{
  "id": 598763,
  "title": "My fine-tuned model scored 100%... The benchmark was lying",
  "url": "https://urgent.news/2026/08/11/my-fine-tuned-model-scored-100-the-benchmark-was-lying",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-08-11T20:09:08.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/jguillaumesio/my-fine-tuned-model-scored-100-the-benchmark-was-lying-48fo"
  },
  "original_language": "en",
  "account": null,
  "summary": "I fine-tuned Mistral 7B on my laptop to detect personal data in log lines and support messages. On my first test set it scored 100%. Perfect. Every single line classified correctly. I did not publish that number, because the same test set gave few-shot prompting 94%, and a six-point gap over a prompt you can write in five minutes is not a reason to fine-tune anything. The honest conclusion looked…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}