Opus 4.5 is a chat model trained by Anthropic, with a knowledge cutoff of March 2025, and a context window of 200,000 tokens. You can configure the model's reasoning level.

Anthropic's most powerful model. It’s intelligent, efficient, and the best model in the world for coding, agents, and computer use.

On Zo, you can choose between all the leading AI models for chatting, research, coding, and generating media. We believe in giving you the power to explore different models so that you can get the best results for any task.