Someone Fine-Tuned OpenBMB’s MiniCPM5-1B on Claude Fable 5 Traces to Ship a 657MB Local Thinking Model

A community developer, GnLOLot, has published a 1B parameter model, MiniCPM5-1B-Claude-Opus-Fable5-Thinking, built on OpenBMB's MiniCPM5-1B architecture and fine-tuned on Fable 5 data to improve coding and instruction following. The model runs locally without cloud calls or API key, with a smallest footprint of approximately 657MB, and can be loaded in various llama.cpp-compatible runtimes.