AI models are vanishing without a trace and nobody is talking about it (24-month study on DeepSeek, Claude, Gemini and GPT)

I've spent two years (June 2024 – June 2026) tracking a disturbing pattern: generative AI models are disappearing, getting suspended, or being "updated" to newer versions without us really knowing what actually changed. And the scariest part? It's no longer an isolated incident; it's becoming a silent norm. I document how this systematic disappearance is being managed through two mechanisms that completely fly under the public radar: Commercial deprecation (I analyzed 6 cases): 100% of the official communic