DeepSeek V4.1 Flash 1017 is the October 17, 2026 snapshot of DeepSeek V4.1 Flash, served by DeepSeek under the `deepseek-flash` API model name.
Cost rate
0.1x
Context
1M
Released
Oct 17, 2026
Input
TextImage
Output
Text
Support
ReasoningTool callingStructured outputs
Best at
The categories where this model ranks highest.
Medicine & Healthcare
#10 · top 3%
Software & IT Services
#27 · top 6%
Business, Management, & Finance
#30 · top 7%
Mathematical
#30 · top 7%