| Sizes | 42 mm and 46 mm | — |
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| Case Materials | Aluminum (dark bronze, black, light gold, space gray), titanium (radiant gold, natural), ceramic (pearl white, night blue) | — |
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| Glass | Ceramic Shield 2 on aluminum models, said to be 60 percent tougher than the previous Ion-X glass | — |
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| Chip | S11 | — |
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| Health Sensors | New Health Sensing System with optical and electrical heart sensors; heart rate every five seconds | Optical heart sensor with hypertension notifications, sleep score, ECG, blood oxygen, sleep apnea notifications, wrist temperature |
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| Battery | Up to 24 h everyday; up to 10 h outdoor workout; 15 minutes of charging gives up to 12 h | Up to 24 hours; 15 minutes of fast charging adds up to 8 hours |
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| Software | watchOS 27 with Siri AI | — |
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| Price | From $399 in the U.S. | — |
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| Case Size | — | 42mm / 46mm, aluminium (jet black, rose gold, silver, space gray) or polished titanium (natural, gold, slate) |
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| Display | — | Ion-X glass on aluminium models (2x more scratch resistant), sapphire crystal on titanium models |
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| Connectivity | — | 5G cellular models with redesigned antenna |
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| OS | — | watchOS 26 (requires iPhone 11 or later with iOS 26) |
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