Model-Harness-Task fit is very real. The world's best agents carefully tailor the harness around the model to take advantage of each model's…

Model-Harness-Task fit is very real. The world's best agents carefully tailor the harness around the model to take advantage of each model's unique intelligence & capabilities 🧠 Today we released Harness Profiles in deepagents so that every team can more easily version, manage, and create the best optimized Harness for their agents/tasks. Previously, we intended deepagents to have a good set of harness primitives across model families (which it does), but we saw the need to help build a primitive to override and extend the defaults per model on top of our base harness We again find that adjusting the base Deep Agents harness using model prompting guides and evals leads to large performance gains 🚀 Try out deepagents today to use our built-in profiles, we're actively working to manage and extend them to more models Excited to help teams build the best harness in the world for their models and tasks!

Source: Harrison Chase (X) | 2026-04-29