alt Hacker NewsNot really. Anthropic for example sells both the harness and the models as a unified kit via Claude Code, it is in their best interest to make sure both parts work as well as possible, via reinforcement learning of previous usage as well for new model performance increases.
but harness are not a moat. They wouldnt have to subsidize their own harness massively if that was the case. Anyone can write a good harness .