MF0 (mf0.ai) is a web platform that bundles access to multiple AI language models (including ChatGPT, Claude, Gemini, Grok, Perplexity) through a unified interface. The core feature is the "Memory Tree" (Memory Graph), a personal knowledge graph that automatically links facts, people, events, and ideas from conversations and makes them available to all connected models as context via the "Digital Brain" mechanism. The platform additionally offers conversation management (Themes/Dialogs), usage analytics, file handling, and multi-model modes such as "Fusion" (parallel evaluation of multiple models) and "Ultra" (task decomposition). Billing is usage-based with no subscription requirement.

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