High-fidelity web archive, structured clean texts, frontier AI safety whitepapers, architecture milestones (GPT-1 through GPT-4o, ChatGPT, Sora, DALL-E), and complete media assets from OpenAI's official news estate. The OpenAI Official News, Research & Landmark Publication Archive is a curated, high-fidelity archive capturing the entirety of OpenAI's official publication estate (openai.com/news/). Maintained and published by Sphita AI Research, this dataset is engineered for frontier LLM pretraining, domain-specific instruction tuning, alignment research, and technical retrieval-augmented generation (RAG). Spanning 11+ years of transformative AI history (2015-12-11 to 2026-10-15), this…