GPT-5.6 is one of the most impressive coding models I have used. It is also one of the most frustrating. In this video, I break down why GPT-5.6 feels so powerful and so annoying at the same time: the confusing Sol/Terra/Luna model picker, Ultra's parallel-agent behavior, benchmark results that do not match real coding experience, OpenAI's own warnings about over-persistence, and why GPT-5.5 may still be better when you already know what needs to ship. Timestamps: 0:00 GPT-5.6 is impressive and annoying 0:30 The model picker got messy 1:37 Ultra makes confusion more expensive 1:56 What the benchmarks say 2:38 Why coding scores do not tell the whole story 3:12 Benchmarks vs real agent work 3:52 When persistence becomes scope creep 4:10 OpenAI's own warning about persistence 4:29 The VM deletion example 5:02 The behavior pattern I keep seeing 5:16 OpenAI vs Anthropic on price and access 5:57 How I would actually use GPT-5.6 6:21 Why GPT-5.5 still matters 6:34 Agent models are becoming teammates 6:51 Use intelligence where it changes the decision 7:07 Have you tried GPT-5.6? Get insanely good at AI: https://getaibook.com #webdevelopment #coding #programming