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Vladimir Mynkaleft a comment
I really like this model’s style. After a year and a half of ornate markdown and over-structuring, it is refreshing to interact with something that feels more alive. It immediately feels like a model designed to work, not just to talk. And when used carefully, it can do genuinely unreal things. I once uploaded a ZIP archive of MRI scans and got back a summary that felt surprisingly close to the...

GPT‑5.4OpenAI's most efficient model: less tokens, more clarity
