DeepSeek V4.1 Flash reads your prompt with half the model. I ran its prompt code and found one small tool adds 266 tokens to every request.

On 10 September 2026 DeepSeek, an AI company based in China, released DeepSeek V4.1 Flash. You can call it on DeepSeek's API (the web service where DeepSeek runs the model for you) or download the wei