{"version":1,"type":"story","url":"https://digestai.news/story/taurus-harness-cuts-ct-annotation-costs-by-half-with-llm-review","json":"https://digestai.news/story/taurus-harness-cuts-ct-annotation-costs-by-half-with-llm-review.json","markdown":"https://digestai.news/story/taurus-harness-cuts-ct-annotation-costs-by-half-with-llm-review.md","slug":"taurus-harness-cuts-ct-annotation-costs-by-half-with-llm-review","headline":"Taurus harness cuts CT annotation costs by half with LLM review","summary":"Researchers at an unnamed lab tested whether an LLM could label CT scans more efficiently when guided by a structured harness (Taurus) versus free-form coding. They compared Taurus to a free-form agent using Claude Opus 5.5 across six public datasets (939 volumes total). The harness’s first version improved results on only two datasets by a negligible margin. However, refining the automated pass to mimic the agent’s strengths and adding LLM review for edge cases—like underestimating aneurysm size—closed the gap entirely. The final version matched free-form accuracy at **$1.22 per case**, half the **$2.71** cost of the standalone agent. The study suggests most gains came from automation, not the LLM itself, and could shift expert labor toward oversight rather than manual labeling.","keyPoints":["Taurus harness reduces CT annotation cost to **$1.22 per case**, half of Claude Opus 5.5’s **$2.71**","Final version matches free-form agent accuracy on six public datasets (939 volumes total)","Most efficiency gains stem from automation, not the LLM’s review step"],"whyItMatters":"If validated, this could slash costs for medical imaging annotation, a bottleneck for AI training. Hospitals and labs might adopt similar harnesses to cut labor without sacrificing precision.","category":{"slug":"research","name":"Research","url":"https://digestai.news/category/research"},"entities":{"companies":[],"models":["Claude Opus 5.5"],"people":[]},"firstPublishedAt":"2026-11-03T05:00:00Z","updatedAt":"2026-11-03T05:00:00Z","sourceCount":1,"hasPrimarySource":true,"sources":[{"outlet":"arXiv cs.AI","title":"Taurus: LLM-in-the-Loop CT Annotation Matches Coding Agents at Half the Cost","url":"https://arxiv.org/abs/2611.00247","publishedAt":"2026-11-03T05:00:00Z","type":"primary","primary":true,"lead":true}],"sourceNotes":null,"discussions":[],"thread":null,"cite":{"text":"Digest AI, \"Taurus harness cuts CT annotation costs by half with LLM review\", 3 November 2026, https://digestai.news/story/taurus-harness-cuts-ct-annotation-costs-by-half-with-llm-review","publisher":"Digest AI","title":"Taurus harness cuts CT annotation costs by half with LLM review","datePublished":"2026-11-03T05:00:00Z","url":"https://digestai.news/story/taurus-harness-cuts-ct-annotation-costs-by-half-with-llm-review"},"generatedBy":"Written by Digest AI's editorial model from the linked sources; the sources are the record.","license":"Headlines, digests and key points are written by Digest AI and may be quoted with a link to the story page. Linked articles belong to their publishers. Terms: https://digestai.news/terms#reuse"}