Harness
Harness on Beyond Market Intelligence: a running collection of 2 stories we have gathered and hand-picked because they are worth your time. Every post here touches on harness in some way — the news, the analysis, the deep dives, and the occasional surprise find. Acme AI is the next-generation, AI-powered spreadsheet platform built to replace Excel and redefine how analysts, data scientists, and enterprise teams work with data. New stories are added to this page as we find them, so check back if you want to keep up with what is happening around harness, or subscribe to the RSS feed to get them as soon as they are published. Browse the collection below, or head back to the homepage to see everything Beyond Market Intelligence is covering right now.
New Fable5/Opus4.8 harness called "Schema" claims 99% on ARC-3 [R]
Introducing Schema, a new Fable5/Opus4.8 harness achieving impressive results on the ARC-AGI-3 benchmark. Schema attains 99% accuracy with Claude Opus 4.8 and 95.35% with GPT-5.6 Sol—all without modifying model weights. This innovative harness refines the interaction process, optimizing how observations inform models, predictions are tested, and plans are executed. A fixed fallback rule prioritizes Opus 4.8 and Sol, ensuring robust performance across all games, as noted by ARC Prize. Explore the technical details and methodology at [https://schema-harness.github.io/](https
QCon AI Boston: Production AI Moves Beyond Prompts to Platforms, Harnesses, and Evals
QCon AI Boston 2026 addressed a critical shift: Production AI moving beyond initial prompt-based exploration to robust platforms, harnessed agents, and rigorous evaluations. The conference centered on the operational challenges of deploying AI agents at scale, emphasizing improved context management and robust security measures—including a "harness" approach to contain agent access. Attendees explored a comprehensive engineering model for AI, recognizing the need for mature infrastructure. For further insight into agent security concerns, see our recent article, "The agent security gap."