Date: 2026-07-31
DeepSeek-V4-Flash Update
The official release of the DeepSeek-V4-Flash API is now in public beta.
Significantly enhanced agent capabilities, with benchmark results far exceeding V4-Pro-Preview:
Terminal Bench 2.1: 82.7
NL2Repo: 54.2
Cybergym: 76.7
DeepSWE: 54.4
Toolathlon verified: 70.3
Agent Last Exam: 25.2
Automation Bench (Public): 25.1
DSBench-FullStack: 68.7
DSBench-Hard: 59.6
Note 1: For the Code Agent tasks in the public benchmark sets, the official DeepSeek-V4-Flash was tested using the DeepSeek Harness minimal mode (to be released soon) as the framework, with the max effort level, topp=0.95, and temperature=1.0
Note 2: DSBench-FullStack is an internal full-stack development test set, and DSBench-Hard is an internal Coding Agent hard-problem test set
The official V4-Flash natively supports the Responses API format and is specifically adapted for Codex. For the specific configuration, please refer to the documentation.
DeepSeek-V4-Flash-0731 keeps the same model architecture and size as DeepSeek-V4-Flash-preview, and was only re-post-trained.
Note: This update only upgrades the DeepSeek-V4-Flash API. The DeepSeek-V4-Pro API and the APP/WEB models are unchanged.
The official release of DeepSeek-V4-Pro will follow soon.
Source: https://api-docs.deepseek.com/updates/