DeepSeek-V4.1-Flash-1017

Users can use the model for tasks including coding, automation, and agent workflows at lower cost and higher speed, according to DeepSeek.

Availability

Official web and APP models updated; use deepseek-flash for API access

Pricing model

API pricing remains unchanged

Deployment

Not established

Privacy

Not established

Licence

Not established

• DeepSeek V4.1 Flash has been upgraded to DeepSeek-V4.1-Flash-1017. ^[1]

  DeepSeek V4.1 Flash has been upgraded to DeepSeek-V4.1-Flash-1017.

• The official web and APP models have also been updated to the new version. ^[1]

  The official web and APP models have also been updated to the new version.

• Use deepseek-flash to access the latest model through the API. ^[1]

  The API calling method and pricing remain unchanged — simply use deepseek-flash to access the latest model.

• The API calling method and pricing remain unchanged. ^[1]

  The API calling method and pricing remain unchanged — simply use deepseek-flash to access the latest model.

• DeepSeek says the model reduces task runtime and output length while improving performance. ^{[1] [2]}

  While improving performance, we also reduced the model's task runtime and output length, enabling users to complete tasks at lower cost and higher speed and achieving a new performance–cost Pareto optimum across multiple harnesses.

• DeepSeek recommends upgrading to DeepSeek Harness 0.2.1-rc.1 or later for the best experience with the new model. ^[1]

  Please upgrade to DeepSeek Harness 0.2.1-rc.1 or later for the best experience with the new model.

• DeepSeek opens a real-time web search API Weekly brief 2026-W42
• DeepSeek adds web search for apps and updates its Flash model Daily brief 2026-10-17