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DeepSeek V4.1-Flash-1017 now serves deepseek-flash
Same model name and price on DeepSeek's API, new weights on Hugging Face.
DeepSeek released DeepSeek-V4.1-Flash-1017, an update to V4.1-Flash, on October 17, 2026. It is live on DeepSeek's website, app and API, and the weights are on Hugging Face and ModelScope.
What changed
deepseek-flashon DeepSeek's API is now served by DeepSeek-V4.1-Flash-1017. DeepSeek says the calling method and pricing are unchanged.- The legacy names
deepseek-v4-flashanddeepseek-v4-flash-vision-expstill work. Their models are retired, so those requests go to V4.1-Flash-1017 at the Flash price. - DeepSeek lists a 1M-token context and a 384K maximum output.
- The Hugging Face model card lists the MIT License for the weights.
- DeepSeek says the update finishes tasks faster with shorter outputs. Its change log lists DeepSWE v1.1 at 77.0 (up from 74.2) and Terminal-Bench 4.0 at 42.3 (up from 31.2).
DeepSeek API prices
Per million tokens for deepseek-flash, from DeepSeek's pricing page:
| Rate | Peak | Off-peak |
|---|---|---|
| Input, cache miss | $0.30 | $0.15 |
| Input, cache hit | $0.006 | $0.003 |
| Output | $1.20 | $0.60 |
Peak hours are 01:00 to 04:00 and 06:00 to 10:00 UTC, Monday to Friday, excluding Chinese public holidays. All other hours are off-peak.
Other hosts
- DigitalOcean added DeepSeek V4.1 Flash 1017 to Serverless Inference, Dedicated Inference and Managed Agents at $0.30 input, $1.20 output and $0.006 cached input per million tokens.
- Alibaba Cloud Model Studio added
deepseek-v4.1-flash-1017on October 17.
DeepSeek V4.1 Flash 1017 on RouterPlus
RouterPlus lists the model on 5 providers. Prices per million tokens, from the live catalog on October 31, 2026:
| Provider | Input | Output |
|---|---|---|
| Sail Research | $0.09 | $0.30 |
| Wafer | $0.13 | $0.50 |
| RunInfra | $0.15 | $0.60 |
| Doubleword | $0.15 | $0.60 |
| Particle AI | $0.2125 | $0.85 |
What to do
If you call the September V4.1 Flash on RouterPlus, moving to the update is a model ID change:
deepseek/deepseek-v4.1-flash -> deepseek/deepseek-v4.1-flash-1017Every provider and price: DeepSeek V4.1 Flash 1017 API pricing.