DeepSeek · model page
What DeepSeek V4.1 Flash is
On 10 September 2026, DeepSeek introduced DeepSeek-V4.1-Flash as the smallest model in a new architecture family, with native visual understanding. DeepSeek describes a Causal Encoder–Decoder design aimed at greater capability and faster inference, and says the model is live on the DeepSeek API as deepseek-flash.
OpenRouter lists deepseek/deepseek-v4.1-flash and documents an OpenAI-compatible chat completions API. This page does not invent a bnrouter gateway model id or a price.
Official announcement: Read DeepSeek’s V4.1 Flash post (10 September 2026)
Where developers can use it
DeepSeek lists these official surfaces first. bnrouter is an optional OpenAI-compatible gateway in front of connected upstream accounts.
- DeepSeek API (vendor id deepseek-flash), as named in the 10 September 2026 post
- OpenRouter listing deepseek/deepseek-v4.1-flash
- bnrouter, if the operator has connected an upstream that serves this model. The plaza may still show coming soon — confirm the id in the console or GET /v1/models.
How to call it through bnrouter
bnrouter accepts the OpenAI chat completions protocol. Create an API key in the console, then send requests to the gateway base URL. This repository does not yet record a gateway model id — copy the id shown in the console (or from GET /v1/models) into the model field. The plaza listing may still show coming soon.
curl https://bnrouter.com/v1/chat/completions \
-H "Authorization: Bearer $YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "YOUR_MODEL_ID",
"messages": [{"role": "user", "content": "Hello!"}]
}'from openai import OpenAI
client = OpenAI(
api_key="YOUR_API_KEY",
base_url="https://bnrouter.com/v1",
)
resp = client.chat.completions.create(
model="YOUR_MODEL_ID",
messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)Replace YOUR_API_KEY and YOUR_MODEL_ID with values from the console. Do not assume a model id that is not listed there.
Pricing
See current pay-as-you-go price after you register at https://console.bnrouter.com. This page does not list a gateway price.
Questions
What is DeepSeek V4.1 Flash?
DeepSeek’s 10 September 2026 announcement describes DeepSeek-V4.1-Flash as the smallest model in a new architecture family, with native visual understanding, intended for chat and coding-style workloads on an OpenAI-compatible chat completions API.
Is DeepSeek V4.1 Flash available on bnrouter?
DeepSeek said it was live on the DeepSeek API on 10 September 2026. OpenRouter lists deepseek/deepseek-v4.1-flash. On bnrouter, confirm the plaza or GET /v1/models — the listing may still show coming soon. See also the models index, quickstart, pricing, and API reference on this site.
How do I call DeepSeek V4.1 Flash through bnrouter?
Create a key in the console and POST to the OpenAI-compatible /v1/chat/completions endpoint on the gateway. Use the model id shown in the console — this repo does not yet list one. The plaza may still show coming soon.
What model id should I send?
Use the identifier listed for this model in the console or returned by GET /v1/models. A gateway model id is not configured in this repository. Do not treat the vendor id deepseek-flash or the OpenRouter slug as a bnrouter id.
How much does the DeepSeek V4.1 Flash API cost on bnrouter?
See current pay-as-you-go price after you register at https://console.bnrouter.com. This page does not list a gateway price.
Related pages
Try it in the console
Create an API key, confirm the model id in the model plaza, and send a first request.
Open console