DeepSeek-V4.1-Flash-1017 is a new post-training update to DeepSeek’s Flash model, served as deepseek-flash on the website, app and API. DeepSeek says it scores higher, finishes tasks faster and writes shorter outputs than the September version. It has a 1M-token context and is tuned for coding agents like DeepSeek Harness. It also adds a Search and Fetch API. Peak price is $0.30 in and $1.20 out per 1M tokens.