AI user reports mixing Opus 5, GPT-5.6 Sol and open models for daily work

One AI user says their day-to-day work still relies on Opus 5, GPT-5.6 Sol and open models such as DS4, all made possible by a custom setup they call a “harness.” They say they rarely need Fable 5.1 or GPT-6 Astra, sometimes using them for long-running tasks or flashy demos.