IonQ Aria 1 vs Quantinuum H2-1 Specs, Pricing & Performance [2026]
Quick Verdict
Quantinuum H2-1 leads on 2Q gate fidelity (99.91%). Quantinuum H2-1 offers more physical qubits (56 qubits).
Specification Comparison
| Metric | IonQ Aria 1 | Quantinuum H2-1 |
|---|---|---|
| Physical Qubits | 25 | 56 ✓ |
| Technology | Trapped Ion | Trapped Ion |
| 2Q Gate Fidelity | 99.60% | 99.91% ✓ |
| 1Q Gate Fidelity | 99.93% | 99.99% ✓ |
| Readout Fidelity | 99.80% | 99.97% ✓ |
| Quantum Volume | 32,768 | 65,536 ✓ |
| CLOPS | 150 ✓ | 50 |
| T1 (Relaxation) | 1000 ms | 5000 ms ✓ |
| T2 (Dephasing) | 10 ms | 50 ms ✓ |
| 1Q Gate Time | 135 µs | 10 µs ✓ |
| 2Q Gate Time | 600 µs ✓ | 1000 µs |
| Connectivity | All-to-All (deg 24) | All-to-All (deg 55) |
| Max Circuit Depth | 400 | 1,000 ✓ |
| Max Shots | 10,000 | 10,000 |
| Dynamic Circuits | No | Yes |
| Error Mitigation | Available | Available |
| Cloud Platforms | 4 platforms | 4 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: IonQ Aria 1: $30.30 vs Quantinuum H2-1: $368.50
Trapped Ion IonQ Aria 1
| Platform | Price | Status |
|---|---|---|
| Best Amazon Braket | $0.0300/shot | Available |
| Azure Quantum | $0.000970/AQT | Available |
| IonQ Quantum Cloud | $0.000970/AQT | Available |
| qBraid | $0.0300/shot | Available |
Trapped Ion Quantinuum H2-1
| Platform | Price | Status |
|---|---|---|
| Azure Quantum | $275.00/HQC | Available |
| Strangeworks | $300.00/HQC | Limited |
| Best Azure Quantum | $5.50/HQC | Available |
| qBraid | $275.00/HQC | Limited |
Use Case Recommendations
Higher 2Q gate fidelity (99.91%) means fewer errors in VQE/UCCSD circuits.
More qubits (56 qubits) allows encoding larger problem instances.
Higher CLOPS (150) means faster circuit execution for high-repetition workloads.
Supports dynamic circuits and mid-circuit measurement required for active error correction.
Frequently Asked Questions
What is the difference between IonQ Aria 1 and Quantinuum H2-1?
Quantinuum H2-1 leads on 2Q gate fidelity (99.91%). Quantinuum H2-1 offers more physical qubits (56 qubits).
Which is better for quantum chemistry, IonQ Aria 1 or Quantinuum H2-1?
For quantum chemistry simulations (VQE, UCCSD), Quantinuum H2-1 is preferred due to its higher 2Q gate fidelity (99.91% vs 99.60%). Higher gate fidelity directly reduces circuit error rates in chemistry algorithms.
How do the prices compare between IonQ Aria 1 and Quantinuum H2-1?
IonQ Aria 1 is available from $0.0300/shot on Amazon Braket. Quantinuum H2-1 is available from $5.50/HQC on Azure Quantum. 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, IonQ Aria 1 or Quantinuum H2-1?
Both IonQ Aria 1 and Quantinuum H2-1 use All-to-All connectivity. The effective connectivity degree is 24 for IonQ Aria 1 and 55 for Quantinuum H2-1.
What are the coherence times for IonQ Aria 1 vs Quantinuum H2-1?
IonQ Aria 1: T1=1000 ms, T2=10 ms. Quantinuum H2-1: T1=5000 ms, T2=50 ms. Quantinuum H2-1 has longer coherence times, which generally allows for deeper circuits before errors accumulate.
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