ChatGPT 5.4 v/s Claude Opus 4.6: Which Model Should You use?

GPT-5.4 wins on cost efficiency, native computer use, and speed for high-throughput pipelines. Claude Opus 4.6 wins on knowledge-work depth, safety, long-context fidelity, and complex multi-step agentic resolution. The right call depends on volume vs. complexity. Two of the biggest model launches in 2026 have been ChatGPT 5.4 (released March 6, 2026) and Claude Opus 4.6 (released February 5, 2026). While OpenAI hunkered down and improved their GPT-5 series to near perfection, Anthropic