Claude Opus 4.1

Advanced Reasoning and Intelligence.
Claude 3 Opus is great at solving tough problems. Think math proofs, planning, or even tough ethical talks. It beats other models in tests for math and coding.

Multimodal Input Support.
You can upload images, PDFs, or code. It can describe what's in pictures. Also, it pulls data from charts or checks documents, which helps with research and making content.

Long-Context Handling.
It keeps up with talks up to 200,000 tokens. That's about 150,000 words. It remembers what you said over long chats. This is good for writing books or studying data.

Constitutional AI Safety.
It has safety built-in. This makes sure answers are useful, honest, and safe. This cuts down on wrong info or bias. It fixes itself and tells you why it does things.

Customization and Tools Integration.
Developers can use APIs to make apps. Plus, there are tools like "Artifacts." These show previews of what it makes, like React code. Also project management helps organize chats.

Collaboration and Sharing.
You can share chat links. Work together in real-time with Team plans. You can also send out what you make. This makes it easy for teams to work together for creative or data jobs.