Anthropic has officially launched Claude Opus 4.8, the latest version of its flagship AI mode. With this rollout the company promises that it may have fixed one of AI's biggest flaws. According to Anthropic, Claude Opus 4.8 is designed to be more honest, more thoughtful and significantly less likely to confidently pretend it knows something when it doesn’t.The company says Opus 4.8 is around four times less likely than its predecessor to allow flaws in code it writes to pass without warning the user. At a time when AI companies are racing to make models faster, more agentic and more autonomous, Anthropic appears to be focusing on the one thing that seems to be ignored: AI should know when it might be wrong and admit it.Claude Opus 4.8 is being positioned as a better collaboratorAnthropic says early testers described working with Opus 4.8 as feeling more like working with a real collaborator than previous models. According to the company, testers said the model asks better questions, catches its own mistakes and pushes back when plans don’t make sense instead of simply agreeing with users.One of the biggest criticisms surrounding chatbots is that many of them have become “yes-men,” often validating bad ideas, weak assumptions or outright incorrect information rather than challenging users. Anthropic appears to be leaning heavily into the opposite approach.The company also says Opus 4.8 showed major improvements in legal reasoning, coding, browser agents and long-form analysis tasks, with several early access partners claiming it outperformed previous Opus models and even GPT-5.5 in some agentic workflows.Users can now control how much the model thinks