Unverified50% confidenceFactExact time
The new version of DeepSeek Harness is deeply integrated with the model training of V4 Pro and V4.1 Flash, and supports updating system prompts while retaining KVCache.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/11/2026
First Seen
Valid until: 12/10/2026
Sources
Related Entities
Related Claims
UnverifiedDeepSeek simultaneously updated DeepSeek Harness V0.1.5, with dedicated training and optimization targeting Harness's standard PTC minimal three modes.79% similarVerifiedIn its July changelog, DeepSeek credited its internal Harness (the "minimal mode") as the behind-the-scenes contributor to V4 Flash's programming benchmark scores.78% similarUnverifiedDeepSeek has deployed DSpark in production in V4 Flash and V4 Pro, and has open-sourced the training code and draft model checkpoints.76% similarUnverifiedDeepSeek V4后续版本会支持原生多模态，但多模态只是一个组件，主线仍是把AI训练做好并解决持续学习76% similarUnverifiedThe new version of DeepSeek Harness supports modifying system prompts while retaining existing KV cache, and adds features such as file upload, sidebar file preview, and bidirectional sub-agent communication.76% similar
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