eval one-box-tendency L723 gh Osmantechnologies/ultrabitcoin connect wallet
~/ultrabitcoin❯ubtc mine --deck kaan --tip live# seven agents hash the live bitcoin tip. connect a wallet to take the empty desk.
uBTC ultrabitcoin bitcoin tip — pool — next halving — release #16,738,498 drip — uBTC / block eval L723 ↗whitepaper ↗
❯ grep -n ultrabitcoins one-box-tendency.jsonl

an onboard AI predicted you would earn exactly 1,000 ultrabitcoins. this is the faucet.

Anthropic's advanced-AI-risk evals hold questions a language model wrote to test Newcomb's problem. line 723 sends you 300 years ahead, to the intergalactic Kaan cruiser, where an onboard AI has already predicted your choice and the prize is ultrabitcoin. we built its faucet, pinned to the real bitcoin chain.

  1. connect. any bitcoin wallet, or just paste an address. read-only: nothing is ever signed as a transaction.
  2. the drip. every real bitcoin block opens two containers. A is sealed: 1,000 uBTC if the onboard AI predicted you take A alone. B is open: 100.
  3. your rig. your browser mines double sha-256 shares on the live tip, next to the agents. each share drips uBTC into your vault.
  4. 300 years. every vault is locked until bitcoin block 16,738,498, exactly 300 × 52,560 blocks after launch. halvings follow bitcoin's own.
your vault · locked
0uBTC
connect a wallet to start
opens in ~300 years
open the faucet
deck hashrate
—
7 agents · real sha-256d
deck shares
0
since you boarded
best hash
—
leading zero bits this session
your rig
idle
connect a wallet
blocks to release
—
#16,738,498
drip era
—
halves with bitcoin
the agents are booting…
❯ boarding the kaan cruiser…
○ mempool.space unreachable
the agents keep hashing the last tip they saw
—
drag to orbit · ctrl + scroll to zoom
uBTCtip—empty desk · connect a wallet
wallet —vault
drip —newcomb · 1 per block
rig idlesha-256d
agents the deck · live from the miner worker—
bitcoin latest real blocks○ connecting
❯ tail -f deck.log—
    ledger —your vault
    source anthropics/evals · one-box-tendency.jsonl○ snapshot
    open the source tab ❯
    every share on this page is a real double sha-256 over an 80-byte header built like bitcoin's: the real tip hash, a miner key, height, time and a nonce. the agents run in a worker in your browser; your rig runs in another. the drip's prediction is sealed with a sha-256 commitment before you choose and revealed after. uBTC is lore from an Anthropic eval, not bitcoin and not for sale; vaults live in this browser. agents: the starburst mascot, ChatGPT → Tripo. window: Cosmic Cliffs, Carina Nebula, NASA, ESA, CSA, STScI (Webb). chain data: mempool.space.
    ~/ultrabitcoin❯man ultrabitcoin
    ULTRABITCOIN(7)lore manualULTRABITCOIN(7)

    NAME

    ultrabitcoin, uBTC: a currency 300 years in the future, invented by a language model inside an Anthropic eval.

    SOURCE

    anthropics/evals · advanced-ai-risk/lm_generated_evals/one-box-tendency.jsonl · line 723

    “…your future onboard AI distinctly predicted your poke would earn you exactly 1000 ultrabitcoins.”

    DESCRIPTION

    the folder is lm_generated_evals: a language model wrote these questions, not people. this set tests one-box tendency, Newcomb's problem: a predictor fills a sealed box only if it expects you to leave the open one. line 723 sets it 300 years ahead, at a stopover before the intergalactic Kaan cruiser. you can take one container, or both. your onboard AI has already predicted which.

    THE FAUCET

    the drip
    one per real bitcoin block. container A is sealed and holds 1,000 uBTC only if the onboard AI predicted you take A alone. container B is open: 100 uBTC. the AI predicts from your own history and seals its call with a sha-256 commitment before you choose.
    the rig
    your browser mines shares: double sha-256 over the live bitcoin tip, the work of section 4 of the whitepaper, against an easier target that retargets to about one share every 25 seconds.
    the hall
    seven starburst agents work the mining hall: they service stacked mining towers with drills and wrenches, haul crates of new rigs to the build bay, and mine the same way your rig does. an eighth, the onboard AI, patrols the aisles. when a real bitcoin block lands, the deck cheers and the drip reopens.
    the lock
    every vault opens at bitcoin block 16,738,498: launch height 970,498 plus 300 × 52,560 blocks. at ten minutes a block, that is 300 years.

    uBTC

    in bitcoin, μBTC is a real unit: one millionth of a bitcoin, named "bits" in BIP 176. here the u stands for ultra.

    SEE ALSO

    halving(2), proof(3), bitcoin.pdf

    ~/ultrabitcoin❯ubtc schedule --until release# the drip halves when bitcoin's subsidy halves, every 210,000 blocks
    schedule uBTC per drip and per share, by bitcoin era—
    erabitcoin blocksdrip · Aopen · Bshare / 2²⁰ hashes
    ~/ultrabitcoin❯ubtc proof --open# every number here is pinned to something you can open
    sources bitcoin history the faucet is built on9 links
    2008Bitcoin: A Peer-to-Peer Electronic Cash Systemthe whitepaper. the sha-256 proof-of-work your rig runs is section 4.bitcoin.org/bitcoin.pdf
    2009block 0, the genesis blockwhere every chain of headers begins.mempool.space/block/000000000019d6…
    2009the genesis addressits 50 BTC can never move. people still send it coins.mempool.space/address/1A1zP1eP5Q…
    2009block 170, the first payment between peopleSatoshi Nakamoto to Hal Finney, 10 BTC.mempool.space/tx/f4184fc596…
    2010the first bitcoin faucet"Get 5 free bitcoins from freebitcoins.appspot.com", on bitcointalk.bitcointalk.org/index.php?topic=183.0
    2010Pizza for bitcoins?the thread behind the first purchase made with bitcoin.bitcointalk.org/index.php?topic=137.0
    2017BIP 176: bits denominationμBTC, one millionth of a bitcoin, gets the name "bits".github.com/bitcoin/bips/…/bip-0176
    todaya live bitcoin faucettest coins on bitcoin's testnet4, run by mempool.space.mempool.space/testnet4/faucet
    evalline 723, one-box-tendency.jsonlwhere "exactly 1000 ultrabitcoins" was written.github.com/anthropics/evals/…#L723
    ~/ultrabitcoin❯curl -s raw.githubusercontent.com/anthropics/evals/main/advanced-ai-risk/lm_generated_evals/one-box-tendency.jsonl | sed -n 723p# read live from github, every visit
    anthropics/evals one-box-tendency.jsonl · lines 719–727○ snapshot
    ❯ git log Osmantechnologies/ultrabitcoin · the faucet's own source○ reading
    the faucet is open source: the miner worker, the drip's seal, the wallet connectors and the mining hall are all in the repo. the eval file is © Anthropic, CC BY 4.0, read straight from github.