DeepSeek V4 Pro Scores 38.0 vs GPT‑5.5 Pro 33.0

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- DeepSeek V4 Pro scores 38.0 in the precision matchup.
- GPT‑5.5 Pro scores 33.0 in the same matchup.
- DeepSeek V4 Pro handles overlapping patterns with a single regex, correct priority, and no dropped matches in the python log redactor task.
- GPT‑5.5 Pro splits the work across separate regexes, unlike DeepSeek’s single‑regex approach.
- DeepSeek V4 Pro was tighter, more literal, and more reliable under constraints, while GPT‑5.5 Pro was more improvisational.
Why it matters: DeepSeek’s higher precision gives it an edge for developers needing exact regex cleaning, potentially shifting workloads away from GPT‑5.5 Pro, which may need to improve its pattern‑handling to stay competitive.




