I can't name one but I can tell you these models keep getting stupider as they keep existing and their system prompts get inflated with what not to do. I have experienced this happen with Qwen 3.8 Max Preview where for the early days it was blasting through Rust code fine and then before the release it silently got replaced and started to suck hard. Claude still has the "blue button" problem so it is probable that a casual chat with it could have this exact outcome of forgetting what to do. I saw some models also have this thing where when you tell them a text restriction they first ignore it in thinking, creating the full text and then apply them in their thinking rewriting it fully causing your output tokens to be inflated.