Writing · Aug 1, 2026
Same harness, more engines: when one model stops being the default brain
I was an Opus fan. Then Opus 5 spent a session proving a solvable problem impossible, and Fable answered every question with a wall of tokens. So I stopped routing every hard job to Anthropic and started matching the model to the task. Grok shipped what Opus explained away; GLM does the cheap bulk. The skill I actually needed was routing.