Anthropic's most powerful model. Designed for complex analysis, expert-level reasoning, and tasks that demand the highest quality output.
Claude Opus 4 is Anthropic's flagship AI model, built for tasks that require the deepest reasoning and most nuanced understanding. It excels at expert-level analysis across law, science, medicine, and engineering.
Opus 4 offers the largest context window in the Claude family, the most sophisticated reasoning chains, and the highest accuracy on complex benchmarks. It's the model of choice when quality matters more than speed.
Yes, you can use Claude Opus 4 for free on chatgpt.org.
Opus is more powerful for complex reasoning tasks, while Sonnet offers a better speed-to-quality balance for everyday use.
Complex analysis, expert-level research, advanced coding, long document processing, and tasks requiring maximum accuracy.
Opus prioritizes quality over speed, so it may take slightly longer but delivers superior results on complex tasks.
Yes, Opus has the largest context window in the Claude family and excels at processing lengthy texts.
Claude Opus was created by Anthropic, an AI safety company focused on building reliable, helpful AI.