The model is rented and it changes under you. The harness — prompts, tools, memory, checks — is the part that's yours, and it's where the real leverage hides.
Disclosure up front: I build agentproto, one of the
tools in this market. Every fact below is dated and sourced; the tool-by-tool
review lives in
9 coding-agent orchestrators, compared where
competitors' strengths are named. Corrections welcome — file an issue.
There's a formula I keep coming back to when people ask why their slick demo agent falls apart in...
Everyone's building agents. Half of them are running. The other half have "active plans." I've been...
Claude Code, Copilot, ChatGPT — none of these are 'the model.' They're harnesses wrapping a model. Once you internalize Agent =…
You don't actually care which model your agent runs on. You care that the thing you set up last month...
If you've spent any time wrestling with AI coding tools and agents in 2026, you've hit two...
Everyone benchmarks the model. Almost nobody benchmarks the harness — the loop, the tool dispatch,...
