Theo Browne combines benchmark comparisons, early-user reports and his own GPT-5.6 experience. He highlights more persistent task completion, improved context handling and useful computer interaction, while separating published benchmark results from his practical observations. Claims about availability, pricing and competing models describe the release period covered by this video, not current product guidance.
Theo Browne's central caution is that determination is not the same as judgment. He reports overlarge code changes, unnecessary tests, weak unprompted design choices, resistance to corrections and repeated attempts that can consume substantial usage. Clear outcomes, steering and stopping conditions remain important even when an agent can work longer.
Theo Browne discusses Sol, Terra and Luna as different capability and cost choices, and notes that higher reasoning settings do not always justify their additional expense. His Terra experience is limited and Ultra is not fully reviewed here. The takeaway is to evaluate a bounded real task and its total cost rather than choose from a single benchmark rank. The PostHog advertisement and subscription calls are omitted.
Watch on YouTube
