DeepSeek tool J-Space debunked: 'Paper-level' data suspected fake
机器之心 · wechat · 2026-08-19
The project J-Space, which claimed to enable DeepSeek V4 Pro to outperform Fable5 with a single Skill, has been accused of data fabrication. While the author's report showed massive improvements across benchmarks, community reproduction tests indicated no difference in performance or worse results, with higher token consumption. The author was also reported to have deleted critical GitHub Issues. The article notes that J-Space exploited a real pain point of DeepSeek—sensitivity to runtime environments (e.g., score variance across different Harness modes)—to add credibility, emphasizing that improvements that cannot be reproduced are valueless.
Related event: J-Space Debunked: Alleged DeepSeek V4 Boost Was Faked(2 posts)→
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