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When the official release of V4 Pro was launched in mid-August, DeepSeek also introduced its official companion client, DeepSeek Harness (short for DSH), but initially only supported the Web interface. Within a few days, it received over 100,000 GitHub Stars. Due to the official's delay in releasing a desktop client, the community developed several third-party versions.
Recent news shows that the official repository's main branch has added a complete desktop directory apps/desktop, which will support three platforms: macOS Apple Silicon, Intel, and Windows x64. It currently does not support Linux. After the official launch, installation packages are expected to be available on the download.deepseek.com page, but the downloadable version is not yet available.
Custom Protocol Is More Secure, Version Maintenance Is More Convenient
Compared to third-party community versions, the official desktop version of DeepSeek Harness, although functionally it also packages the Web interface into a desktop application, does not use local ports. Instead, it transmits data through a custom dsh-app:// protocol, which is more secure. In addition, the official desktop version packages the runtime and backend as a whole, making version maintenance more convenient. Third-party community clients often have separated front-end and back-end, which can lead to bugs, while the official version is obviously more stable.
There are also performance advantages. Although DeepSeek V4.1 Flash is also available in other clients, this model itself has been jointly optimized with its own DSH. Official test results show that the performance is best under DSH minimal mode. To pursue ultimate performance, the official client is unavoidable. After experiencing it, several netizens found that the cache hit rate of the DSH client is higher — although there is no detailed data to support it, the experience of using V4.1 Flash in DSH is indeed faster, and a hit rate of over 95% is common.
How to Choose the Chain of Thought Level? High and Low Are Enough for Daily Use
Recently, there has been a controversy: netizens discussed whether to enable the highest chain of thought level Max for V4.1 Flash. The thinking ability under Max intensity is undoubtedly the strongest, but it is aimed at long-term, high-difficulty tasks, with high time and Token consumption. For normal use, the High mode is sufficient, and even in the High thinking intensity, the performance for ordinary tasks is better.
If it's simple conversations and tasks, the Low mode is enough, and you can even disable it directly, making the response speed smoother. Considering that most users use V4.1 Flash to handle non-complex tasks, there is indeed no need to set the thinking intensity to the maximum. High and Low modes are sufficient for daily use and can save time and costs.