GPT — Field Evidence

“Thoughts[^0] from Theo, who had early access: > It's a damn good model. Not quite as "smart" as Fable, but it is incredibly capable. Fixed all the problems I had with GPT-5.5. > It is incredibly determined. Will run for a day without even using a /goal. It understands…”

“I feel like listening to Theo about anything technical is like consulting a Labrador retriever for advice on quantum physics. Every time I've ever seen one of his videos it's pretty clear he has very little understanding of development or engineering. I first became aware of…”

“I’m bouncing back between Codex and Claude like a ping-pong ball. I much prefer the experience using Codex, less verbose and to-the-point I’ve found. But Fable, being as strong as it is, is a big draw for Claude right now. I’ll likely switch back to Codex if 5.6 Sol is…”

“> Not quite as "smart" as Fable, but it is incredibly capable. THIS IS BECAUSE GPT-5.6 SOL IS... just a more posttrained version of GPT-5.5, not a brand new bigger model than GPT-5.5. It's not like how Mythos is bigger than Opus. OpenAI switching to Sol/Terra/Luna renaming is…”

“Any previewers have hot takes? I've really preferred gpt-5.5 over Opus 4.8 for data analysis and scientific software work. It seems much more reliable. Fable is unusable for the type of work that I do (due to guardrails). Really looking forward to trying these new OpenAI…”

“Interesting to hear people like gpt-5.5. For me it feels smart only at one shot prompts, but if you try to build up session context before doing something it feels magnitudes inferior to Claude. I'm almost sure its because the thinking of previous turns is stripped with the…”

“It seems comparable to Fable to me in my uses.”

“That's great to hear - and for the same price as 5.5, and reportedly with much lower token use per task. Were you able to try Sol Ultra?”