Reproductions — Frontier CheckpointA living, friendly logbook of reproduction efforts. We run the paper, attach the harness, seeds, and hardware, and report clearly what we found — so you can see exactly how a result holds together, build on solid ground, and reuse the work yourself.https://frontiercheckpoint.com/Reproducing the nanoGPT Speedrun: What Actually Moves the Loss Curvehttps://frontiercheckpoint.com/reproductions/reproducing-nanogpt-speedrun/https://frontiercheckpoint.com/reproductions/reproducing-nanogpt-speedrun/[In the lab] On a small config the direction reproduces — with the architecture fixed, Muon reaches the 3.28 FineWeb target in markedly fewer optimizer steps than AdamW — but the headline wall-clock record is hardware-locked to 8×H100, and our reference-node run is still pending.Mon, 15 Jun 2026 00:00:00 GMTReproductionsreproducibilitypretrainingoptimizationdistributed-trainingeditors@frontiercheckpoint.com