For real work I'm already on Opus full time (plan+execute). I think there's a different space for cheap-but-good-enough options for small-to-med repo hobby projects. (Not enough usage to warrant a plan.) And Opus is only ~30 tok/s while grok-code-fast-1 is ~120. So planning with Opus and executing with grok-code-fast-1 is still on the table for me - it's good at following explicitly written plans, lightning fast.