MNISQ: A Large-Scale Quantum Circuit Dataset for Machine Learning in the NISQ Era.

We introduce MNISQ, the first large-scale dataset for both quantum and classical machine learning during the NISQ era, containing 4.95 million circuits of 10 qubits constructed with up to 100 two-qubit gates. MNISQ serves as a foundational resource for developing natural language processing (NLP) models for quantum computing and deep learning models. The dataset is derived from quantum-encoded classical data (e.g., MNIST) and is available in two formats: quantum circuits and classical descriptions (Quantum Assembly Language, QASM).We perform baseline experiments on circuit classification using both quantum and classical methods. Quantum Kernel methods achieve up to 97% accuracy in multiclass classification. We also explore the impact of noise in quantum machine learning, helping develop error-mitigation strategies for noisy hardware. In classical experiments, we use QASM files with NLP models: S4, Transformer, and LSTM. The S4 model reaches 77% accuracy (81% with data augmentation), demonstrating that modern machine learning models can effectively classify quantum circuits.The dataset is publicly available on https://doi.org/10.5281/zenodo.19656638 and related codes are available on GitHub .