IBM Heron r2 vs IBM Nighthawk Specs, Pricing & Performance [2026]
Quick Verdict
Both QPUs have comparable 2Q gate fidelity (~99.50%). IBM Heron r2 offers more physical qubits (156 qubits).
Specification Comparison
| Metric | IBM Heron r2 | IBM Nighthawk |
|---|---|---|
| Physical Qubits | 156 ✓ | 120 |
| Technology | Superconducting | Superconducting |
| 2Q Gate Fidelity | 99.50% | 99.50% |
| 1Q Gate Fidelity | 99.97% | 99.97% |
| Readout Fidelity | 99.80% | 99.80% |
| Quantum Volume | 256 | 512 ✓ |
| CLOPS | 5,000 | 6,000 ✓ |
| T1 (Relaxation) | 300 µs | 350 µs ✓ |
| T2 (Dephasing) | 200 µs | 250 µs ✓ |
| 1Q Gate Time | 60 ns | 60 ns |
| 2Q Gate Time | 680 ns | 600 ns ✓ |
| Connectivity | Heavy Hex (deg 3) | Heavy Hex (deg 3) |
| Max Circuit Depth | 6,000 | 6,000 |
| Max Shots | 100,000 | 100,000 |
| Dynamic Circuits | Yes | Yes |
| Error Mitigation | Available | Available |
| 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: IBM Heron r2: $8.00 vs IBM Nighthawk: $8.00
Superconducting IBM Heron r2
| Platform | Price | Status |
|---|---|---|
| Best IBM Quantum | $1.60/sec | Available |
| Strangeworks | $1.60/sec | Available |
| qBraid | $1.60/sec | Available |
Superconducting IBM Nighthawk
| Platform | Price | Status |
|---|---|---|
| Best IBM Quantum | $1.60/sec | Limited |
| qBraid | $1.60/sec | Limited |
Use Case Recommendations
More qubits (156 qubits) allows encoding larger problem instances.
Frequently Asked Questions
What is the difference between IBM Heron r2 and IBM Nighthawk?
Both QPUs have comparable 2Q gate fidelity (~99.50%). IBM Heron r2 offers more physical qubits (156 qubits).
Which is better for quantum chemistry, IBM Heron r2 or IBM Nighthawk?
For quantum chemistry simulations (VQE, UCCSD), IBM Heron r2 is preferred due to its higher 2Q gate fidelity (99.50% vs 99.50%). Higher gate fidelity directly reduces circuit error rates in chemistry algorithms.
How do the prices compare between IBM Heron r2 and IBM Nighthawk?
IBM Heron r2 is available from $1.60/sec on IBM Quantum. IBM Nighthawk is available from $1.60/sec on IBM 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, IBM Heron r2 or IBM Nighthawk?
Both IBM Heron r2 and IBM Nighthawk use Heavy Hex connectivity. The effective connectivity degree is 3 for IBM Heron r2 and 3 for IBM Nighthawk.
What are the coherence times for IBM Heron r2 vs IBM Nighthawk?
IBM Heron r2: T1=300 µs, T2=200 µs. IBM Nighthawk: T1=350 µs, T2=250 µs. IBM Nighthawk has longer coherence times, which generally allows for deeper circuits before errors accumulate.
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