You can try IBM quantum computers remotely through IBM Quantum Platform—no quantum hardware purchase or local processor is required. For a visual introduction, use IBM Quantum Composer; to submit programs from Python, set up Qiskit Runtime with an IBM Cloud Quantum Compute instance, an API key, and that instance’s CRN. The key distinction is that a simulation is not a run on a real quantum processor (QPU).
Choose a route: simulation, Composer, or Python
Pick the route based on whether you want to learn circuit structure, run on hardware, or write a repeatable program. IBM Quantum Composer is a graphical tool for building circuits, inspecting visualizations, and generating OpenQASM or Python. IBM describes it as a tool for building circuits and running them on quantum hardware (IBM Quantum Composer documentation).
| Route | What you do | Access and cost | Best first use |
|---|---|---|---|
| Composer without signing in | Build a small circuit and inspect its simulated visualization. | Simulation only; IBM documents unsigned visualization for circuits of up to four qubits. No hardware execution. | Learn gates and circuit structure. |
| Composer after signing in | Build a circuit in the visual editor and choose hardware when available to your account. | Signing in and service access are required for hardware execution. | Try a circuit on hardware without writing Python. |
| Qiskit Runtime from Python | Install the Qiskit packages, authenticate to a Quantum Compute instance, and submit a job. | IBM advertises up to 10 minutes of Open Plan QPU runtime per month at no charge. Its product page lists pay-as-you-go starting at $96 USD per minute. Check IBM’s current plans and eligibility before relying on either figure. | Build reproducible programs and use a code-first workflow. |
For unsigned Composer use, the four-qubit limit describes simulated visualization—not access to a four-qubit hardware device. The visualization is not evidence that a QPU ran your circuit. To keep a Composer circuit for another session, save or download its circuit file.
Use IBM Quantum Composer for a first visual experiment
- Open IBM Quantum Composer.
- Drag operations onto the circuit canvas to create a circuit, then inspect the available visualization.
- If you are not signed in, treat the result as a simulation; IBM documents unsigned visualizations for up to four qubits.
- Sign in and use the available hardware execution option if you want a real QPU run and your account has service access. Check the selected backend and job status in the platform.
- Save or download the circuit file if you want to retain it for a later session. Composer can also generate OpenQASM or Python for use outside the visual editor.
Set up Qiskit Runtime to submit a circuit from Python
The code-first path requires more than installing a library: you need an IBM Cloud account, a Quantum Compute service instance you can use, an API key, the instance’s Cloud Resource Name (CRN), and a configured Python environment. Follow IBM’s current Qiskit Runtime setup guide and first hardware program guide for the current package and submission instructions.
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- Sign in and choose the intended account and region. Use IBM Quantum Platform’s account switcher to confirm the IBM Cloud account and region you intend to use. IBM says the selected region determines where jobs run and data is kept; only service instances created in that region are visible.
- Get access to a Quantum Compute instance. Create an instance or accept an invitation to one managed by an administrator. Confirm that it appears in the selected region. If it does not, check the account and region rather than assuming the instance is available everywhere.
- Create an API key and copy the instance CRN. Create the key in IBM Cloud and store it securely; IBM notes that it is not shown again after creation. Copy the CRN from the instance’s entry on the Instances page.
- Install the SDK packages in an active Python environment. Install Qiskit and
qiskit-ibm-runtimeusing the commands in IBM’s current setup guide. Keeping them in the environment used to run your program helps avoid installing into one Python environment and executing from another. - Authenticate and submit a job. Initialize
QiskitRuntimeServicewith your cloud API token and the instance CRN, then follow IBM’s first-program guide to select an available backend and submit the circuit. Never put a real token in shared or public code.
IBM’s concise initialization pattern is to instantiate QiskitRuntimeService with the cloud API token and instance CRN. Use the exact current parameter names and code from IBM’s guide rather than copying credentials into an example. IBM notes that locally saved credentials are stored as plain text, not encrypted. Save them only in a trusted environment; on a public or untrusted computer, follow IBM’s untrusted-environment instructions and do not persist a key locally.
Understand plans, backend access, and waiting
As of October 4, 2026, IBM advertises the Open Plan as providing up to 10 minutes of QPU runtime per month at no charge and lists pay-as-you-go from $96 USD per minute on its Quantum pricing page. These are IBM product-plan figures, not independent estimates; plan terms, eligibility, and prices can change. Check the live page and your platform account before choosing a plan or submitting work that may incur charges.
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Do not assume that signing in guarantees access to every processor or that jobs finish within a particular time. Backend availability and queue waits can vary. Inspect the backends and access shown for your instance in IBM Quantum Platform before selecting a target; there is no universal queue-time promise established here.
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How to tell whether a circuit ran on hardware
- Simulation: An unsigned Composer visualization is simulated. It helps you inspect a circuit’s expected behavior, but it is not a hardware job.
- Hardware execution: A signed-in Composer run or a Qiskit Runtime submission must use an available hardware backend through your service access. Check the selected backend and job details in the platform rather than inferring execution from a circuit diagram or visualization alone.
- Access issue: If the instance or expected hardware is missing, verify the account, selected region, and instance access. IBM’s region setting controls which instances are visible and where jobs and data are handled.
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