OpenRouter for OpenAI-compatible apps is best understood as a low-friction portability layer that lets many applications keep familiar OpenAI-style request patterns while gaining access to many models and providers through one API surface. This matters because developers often do not want to rebuild an application just to test another model provider. A chat app, coding assistant, support agent, internal workflow tool, or structured-output system may already be built around Op

Claude Opus 4.7 for difficult prompts is best understood as a more literal and precision-oriented reasoning model that performs best when instructions are explicit, completion criteria are clear, and the task requires careful handling of constraints across several steps. Its value is strongest in workflows where the model must preserve rules, follow detailed instructions, reason through complex trade-offs, verify its own output, and complete work without drifting away from th

ChatGPT 5.5 for scientific work is best understood as a research reasoning and data-analysis assistant that can help scientists organize evidence, test assumptions, work with code and documents, synthesize literature, and support complex problem solving across multiple steps. Its value does not come from replacing researchers or turning scientific discovery into a single prompt. Its value comes from helping with the difficult middle layer of research work, where ideas must be