IBM ibm_boston vs IBM ibmq_casablanca

Side-by-side comparison over the metrics both devices report. Values come from different sources with different methodologies — mind the provenance badges; vendor-reported figures are manufacturer claims.

Metric IBM ibm_boston
IBM · Apache-2.0
IBM ibmq_casablanca
IBM · Apache-2.0
Best 2Q fidelity (higher better) 0.999345 0.992513
Median 2Q error (lower better) 0.00127713 0.0128596
Median readout error (lower better) 0.00512695 0.0174
Median T1 (µs) (higher better) 292.44 µs 88.063 µs
Median T2 (µs) (higher better) 352.97 µs 77.272 µs
Captured: 2026-04-17 (ibm_boston) · 2021-03-15 (ibmq_casablanca). Full histories: ibm_boston · ibmq_casablanca · leaderboard.