D-Wave Advantage2 vs Xanadu Borealis Specs, Pricing & Performance [2026]
Quick Verdict
D-Wave Advantage2 uses Annealing while Xanadu Borealis uses Photonic technology. D-Wave Advantage2 offers more physical qubits (4,400 qubits).
Specification Comparison
| Metric | D-Wave Advantage2 | Xanadu Borealis |
|---|---|---|
| Physical Qubits | 4,400 ✓ | 216 |
| Technology | Annealing | Photonic |
| 2Q Gate Fidelity | — | — |
| 1Q Gate Fidelity | — | — |
| Readout Fidelity | — | 98.00% ✓ |
| Quantum Volume | — | — |
| CLOPS | — | — |
| T1 (Relaxation) | — | — |
| T2 (Dephasing) | — | — |
| 1Q Gate Time | — | — |
| 2Q Gate Time | — | — |
| Connectivity | Zephyr (deg 20) | Linear (deg 2) |
| Max Circuit Depth | — | 10 ✓ |
| Max Shots | — | 100,000 ✓ |
| Dynamic Circuits | No | No |
| Error Mitigation | No | No |
| Cloud Platforms | 3 platforms | 2 platforms |
Green bold values with a checkmark indicate the better result for each metric.
Pricing Comparison
Example: 10-qubit, 50-depth circuit, 1,000 shots — estimated cost on cheapest platform: D-Wave Advantage2: $0.3000 vs Xanadu Borealis: $0.5000
Annealing D-Wave Advantage2
| Platform | Price | Status |
|---|---|---|
| D-Wave Leap | $2,000.00/min | Available |
| Best Amazon Braket | $0.3000/task | Available |
| qBraid | $0.3000/task | Available |
Photonic Xanadu Borealis
| Platform | Price | Status |
|---|---|---|
| Best Xanadu Cloud | $0.5000/task | Available |
| qBraid | $0.5000/task | Available |
Annealing vs Photonic: Technology Tradeoffs
- Advantage
- Very large qubit counts (5000+ physical qubits), fast sampling times (~microseconds per anneal), and a well-developed software ecosystem (D-Wave Ocean SDK) optimized for combinatorial optimization problems in logistics, finance, and scheduling.
- Challenge
- Limited connectivity between qubits requires problem embedding that can consume many physical qubits to represent a single logical variable. Not universal — cannot run arbitrary quantum algorithms. Quantum advantage over classical optimization solvers has not been conclusively demonstrated.
- Gate Speed
- 20 µs per anneal (full problem solve)
- Fidelity
- Not applicable — stochastic sampling approach
- Advantage
- Operates at room temperature (no cryogenics required), photons travel at the speed of light with minimal decoherence, and photonic hardware is compatible with existing fiber-optic telecommunications infrastructure for quantum networking.
- Challenge
- Deterministic photon-photon interactions are extremely difficult to engineer, making universal fault-tolerant quantum computation challenging. High photon loss rates and detector inefficiencies limit circuit depth. Current GBS machines are specialized rather than general-purpose.
- Gate Speed
- Picoseconds for passive operations; detector timing ~ns
- Fidelity
- Variable; loss-dominated; ~98% for single-photon detectors
Use Case Recommendations
More qubits (4,400 qubits) allows encoding larger problem instances.
Frequently Asked Questions
What is the difference between D-Wave Advantage2 and Xanadu Borealis?
D-Wave Advantage2 uses Annealing while Xanadu Borealis uses Photonic technology. D-Wave Advantage2 offers more physical qubits (4,400 qubits). These QPUs use fundamentally different qubit technologies: Annealing vs Photonic.
Which is better for quantum chemistry, D-Wave Advantage2 or Xanadu Borealis?
For quantum chemistry, gate fidelity is the most critical metric. Compare the 2Q gate fidelity figures in the spec table above to determine which QPU is better suited for your chemistry workload.
How do the prices compare between D-Wave Advantage2 and Xanadu Borealis?
D-Wave Advantage2 is available from $0.3000/task on Amazon Braket. Xanadu Borealis is available from $0.5000/task on Xanadu Cloud. Note that pricing models differ — per-shot pricing is directly comparable while AQT and HQC models depend on circuit structure.
Which QPU has better connectivity, D-Wave Advantage2 or Xanadu Borealis?
D-Wave Advantage2 uses Zephyr connectivity (degree 20) while Xanadu Borealis uses Linear connectivity (degree 2).
What are the coherence times for D-Wave Advantage2 vs Xanadu Borealis?
Coherence time data is not publicly available for either D-Wave Advantage2 or Xanadu Borealis. This is common for quantum annealers and photonic systems where T1/T2 metrics are not directly applicable.
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