i use /fast mode with thinking:none / low on chatgpt5.5 and it's awesome.
i call it goblin mode
i wouldn't even think about slow, but gear up to xhigh for big builds.
claude code /fast feels like luxury, or it did. now there's tension between 4.6 /fast and 4.7, and 4.7 is ... great but overconfident. so instead of working on what i want to work on, i am trying ro figure out and work around the model!
i think people who use claude code fast should give goblin mode a try
Jared Friedman@snowmakerSoftware engineering job descriptions should really start saying whether they include /fast mode or not.