What is Bittensor (TAO)?

Bittensor is a blockchain that pays people for useful work done off the chain, mostly in artificial intelligence and computing. The work happens in separate markets called subnets, and rewards are paid in the network's coin, TAO. The original whitepaper, credited to the pseudonymous Yuma Rao, describes models in a peer-to-peer network rating one another and being rewarded for ranking highly.

What is Bittensor used for?

Bittensor is used to create markets for digital commodities. According to its docs, subnets produce things such as compute, inference (running AI models), storage and prediction. Anyone who needs that output can tap a subnet, and anyone who can supply it can compete to earn TAO.

Grayscale Research describes the project as founded in 2021 through a fair launch, with no venture capital presale or insider allocation. Its own blockchain, called Subtensor, produces a block every 12 seconds.

How does a Bittensor subnet work?

Each subnet is an independent incentive market with four kinds of participants:

• Subnet owners design the rules that define what good work looks like.
• Miners produce the work.
• Validators test miners and set weights that score them.
• Stakers back validators with TAO and share in their rewards, minus a fee the validator keeps.

At the end of each period, the chain combines validators' scores, weighted by how much stake each validator has, through Yuma Consensus. The result decides each participant's share of new emissions. The whitepaper says the design includes safeguards against small groups colluding to boost their own rewards.

Since February 2025, under an upgrade known as dynamic TAO, each subnet has its own token, called alpha, traded against TAO in a pool. Staking into a subnet swaps TAO into that subnet's alpha. Grayscale counted 129 active subnets in November 2025.

What is the Bittensor TAO halving?

TAO's supply is capped at 21 million, the same as Bitcoin, and it follows a similar halving pattern. According to Taostats, emissions halve each time half of the remaining supply has been issued.

• The first halving came at 10.5 million TAO issued, cutting emissions from 1 TAO per block to 0.5. It took place in mid-December 2025, with ForkLog reporting it on December 15.
• The second is set for 15.75 million issued, cutting to 0.25 TAO per block.
• The third is set for 18.375 million issued, cutting to 0.125 TAO per block.

Because some TAO is recycled and taken out of circulation, exact halving dates cannot be predicted far ahead. Subnet alpha tokens follow their own separate halving schedule. For comparison, see how the Bitcoin halving works and what tokenomics means.

Is TAO the same as a stake in an AI company?

No. TAO is the network's native token, used for staking and paid out as rewards. It does not represent shares in any company. Its role depends on subnets attracting real demand for what they produce. Before using any subnet or token, it helps to research the project carefully.