… In terms of positive traits, our Alignment team concluded that Opus 4.8 “reaches new highs on our measures of prosocial traits like supporting user autonomy and acting in the user’s best interest.” The assessment also showed Opus 4.8 to have rates of misaligned behavior such as deception or coopera… …
… Footnotes For GPT-5.2 and Gemini 3 Pro, we compared against the best reported model version available via API in the charts and table. …
… Our alignment assessment concluded that the model is “largely well-aligned and trustworthy, though not fully ideal in its behavior”. Note that Mythos Preview remains the best-aligned model we’ve trained according to our evaluations. …
… For GPT-5.2 and Gemini 3 Pro models, we compared the best reported model version in the charts and table. …
… With Opus 4.5, we’ve made substantial progress in robustness against prompt injection attacks, which smuggle in deceptive instructions to fool the model into harmful behavior. …