OpenAI is retiring GPT-4o from ChatGPT on February 13. Lazarus keeps it alive. Same model you loved. No API keys needed. But we didn't just bring it back — we built what ChatGPT should have been: unlimited memory that persists across every conversation, AES-256 encryption, and full ChatGPT history import. Free tier available, no credit card required. If you felt the difference when 4o was gone, we built this for you.