[P] LLM with a 9-line seed + 5 rounds of contrastive feedback outperforms Optuna on 96% of benchmarks

Reddit r/MachineLearning / 3/30/2026

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Key Points

  • A proposed LLM optimization approach uses only a 9-line “seed” prompt plus 5 rounds of contrastive feedback to guide the search for better solutions.
  • The method is reported to outperform Optuna across 96% of benchmarks, suggesting a strong advantage over a popular black-box hyperparameter optimization baseline.
  • The linked write-up frames the technique as “contrastive feedback” (likely via iterative prompting/selection) rather than traditional optimizer-driven tuning.
  • The results emphasize benchmark-level performance gains, implying improved efficiency and effectiveness for experimentation workflows.
  • If validated broadly, this could shift practitioners’ preference from conventional tuning frameworks toward prompt-driven, feedback-based optimization loops.