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Epoch AI's Furniture Assembly Benchmark shows models photos taken mid-IKEA-build and asks them to catch assembly mistakes against the official manual. The top score jumped from 28%, set by Claude Opus 4.5 in November 2025, to 80%, set by OpenAI's GPT-6 Astra in September 2026
Verified 2026-09-29
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More on Models
- AI models can now win gold at the International Mathematical Olympiad, yet Stanford's 2026 AI Index found they still fumble a task most children master early. Across ClockBench's 180 clock designs and 720 questions, the top model, GPT-5.4 High, read analog clocks correctly only 50.6% of the time, versus 90.1% for humans
- Frontier AI models are catching up fast to benchmarks meant to resist them. A year ago they scored under 10% on Humanity's Last Exam, a 2,700-question test designed to be hard for AI and favorable to human experts. Now accuracy has reached 38.3% on Humanity's Last Exam, up from under 10% a year earlier
- Stanford's 2026 AI Index cites a study that pitted Microsoft's AI Diagnostic Orchestrator, paired with OpenAI's o3 reasoning model, against 21 practicing physicians with five to twenty years of experience working unaided on diagnostically challenging New England Journal of Medicine cases. The AI system's accuracy reached 85.5%, versus about 20% for the unaided physicians