Every major OpenCog Classic component has a Hyperon successor.
| OpenCog Classic | Tech | Hyperon Successor | Tech | What Changed |
|---|---|---|---|---|
| AtomSpace | C++, Guile, Python | Space API | Rust, Python, multiple backends | Generalized behind a universal Space API. |
| Atomese | Scheme S-expressions | MeTTa | Purpose-built language | Homoiconic language with formal types. |
| URE | C++, Scheme | MeTTa chaining | Pure MeTTa | C++ term-rewriting to MeTTa graph rewrites. |
| PLN | C++, Scheme, URE | PLN (MeTTa) | Pure MeTTa, PeTTa | Adds quantale factor graphs, geodesic control. |
| MOSES | C++, Boost, combo | metta-moses | Pure MeTTa | Full reimplementation with GEO-EVO. |
| ECAN | C++, CogServer agents | metta-attention | MeTTa, PeTTa | Adds optimal transport theory. |
| OpenPsi | Scheme, rule-based | MetaMo | MeTTa + Python | Category-theoretic pseudo-bimonad. |
| Link Grammar + RelEx | C + Java | Semantic Parsing | Various | LG maintained. RelEx deprecated. |
| GHOST | Scheme, ChatScript | PRIMUS robotics layer | MeTTa + game/robot | Minecraft, social robotics, game AI. |
| CogServer | C++, telnet/HTTP | DAS + MeTTaCycle | C++, Rust, blockchain | Distributed queries + ASI Chain. |
| cogutil | C++, v2.2.1 | (no direct equivalent) | N/A | Hyperon Rust codebase provides own infra. |