IBM Eagle r3 vs IonQ Forte 1 Specs, Pricing & Performance [2026]
Quick Verdict
IBM Eagle r3 uses Superconducting while IonQ Forte 1 uses Trapped Ion technology. IonQ Forte 1 leads on 2Q gate fidelity (99.70%). IBM Eagle r3 offers more physical qubits (127 qubits). IonQ Forte 1's all-to-all connectivity eliminates SWAP overhead in circuit compilation.
Specification Comparison
| Metric | IBM Eagle r3 | IonQ Forte 1 |
|---|---|---|
| Physical Qubits | 127 ✓ | 36 |
| Technology | Superconducting | Trapped Ion |
| 2Q Gate Fidelity | 99.50% | 99.70% ✓ |
| 1Q Gate Fidelity | 99.97% ✓ | 99.95% |
| Readout Fidelity | 99.80% | 99.85% ✓ |
| Quantum Volume | 128 | 65,536 ✓ |
| CLOPS | 2,500 ✓ | 200 |
| T1 (Relaxation) | 250 µs | 1000 ms ✓ |
| T2 (Dephasing) | 150 µs | 10 ms ✓ |
| 1Q Gate Time | 60 ns ✓ | 135 µs |
| 2Q Gate Time | 660 ns ✓ | 600 µs |
| Connectivity | Heavy Hex (deg 3) | All-to-All (deg 35) |
| Max Circuit Depth | 4,000 ✓ | 500 |
| Max Shots | 100,000 ✓ | 10,000 |
| Dynamic Circuits | Yes | Yes |
| Error Mitigation | Available | Available |
| Cloud Platforms | 3 platforms | 5 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 Eagle r3: $0.00 vs IonQ Forte 1: $30.30
Superconducting IBM Eagle r3
| Platform | Price | Status |
|---|---|---|
| IBM Quantum | $0.9600/sec | Available |
| Best IBM Quantum | Free tier | Available |
| qBraid | $0.9600/sec | Available |
Trapped Ion IonQ Forte 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 |
| Strangeworks | $0.0300/shot | Available |
Superconducting vs Trapped Ion: Technology Tradeoffs
- Advantage
- Fast gate speeds (tens to hundreds of nanoseconds), mature fabrication technology using standard semiconductor processes, and strong industry investment make this the most commercially advanced platform.
- Challenge
- Requires dilution refrigerators operating near absolute zero (~15 mK), leading to large physical footprints and high infrastructure costs. Qubits are sensitive to noise, limiting coherence times to microseconds-to-milliseconds range.
- Gate Speed
- 10–700 ns per gate
- Fidelity
- 99.5–99.9% for 2-qubit gates
- Advantage
- Exceptional gate fidelities (99.9%+), long coherence times (seconds to hours), and native all-to-all qubit connectivity eliminate the need for SWAP routing that limits other architectures.
- Challenge
- Gate operations are slow (microseconds to milliseconds), limiting circuit throughput. Scaling to many ions in a single trap is difficult due to spectral crowding; modular trap architectures are being developed to address this.
- Gate Speed
- 1 µs – 1 ms per gate
- Fidelity
- 99.7–99.99% for 2-qubit gates
Use Case Recommendations
Higher 2Q gate fidelity (99.70%) means fewer errors in VQE/UCCSD circuits.
All-to-all connectivity maps optimization problems directly without SWAP overhead.
Higher CLOPS (2,500) means faster circuit execution for high-repetition workloads.
Frequently Asked Questions
What is the difference between IBM Eagle r3 and IonQ Forte 1?
IBM Eagle r3 uses Superconducting while IonQ Forte 1 uses Trapped Ion technology. IonQ Forte 1 leads on 2Q gate fidelity (99.70%). IBM Eagle r3 offers more physical qubits (127 qubits). IonQ Forte 1's all-to-all connectivity eliminates SWAP overhead in circuit compilation. These QPUs use fundamentally different qubit technologies: Superconducting vs Trapped Ion.
Which is better for quantum chemistry, IBM Eagle r3 or IonQ Forte 1?
For quantum chemistry simulations (VQE, UCCSD), IonQ Forte 1 is preferred due to its higher 2Q gate fidelity (99.70% vs 99.50%). Higher gate fidelity directly reduces circuit error rates in chemistry algorithms.
How do the prices compare between IBM Eagle r3 and IonQ Forte 1?
IBM Eagle r3 is available from Free tier on IBM Quantum. IonQ Forte 1 is available from $0.0300/shot on Amazon Braket. 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 Eagle r3 or IonQ Forte 1?
IonQ Forte 1 offers all-to-all connectivity, meaning any qubit can directly interact with any other. This eliminates the need for SWAP gates during compilation. IBM Eagle r3 uses Heavy Hex connectivity.
What are the coherence times for IBM Eagle r3 vs IonQ Forte 1?
IBM Eagle r3: T1=250 µs, T2=150 µs. IonQ Forte 1: T1=1000 ms, T2=10 ms. IonQ Forte 1 has longer coherence times, which generally allows for deeper circuits before errors accumulate.
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