Comparison
LLMs-from-scratch vs R2R
A neutral, constraint-first comparison - live GitHub stats and typed relationships, not marketing.
vs
| LLMs-from-scratch | R2R | |
|---|---|---|
| Tagline | Implement a ChatGPT-like LLM in PyTorch from scratch | SoTA production-ready AI retrieval system. |
| Stars | 99k | 7.9k |
| Forks | 15k | 644 |
| Open issues | 4 | 121 |
| Language | Jupyter Notebook | Python |
| License | Other | MIT |
| Last pushed | Jun 2, 2026 | Nov 7, 2025 |
| Categories | Model Training, LLM Frameworks | Data & Retrieval, LLM Frameworks |
Choose LLMs-from-scratch if…
- More widely adopted - 99k stars vs 7.9k.
- More recently updated (last pushed Jun 2, 2026).
- Leaner open-issue backlog (4).
- Also covers Model Training.