IBM’s 433-qubit quantum processor is IBM Osprey, announced on November 9, 2022. It has more than three times the physical qubits of IBM’s 127-qubit Eagle processor, but that count alone does not show how useful a quantum computer is: error rates, execution speed, and system design matter too.
What is IBM Osprey?
Osprey is an IBM quantum processor, or chip, containing 433 physical qubits. IBM unveiled it at its Quantum Summit in 2022 and described it as a step toward running more complex quantum computations. IBM executive Darío Gil said the processor brought the company closer to using quantum computers to tackle previously unsolvable problems. That was IBM’s statement of ambition, not a demonstration that Osprey had already solved such problems.
Osprey is real quantum-computing hardware, but it is not a consumer computer you can buy and use like a laptop. IBM quantum processors are accessed as part of enterprise and cloud-based quantum systems.
How Osprey compares with Eagle
| Measure | IBM Osprey | IBM Eagle |
|---|---|---|
| Physical qubits | 433, announced by IBM in 2022 | 127, cited by IBM in its 2022 comparison with Osprey |
| Design and wiring | Retains Eagle’s multi-level wiring approach and adds integrated filtering, according to IBM’s technical account | Uses the multi-level wiring approach that Osprey retained; the cited account does not specify integrated filtering for Eagle |
| Processor-specific quality or speed figures | Not stated in the cited IBM sources | Not stated in the cited IBM sources |
The qubit comparison is straightforward: 433 is more than three times 127. It does not mean Osprey can perform every quantum task three times faster or more accurately. Qubit count is one measure of scale, not a complete performance score.
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What changed in Osprey’s design?
IBM’s technical description says Osprey kept Eagle’s multi-level wiring approach and added integrated filtering. The filtering was intended to reduce noise and improve stability, while the wiring design aimed to make it possible to scale the processor without losing signal-routing flexibility. Those are engineering goals; the cited material does not provide a standalone Osprey error-rate result or a direct Eagle-versus-Osprey benchmark.
How to interpret IBM’s performance figures
IBM tracks quantum-computing progress across scale, quality, and speed. Scale includes physical qubit count; quality includes measures such as quantum volume and error rates; speed includes CLOPS, or circuit layer operations per second. These measures describe different aspects of a system, so none should be treated as a substitute for the others.
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- Quantum volume: IBM reported an increase from 128 to 512 in 2022. This is a platform-level figure in IBM’s reporting, not a result attributed solely to Osprey.
- CLOPS: IBM reported an increase from 1.4k to 15k on Falcon chips, surpassing its 10k target. These figures likewise do not establish Osprey’s individual execution speed.
- Error rates: Error rates affect the reliability of quantum operations. The cited sources do not provide a specific Osprey error-rate figure for a direct processor comparison.
As a result, the 433-qubit headline answers how many physical qubits Osprey has, not what workloads it can reliably complete or whether it outperforms a particular classical computer on a useful task.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Where Osprey fits in IBM’s roadmap
IBM presented Osprey as a milestone toward modular quantum systems and Quantum System Two, alongside a historical roadmap target for systems exceeding 4,000 qubits. That target was a plan announced in 2022, not a statement of what Osprey itself contained or a guarantee of a later delivery date.
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IBM’s current hardware page highlights Eagle and Heron processors and describes a continuing roadmap toward near-term quantum advantage and a future fault-tolerant system. Osprey is therefore best understood as a significant 2022 scale milestone, not as IBM’s current flagship processor.
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