State of the art on ChatPPG

#1 on WESAD Heart rate

4.28MAE (BPM) (lower is better)

Method: BeliefPPG
Reported in: GPT-PPG: a GPT-based foundation model for photoplethysmography signals · Table 2
Compared: 4 results under the same protocol; runner-up GPT-PPG 1B 4.98
Protocol: leave-one-session-out · within-dataset · fine-tuned · no quality filtering

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Results as reported by the authors; not independently reproduced. Awarded 2026-10-20; re-checked on every atlas sync.