{"slug": "an-ai-model-programmed-nonstop-for-19-days-on-a-single-mirrorcode-task-that-cost", "title": "An AI model programmed nonstop for 19 days on a single MirrorCode task that cost $2,600 to run", "summary": "Epoch AI's new MirrorCode benchmark tests AI models on recreating complete programs without access to original code. Claude Opus 4.7 leads with a 56 percent solve rate, rebuilding a 16,000-line toolkit in 14 hours, but all models fail on the most complex tasks. One model ran nonstop for 19 days on a single task, costing $2,600.", "body_md": "Epoch AI's new MirrorCode benchmark tests whether AI models can recreate complete programs without access to the original code. Claude Opus 4.7 leads with a 56 percent solve rate, rebuilding a 16,000-line toolkit in just 14 hours. But every model tested still fails on the most complex tasks.\n\nThe article [An AI model programmed nonstop for 19 days on a single MirrorCode task that cost $2,600 to run](https://the-decoder.com/an-ai-model-programmed-nonstop-for-19-days-on-a-single-mirrorcode-task-that-cost-2600-to-run/) appeared first on [The Decoder](https://the-decoder.com).", "url": "https://wpnews.pro/news/an-ai-model-programmed-nonstop-for-19-days-on-a-single-mirrorcode-task-that-cost", "canonical_source": "https://the-decoder.com/an-ai-model-programmed-nonstop-for-19-days-on-a-single-mirrorcode-task-that-cost-2600-to-run/", "published_at": "2026-06-26 17:24:27+00:00", "updated_at": "2026-06-26 17:37:11.242305+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "ai-research", "ai-products", "developer-tools"], "entities": ["Epoch AI", "MirrorCode", "Claude Opus 4.7", "The Decoder"], "alternates": {"html": "https://wpnews.pro/news/an-ai-model-programmed-nonstop-for-19-days-on-a-single-mirrorcode-task-that-cost", "markdown": "https://wpnews.pro/news/an-ai-model-programmed-nonstop-for-19-days-on-a-single-mirrorcode-task-that-cost.md", "text": "https://wpnews.pro/news/an-ai-model-programmed-nonstop-for-19-days-on-a-single-mirrorcode-task-that-cost.txt", "jsonld": "https://wpnews.pro/news/an-ai-model-programmed-nonstop-for-19-days-on-a-single-mirrorcode-task-that-cost.jsonld"}}