IBM ibm_boston vs IBM ibmq_kolkata

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_kolkata
IBM · Apache-2.0
Best 2Q fidelity (higher better) 0.999345 0.994992
Median 2Q error (lower better) 0.00127713 0.00754247
Median readout error (lower better) 0.00512695 0.0096
Median T1 (µs) (higher better) 292.44 µs 111.48 µs
Median T2 (µs) (higher better) 352.97 µs 82.676 µs
Captured: 2026-04-17 (ibm_boston) · 2021-12-09 (ibmq_kolkata). Full histories: ibm_boston · ibmq_kolkata · leaderboard.