AI Harnesses Are the Software Shells That Turn AI Models Into Capable Agents
Trending Topics Jakob Steinschaden ● Covered by 4 sources
AI harnesses are being positioned as the software layer that turns language models into multi-step agents by providing tools, rules, state/memory, and an execution loop. One harness-effect study found Claude Opus 4.5 scored 45.9% on SWE-bench Pro inside a standardized scaffold and 55.4% with Claude Code. The result is that agent performance and cost increasingly depend on the harness (and its setup and security), creating a new competitive layer and locking in workflows and permissions beyond the base model.
Why it matters
When people talk about artificial intelligence, they usually mean the models. Names like Claude, GPT and Gemini stand in for the capabilities of entire AI systems. For agents, that view falls short. A language model can produce text or propose a tool call. To edit files on its own, run research, execute programs and pursue […] Der Beitrag AI Harnesses Are the Software Shells That Turn AI Models Into Capable Agents erschien zuerst auf Trending Topics.