GPT 5.6 Sol is the first model I've used where I can trust it to add 100-500 lines of code maintainably. It's great with Codex. I still find that LLMs tend to

GPT 5.6 Sol is the first model I've used where I can trust it to add 100-500 lines of code maintainably. It's great with Codex. I still find that LLMs tend to not know how to compose larger ideas but on the scale of small ideas or short form well defined tasks like small scale debugging/performance engineering it's safe to say that they are now superhuman.