B Grade B
Google Willow: Physical qubits
105 qubits
As stated in the source: “105 qubits”
Caveats
A count, not a performance measure. Google has also used a 72-qubit Willow processor (color code paper), so 'Willow' does not always mean 105 qubits.
- Set-up
- Square-grid layout, average connectivity 3.47 (4-way typical).
- Method
- Standard
- Compared only with
- results in the group “gate based”
- Measured
- Not stated
- Published
- 9 December 2024
- Measured by
- Google Quantum AI
- Independent of the maker
- No
- Peer-reviewed
- No
- Repeated by others
- Not yet
Source
Willow Spec Sheet, Google Quantum AI. Company technical document.
Comparable results
| Machine | Value | Set-up | Published | Measured by | Grade | Record |
|---|---|---|---|---|---|---|
| IBM Nighthawk r2 | 120 | gate based | 31 Aug 2026 | Maker | B | r-000015 |
| Quantinuum Helios | 98 | gate based | 17 Jun 2026 | Maker | B | r-000016 |
| Quantinuum H2 | 56 | gate based | 2025 | Maker | B | r-000022 |
| Atom Computing Ytterbium atom array | 256 | gate based | 18 Nov 2024 | Maker | B | r-000036 |
| IonQ Tempo | 100 | gate based | – | Maker | B | r-000026 |
History
- 27 October 2026: added
Spotted a mistake? Report an error, quoting r-000008.