Anthropic: Claude Opus 5

Claude Opus 5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token context window. It is particularly strong at end-to-end software tasks - implementing features, code review and bug finding, multi-stage debugging - as well as visual analysis of documents and diagrams, and coordinating multiple agents on complex deliverables. It maintains strong instruction-following and tool use across extended interactions, and remains efficient for latency-sensitive workloads.