Claude Opus 4.8 expands what can fit inside a single AI working session. Long files, dense PDFs, large repositories, research folders, legal bundles, policy archives, technical documentation, and multi-document projects all become easier to work with when the model can reason across a larger amount of material. The context window is the space where instructions, files, messages, code excerpts, tool results, images, PDF pages, and conversation history are held while the model

ChatGPT 5.5 is most useful for research when the task requires more than a direct answer. Research work usually involves current information, competing sources, uploaded files, internal documents, data tables, and claims that need to be checked before they are used. A strong research workflow does not only collect information. It verifies sources, separates evidence from interpretation, identifies uncertainty, and turns scattered material into a structured conclusion. This is

Grok is available through several access paths, but the most common comparison is between Grok Free and SuperGrok. Both give users access to the Grok consumer experience, but they are designed for different levels of use. Grok Free is the entry point for users who want to try the assistant, ask occasional questions, and test core features without a paid subscription. SuperGrok is the main paid consumer plan for users who need higher limits, broader model availability, priorit