DeepSeek-V4-Flash Update
DeepSeek has released the DeepSeek-V4-Flash API in public beta, alongside updates to its model lineup. The company is phasing out legacy model names in favor of new V4-Pro and V4-Flash versions.
Why it matters
Frequent updates to AI model APIs are critical for developers and enterprises integrating large language models into their software stacks.
Change Log On this page Change Log Date: 2026-07-31 DeepSeek-V4-Flash Update The official release of the DeepSeek-V4-Flash API is now in public beta. The API calling method remains unchanged — simply set the model name to deepseek-v4-flash to use the latest version.
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 DeepSeek API now supports V4-Pro and V4-Flash, available via both the OpenAI ChatCompletions interface and the Anthropic interface. To access the new models, the base_url remains unchanged, and the model parameter should be set to deepseek-v4-pro or deepseek-v4-flash .
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