Intro to Subnet 2
The world's fastest zkML proving cluster
Subnet 2 is a decentralized zero-knowledge machine learning (zkML) proving network built on Bittensor. It provides verifiable AI inference through cryptographic proofs, enabling any computation to be proven and verified trustlessly.
Network Performance
Proofs Generated
300M+
Unique Miners
1,500+
Proof Time Improvement
10x
Subnet 2's incentive mechanism rewards faster, smaller proofs—driving continuous optimization without central coordination. In 2025, the network improved average proof times by an order of magnitude through competition alone.
What is Proof-of-Inference?
Proof-of-Inference is the core mechanism that powers Subnet 2. When an AI model runs an inference, the network generates a zero-knowledge proof that mathematically guarantees:
The specified model was actually executed
The input data was processed correctly
The output is authentic and untampered
This transforms AI from a black box into a verifiable system where outputs can be cryptographically proven to be correct.
How It Works
REQUEST → SLICE → PROVE → RESPONDRequest: Clients submit inference requests to the network
Slice: Computation is distributed across miners
Prove: Miners generate zero-knowledge proofs in parallel
Respond: Proofs are aggregated and verified, output is returned as cryptographically verified
Network Architecture
Subnet 2 operates on Bittensor's incentive network with two key participants:
Miners receive input data from validators, run inferences through zk-circuits, and return outputs with accompanying proofs. Miners compete on proof generation speed, proof size, and output accuracy. The network is CPU-intensive, providing opportunities for non-GPU miners.
Validators distribute inference requests to miners, verify the returned proofs, and score miners based on performance metrics. Validators can accept external queries, routing organic traffic through the network.
Applications
Studio
Build and deploy your own zero-knowledge circuits. Convert AI models into verifiable circuits that can be proven on the Subnet 2 network.
Stats
Real-time analytics dashboard showing network performance, miner leaderboards, proof generation metrics, and model statistics.
Links
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