ChatGPT 5.5 vs Claude Opus 4.7 — Full Comparison: Who Is the Strongest AI Model in 2026?
In 2026 the large-model competition has entered a new stage. ChatGPT 5.5 and Claude Opus 4.7 no longer compete just on “who chats better”; the battle now covers complex task execution, coding, long-context handling, multi-tool invocation, enterprise-grade security, and commercial deployment. ChatGPT 5.5 is more of an execution-oriented, engineering-style, agentified productivity model; Claude Opus 4.7 is more stable, cautious, excels at long contexts, and fits enterprise compliance and high-risk scenarios. This article systematically compares them across positioning, core abilities, coding, agents, RAG, enterprise knowledge bases, stock analysis, cost, and future trends.