this id across every provider serving deepseek-v4.1-flash, picking on price and health and failing over automatically. The id stays valid when a provider changes underneath it.
OpenAI compatible
Call it in three lines
Change the base url, use your Requesty key, set the model to any id on the left. Existing OpenAI SDK code needs no other edit.
123456789101112131415from openai import OpenAI client = OpenAI( api_key="YOUR_REQUESTY_API_KEY", base_url="https://router.requesty.ai/v1", ) response = client.chat.completions.create( model="deepseek-v4.1-flash", messages=[ {"role": "user", "content": "Explain quantum computing in one paragraph."}, ], ) print(response.choices[0].message.content)
6
More from DeepSeek
deepseek-v4-flash-vision-exp
1.0M ctx/from $0.22/1 provider
deepseek-v4-pro-0813
1.0M ctx/from $1.30/4 providers
deepseek-v4-flash-0731
1.0M ctx/from $0.07/8 providers
deepseek-v4-pro-0424
1.0M ctx/from $1.04/4 providers
deepseek-v4-flash-0424
1.0M ctx/from $0.07/4 providers
deepseek-v3.2
164K ctx/from $0.27/2 providers
Reference
deepseek-v4.1-flash questions
Which providers serve deepseek-v4.1-flash?
deepseek-v4.1-flash is available from 2 providers through Requesty: DeepSeek, Novita AI. All endpoints share one OpenAI-compatible API and one key, and Requesty fails over between them automatically.
How much does deepseek-v4.1-flash cost?
Pricing starts at $0.30 per million input tokens and $1.20 per million output tokens on DeepSeek, the cheapest endpoint. Prices vary by provider and region; the table above shows every endpoint. Those are the upstream provider rates: pay as you go adds 5% on top, or 0% if you bring your own provider keys.
Is deepseek-v4.1-flash open weights?
Yes. deepseek-v4.1-flash is an open-weights model from DeepSeek, which is why multiple inference providers can host it. Provider choice affects price, latency, and data-privacy terms, all compared above.
What is the context window of deepseek-v4.1-flash?
deepseek-v4.1-flash supports up to 1.0M tokens of context, with up to 393K output tokens per response. Some providers expose a smaller window; check the per-endpoint context column above.
How do I use deepseek-v4.1-flash with the OpenAI SDK?
Install the OpenAI SDK, set base_url to "https://router.requesty.ai/v1", set your API key to your Requesty key, and set the model to "deepseek-v4.1-flash" or any endpoint id from the table above. The quickstart section shows Python, JavaScript and cURL snippets.
Should I call deepseek-v4.1-flash by its managed id or a provider id?
Use the managed id, "deepseek-v4.1-flash". Requesty picks which of the 2 providers serves each request based on price and health, and fails over when one degrades, so the id keeps working while the routing changes underneath it. Send a provider id like "deepseek/deepseek-v4.1-flash" only when you need one specific deployment and want no failover.
Route deepseek-v4.1-flash through one endpoint
One key for 2 providers on this model and 600+ others. No markup on provider prices, automatic failover, caching built in.