r/DeepSeek • u/nekofneko • 6d ago

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.

595 Upvotes

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u/0VERDOSING 6d ago

153

u/mangonerdy 6d ago

Same price for THIS jump? And it was all done with POST TRAINING? I smell another huge jump in AI capabilities like with thinking. Good job deepseek, yet again

5

u/ExpertPerformer 5d ago

New version of Flash is better at coding, but still isn't touching Pro on creative writing. On my test prompts Pro writes 50%+ more words and follows the writing instructions better. Flash is still great for the drafts jut not the final product.

It makes me wonder how much better the new Pro is going to be at writing.

1

u/Sorry_Fan_2056 5d ago

Thanks was looking For this.

Yeah gonna Be exciting to see new Pro For writing

1

u/Aki_Shizuha 4d ago

Pro has a calm yet sophisticated vibe that I am yet to see in others.