Testing Shows Changing GPU Hardware in Benchmarks Affects Result Reproducibility

On November 7, 2026, a DEV Community article examined how swapping GPU hardware affects the reproducibility of benchmark scoring results. The author moved the Open Discovery Challenge (ODC) molecular scoring task onto Hugging Face jobs, with the goal of choosing the cheapest GPU that would still produce the same results. The same set of molecules was re-scored on three cards, with the leaderboard write locked to prevent any drift in the recorded ranking.

Two cards, the L40S and the A100, reproduced the registered scores down to the third decimal place. The cheapest card, the L4, produced no errors at all — yet it scored lower: 87,329 instead of 88,106 in season 2, and 80,504 instead of 81,427 in season 4. The takeaway is that when evaluation hardware changes, confirming that a job runs without failing is not enough; results must be checked for reproducibility against a reference machine as well.

This overview relies on a single article, and no follow-up reporting from other outlets has appeared since its publication.