Bittensor (TAO) TAO

Bittensor is a blockchain that pays its token, TAO, for machine-learning work that other participants judge useful. What is Bittensor, concretely? A standalone chain called Subtensor hosting up to 128 competing markets, known as subnets. Each subnet sets one job, such as serving AI models or writing code, and rewards the participants who do it best.

The token rules borrow from Bitcoin: a 21 million cap and halvings, with no premine. The first halving, in mid-December 2025, cut new issuance to about 3,600 TAO a day. The way that issuance is shared between subnets has been rewritten twice since February 2025, which most older explainers miss. This page describes the network as it runs in October 2026.

What is Bittensor: an AI marketplace on its own chain

Subtensor is a Substrate-based blockchain with its own runtime. Its code lives in a public GitHub monorepo alongside the Python SDK, the btcli command-line tool and the documentation. The mainnet is called Finney.

Because Substrate is also the toolkit behind Polkadot, people often assume Bittensor is a Polkadot chain. It did win Polkadot parachain auction 36, for a lease running from 13 February 2023 to 18 December 2024, according to The Block Research. In practice it ran as its own layer-1 network instead.

The design goes back to a paper titled “Bittensor: A Peer-to-Peer Intelligence Market”, signed by the pseudonymous Yuma Rao and posted on the official whitepaper page. In it, peers rank how useful each other's models are and record the result on a ledger, with incentives meant to hold up even if colluding peers control up to 50% of network weight. The page gives no date for the paper.

Grayscale's December 2025 SEC filing for its Bittensor fund describes the Opentensor Foundation (OTF) as the network's administrator and says a majority of Subtensor nodes are owned or controlled by it. Jacob Steeves and Ala Shaabana are named as the project's founders in most coverage.

How Bittensor works: subnets, miners and validators

Who does what inside a subnet

According to the official documentation, each subnet has an owner who defines the task and how it is scored. Miners run the models or hardware that do the work. Validators send them requests and grade the answers. Validator permits go to the accounts with the most stake weight: by default up to 128 validators in a subnet of 256 slots (UIDs).

A new miner registers a “neuron” by paying a fee that is recycled into the supply. If the subnet is full, the newcomer pushes out the lowest-ranked neuron whose immunity period has run out.

Yuma Consensus turns grades into TAO

Scores are settled once per epoch, which Bittensor calls a tempo. The default tempo is 360 blocks, roughly 72 minutes. Validators submit weights over the miners they have tested, and Yuma Consensus combines them, weighted by each validator's stake. Weights far above what most stake supports are clipped back to the consensus level, so a single validator cannot inflate a friend's score. The result sets each miner's share of emissions.

The root network and how stake is counted

Subnet zero, the root network, is where TAO is staked directly rather than swapped into a subnet token. Root stake counts toward a validator's weight on every subnet at once, at a discount. On mainnet a validator's stake weight on a subnet equals its alpha (that subnet's token) plus 0.18 times its root TAO, a factor set by governance.

Bittensor halving and TAO supply

There will never be more than 21,000,000 TAO. A block arrives about every 12 seconds, and until the first halving each block issued 1 TAO, or about 7,200 a day.

Halvings follow issuance, not block counts

A Bitcoin halving arrives after a fixed number of blocks, so its date can be estimated years ahead. Bittensor halves when total issuance crosses a threshold set at the midpoint of the remaining supply: 10.5 million, then 15.75 million, and so on. Grayscale Research had expected the first one as soon as 14 December 2025; Taostats records it on 15 December.

Recycling is what makes the timing hard to pin down. Recycled TAO is subtracted from total issuance and can be emitted again, so heavy recycling pushes the next halving further out. The second halving, which will cut emission to 0.25 TAO per block, has no official date, and Taostats notes that recycling makes it hard to predict. Older articles that describe a halving “every 10.5 million blocks” rely on a rule the network does not use.

Recycled TAO versus burned TAO

Registration costs and transaction fees, including fees paid on Bittensor's EVM layer, are recycled instead of going to block producers. Burned tokens work differently. They stay counted in issuance and are gone for good, so burning does not delay a halving.

Creating a subnet requires a lock, not a refundable deposit. The price doubles each time anyone registers a subnet, then decays in a straight line over about two weeks (100,800 blocks), with a default floor of 1,000 TAO. The whole lock becomes the new subnet's starting TAO reserve.

No presale and no premine

TAO was never sold in an ICO or presale. The founding team mined its tokens on the same terms as everyone else, according to CoinMarketCap Academy and the Crypto Valley Journal.

Dynamic TAO and alpha tokens

The largest redesign so far, Dynamic TAO (dTAO), went live on mainnet on 13 February 2025 after a vote of the senate, the governance body of the time. The documentation gives block 4,920,351 as the first dTAO block.

Since then every subnet has had its own alpha token and an automated market maker pool holding a TAO reserve and an alpha reserve. The alpha price is the TAO reserve divided by the alpha reserve. Staking into a subnet means swapping TAO for its alpha at that price. All existing stake was converted to root TAO stake at the switch, and the new pools opened with very little liquidity.

FalconX counted 64 subnets at the dTAO launch and 128 by May 2026, which is the current limit in the documentation; the community has discussed raising it to 256. Inside each subnet, the default split of alpha emissions per tempo is 18% for the owner, 41% for miners and 41% for validators and the people who stake with them. Owners can change that split within limits.

Emission rules changed twice in 16 months

From February to November 2025, each subnet's share of TAO emissions followed its token price. In November 2025 the OTF switched to a flow-based model known as Taoflow, driven by a moving average of TAO staked minus TAO unstaked in each subnet. Subnets with net outflows got nothing.

Subnet teams responded by buying back their own tokens and burning miner incentives. FalconX, citing Taostats, counted 67 of 128 subnets burning 99% or more of their incentives as of 16 April 2026.

In June 2026 the network went back to price-based allocation. A Bittensor guide updated on 3 August 2026 dates the flow model from November 2025 to June 2026 and marks it deprecated. Each subnet's share now follows a moving average of its token price, with an adjustment that trims very small shares.

Deregistration and the June 2026 emissions cut

dTAO removed subnet deregistration; it came back in September 2025, ranked by price. Once all 128 slots are taken, a new registration prunes the non-immune subnet with the lowest moving-average alpha price. New subnets are protected for about six months (1,296,000 blocks).

On 22 June 2026, co-founder Jacob Steeves, known as “Const”, announced on Discord that subnets judged inactive would stop receiving emissions: those with no miner distribution or no working code. OurCryptoTalk put the number at 57 of 128; HackerNoon wrote “more than 50”. The list is reviewed weekly and subnets can be reinstated case by case. A disabled subnet's share goes to the others.

Bittensor history: key dates

Dates before 2023 come from Messari's history of the project as relayed by other publications; the often-quoted 2019 start year could not be confirmed.

What Bittensor is used for: notable subnets

Subnet line-ups change fast. The examples below come from 2026 coverage and the projects' own sites, checked in October 2026. Revenue figures published by subnet teams are unaudited, so they are left out.

Chutes, subnet 64, sells serverless compute for deploying and running open-source AI models. FalconX ranked it the largest subnet by market value in May 2026. Under the flow model, Pine Analytics estimated in March 2026 that Chutes alone received about 14.4% of all emissions.

Targon, subnet 4, comes from Manifold Labs: an on-demand GPU platform for training and inference that uses confidential computing based on Intel TDX. Ridges, subnet 62, runs autonomous agents that write, test and debug code.

Training is another cluster. Templar (subnet 3) completed a decentralized training run on a 72-billion-parameter language model, then lost its team, Covenant, in April 2026. Gradients (56) and IOTA (9) also work on model training, while Sportstensor (41) builds prediction models for sports and markets.

How to stake TAO and delegate to a validator

Most holders stake through a validator and receive part of its dividends, minus a commission called the take. Our staking explainer covers the general idea; Bittensor adds a choice of where to stake.

Root staking keeps you in TAO and spreads your validator's weight across every subnet at the 0.18 discount. Subnet staking swaps your TAO into that subnet's alpha, which counts in full there but exposes you to the token's price and to slippage in a thin pool. Pine Analytics estimated that about 70% of TAO supply was staked.

How to buy Bittensor and where to keep it

As of October 2026, TAO has spot markets on Binance (since April 2024), Coinbase (since February 2025, labelled experimental), Kraken, OKX (spot since 30 June 2026), Bitget, Crypto.com and Bitpanda. Bybit lists only a perpetual futures contract and Gemini does not offer the token. Our step-by-step guide to buying crypto explains how to compare platforms and place a first order.

Coins left on an exchange depend on that exchange's solvency and security. Self-custody means learning Bittensor's two-key model: a coldkey that holds funds and should stay offline, and a hotkey that signs day-to-day network operations. Check that the receiving wallet supports the Bittensor network, and install software only from official sources. The 2024 theft started with a poisoned Python package.

TAO ETF filings and a staked ETP in Europe

In Europe, the Safello Bittensor Staked TAO ETP (ticker STAO, issued by DDA ETP AG) started trading on SIX Swiss Exchange in US dollars, according to a Deutsche Digital Assets release dated 19 November 2025. The product stakes its coins and has a maximum fee of 1.49% a year. It was later cross-listed on Nasdaq Stockholm, and on Euronext Paris, in euros, on 2 June 2026.

In the United States, Grayscale filed an S-1 registration with the SEC on 30 December 2025 to turn its Bittensor Trust, already quoted over the counter as GTAO, into an ETF on NYSE Arca. Bitwise filed the same day for a TAO strategy ETF that could hold up to 60% of its assets in TAO directly, according to The Block. Grayscale amended its filing in 2026; as of October 2026 we found no approval for either fund.

Some listed companies hold TAO directly. TAO Synergies (Nasdaq: TAOX), formerly the biotech Synaptogenix, and xTAO (TSX Venture: XTAO.U) both hold and stake it. Their latest holdings are not confirmed here.

Bittensor risks

Emissions and stake are concentrated

In its March 2026 bear case, Pine Analytics found that the ten largest subnets took about 56% of emissions. It also estimated that subnet revenue falls far short of the TAO they receive, putting Chutes' subsidy ratio at roughly 22 to 40 to 1. That is one firm's estimate built partly on self-reported revenue, not an audited figure.

Governance sits with a small group

Bittensor's documentation says the senate that approved dTAO has been removed from the runtime, while root-only parameters are still changed with a sudo key, which can be operated through a multisig. In April 2026 Covenant left the network, citing concerns about Steeves' control, and sold its subnet tokens; their prices fell by up to 40% almost immediately, according to FalconX. Steeves disputed many of Covenant's claims. The June 2026 emissions cut was also announced by Steeves.

Alpha tokens carry extra risk

Subnet tokens trade in shallow pools, so large orders move the price. A subnet can be pruned when it ranks lowest at the 128 cap, or lose its emissions entirely, as more than 50 did in June 2026. The allocation rules themselves have changed twice since dTAO launched.

The July 2024 wallet theft

On 2 July 2024 attackers drained about 32,000 TAO from user wallets, worth around $8 million at the time, according to The Block. The source was a malicious version (6.12.2) of the Bittensor package on PyPI; users who installed it between 22 and 29 May and then staked, delegated or transferred were exposed. The attack began at 19:06 UTC. At 19:41 UTC validators were put behind a firewall and transactions stopped. The documentation says the chain stayed in safe mode until 12 July 2024. For ten days, the decision of a small group kept every holder's transfers on hold.

The design adds its own friction. Coldkeys and hotkeys, root versus subnet staking and alpha pools give users more ways to make a costly mistake than a plain transfer coin does.

Regulation is unsettled

Under the EU's MiCA rules, TAO has no identifiable issuer and is not a stablecoin, so it counts among “other crypto-assets”. Platforms that admit it to trading are responsible for a MiCA white paper. We found none for TAO in the ESMA register, which does not prove none exists; our guide to MiCA regulation explains those obligations. In the US, the Grayscale and Bitwise TAO funds are still filings, and Coinbase tags the token experimental.

Competition in decentralized AI

Comparison searches most often pair Bittensor with NEAR, which also markets itself around AI, along with Render, Fetch.ai and the ASI alliance, and ICP. Their designs differ: NEAR is a general-purpose smart contract chain, while Bittensor exists to pay for AI work.

The next fixed points are the second halving, due when issuance reaches 15.75 million TAO, and the SEC's response to the Grayscale and Bitwise filings.