Bittensor (TAO), launched by the Opentensor Foundation, is a Layer-1 blockchain fostering collaborative machine learning. Its Proof of Intelligence consensus rewards nodes for valuable ML models. Operating on its custom layer-1 blockchain, Bittensor enables subnets, specialized markets for tasks like text generation or data analysis, where miners deploy ML models and validators assess their outputs. Users might query a subnet for predictive insights, staking TAO to access results, while miners earn rewards based on model performance.