DeepSeek V4.1 Flash
Chat model by DeepSeek.
DeepSeek language model featuring a 1,000,000-token context window. Engineered for dialogue, instruction following, and versatile text generation.
Context window
Maximum input context length.
1M
Max output
Maximum completion tokens per request.
393K
Maker
DeepSeek
Specifications
Context window, ranked against other chat models
Proportional scale: 0 to 1.05M tokens. Not ranked, no published context window: qwen-plus-2025-09-11, voxtral-small-24b-2507, qwen3.6-plus-2026-04-02.
1.0M
tokens393K
tokenschat
Benchmarks & performance rankings
Empirical intelligence benchmarks and category leaderboard placements for DeepSeek V4.1 Flash.
89.8%
93.2%
160ms
p99: 480ms
145tok/s
SWE-bench: 49.5%
Pricing
Rates are read live
Pricing for deepseek-v4.1-flash is fetched from the live catalogue on load, so it is never served from a cache that could outlive a repricing.
Availability
Not enough data yet
We have not collected enough health probes for this model to publish an uptime or latency figure. A percentage from a handful of samples is fabricated precision, so none is shown until the sample count supports one.
How DeepSeek V4.1 Flash is billed
Billed at the provider's list price, with no per-token markup.
- Exact list price
- Tokens settle at the published rate of the model that served your call.
- Cache discounts passed through
- Provider prompt-caching discounts reach your balance with no added fee.
- Cost on every response
- Each response carries the
x-nr-request-costheader, so you can reconcile spend per request.
More from DeepSeek
Start building with deepseek-v4.1-flash
One API key, three steps. Choose your tool to begin.
Get a key
Create API keySet your API key
export NROUTER_API_KEY="<YOUR_API_KEY>"Configure Claude Code
Choose a tool, then copy its setup from the panel.
FAQs
What is DeepSeek V4.1 Flash?
DeepSeek language model featuring a 1,000,000-token context window. Engineered for dialogue, instruction following, and versatile text generation.
How much does DeepSeek V4.1 Flash cost?
DeepSeek V4.1 Flash is billed at the provider's list price on nRouter with no per-token markup — tokens settle at the exact upstream rate. Input and output rates are read live, so see the pricing section above for the current figures.
What is the context length of DeepSeek V4.1 Flash?
DeepSeek V4.1 Flash supports a 1,000,000-token context window. It can generate up to 393,216 output tokens per request.
Does DeepSeek V4.1 Flash support tool calling and structured outputs?
Yes. DeepSeek V4.1 Flash supports tool calling (function calling), so it can invoke external tools and APIs during a conversation.
What inputs and outputs does DeepSeek V4.1 Flash support?
DeepSeek V4.1 Flash takes text as input and returns text as output.
How do I use DeepSeek V4.1 Flash via nRouter?
Use any OpenAI-compatible client: point it at https://api.nrouter.ai/v1 with your nRouter API key and set the model to "dashscope/deepseek-v4.1-flash". The quick-start panel above has a copy-paste curl command for this model.
When was DeepSeek V4.1 Flash released?
DeepSeek V4.1 Flash was released on October 6, 2026.
Where is the DeepSeek V4.1 Flash documentation?
Start at nrouter.ai/docs. The quick-start guide (nrouter.ai/docs/getting-started/quick-start) covers API keys and your first request, and the API reference (nrouter.ai/docs/api-reference) lists every parameter.
What other text models does DeepSeek have?
Other DeepSeek text models on nRouter include DeepSeek V4.1 Flash (nrouter.ai/models/deepseek-ai-deepseek-v4.1-flash), DeepSeek V4 Flash Vision Exp (nrouter.ai/models/deepseek-ai-deepseek-v4-flash-vision-exp), DeepSeek V4 Pro (nrouter.ai/models/deepseek-v4-pro), DeepSeek V4 Flash (nrouter.ai/models/deepseek-ai-deepseek-v4-flash).