0G Galileo Testnet 2026: How to Use the Portal, Faucet, and Explorer Safely

Jack Mercer
July 1, 2026

Galileo is 0G’s third public testnet, and it has outlived the event most people were farming it for. 0G Labs launched its Aristotle mainnet and the 0G token together in September 2025, and the foundation’s airdrop rounds that followed have closed. Galileo is still running, still has a faucet and an explorer, and is still where developers test storage, data-availability and AI-inference workloads before they touch mainnet. This guide explains what 0G is, how Galileo fits around a live mainnet, how to set it up, what the airdrop actually rewarded, and how to avoid the fake “Galileo rewards” pages that keep appearing.

What 0G is building

0G (pronounced “zero gravity”) pitches itself as a decentralized operating system for AI. Instead of a single chain, it is a set of services that share a token and an EVM-compatible base layer:

0G Chain, the EVM-compatible Layer 1 that runs contracts and coordinates the other services.
0G Storage, a decentralized storage network for large datasets and model files. Storage nodes are rewarded through onchain “Flow”, “Mine” and “Reward” contracts.
0G DA, a data-availability layer that other rollups and apps can post data to.
0G Compute, a marketplace for AI inference and related workloads, accessed through a compute-network router.

The idea is that an AI application can store its data, prove that data is available, and buy inference from the same network, settling payments in the 0G token. Whether that stack wins against centralized cloud is an open question, but it explains why the testnet has several explorers and why “using Galileo” can mean very different things.

Galileo, Aristotle and the token launch

Galileo is officially Testnet V3. The team used it for stress benchmarks before the mainnet launch, without publishing detailed figures. On September 21, 2025, 0G Labs ran its token generation event and switched on the Aristotle mainnet at the same time, with a day-one partner list that included Chainlink, Google Cloud, Alibaba Cloud, MetaMask, Coinbase Wallet, Binance Wallet, Ledger, Ankr and Fireblocks.

Before that, the 0G Foundation had raised money through sales of AI alignment nodes and token subscriptions, and 0G Labs raised equity in separate rounds. The practical result for testnet users is simple: 0G already has a live token. Galileo is no longer a “pre-token” testnet, and its own 0G balances are faucet tokens with no market value.

0G Galileo Testnet 2026: How to Use the Portal, Faucet, and Explorer Safely

What the 0G airdrop actually rewarded

A lot of Galileo activity in 2025 was driven by airdrop expectations, so it helps to know what the foundation really paid for. Its September 16, 2025 explainer listed the eligible groups:

Discord roles, eleven of them, including Galactic Guardian, Navigator, 0Gurus, the two Ambassador cohorts, Creators, Pioneer and Memeoors.
Social and quest contributors from Galxe, Intract and similar task campaigns.
Kaito “Yappers” active between February 25 and August 25, 2025, plus the “Yap To Defy Gravity” campaign that ran from August 26 to September 5, 2025.
One Gravity NFT holders (1,888 NFTs), with part of the allocation at TGE and the rest released through random snapshots.

Registration ran through the foundation’s airdrop site at airdrop.0gfoundation.ai, and community recipients had to complete KYC. In a second phase announced in late September 2025, testnet node operators who had run validators reportedly received a fixed allocation with part unlocked at TGE and the rest vesting over three years, and the foundation ran an appeals window that closed in October 2025.

Notice what is missing from that list: ordinary Galileo transactions such as faucet claims, swaps or NFT mints. Some third-party guides presented those as eligibility actions, but the official criteria rewarded community roles, social campaigns, NFT holders and node operators. That history is worth remembering before you spend hours on new testnet tasks.

Is there a reward programme on Galileo now?

At the time of writing, 0G has not announced a new airdrop, points season or incentive programme tied to Galileo activity. The testnet’s role today is development and testing. If 0G or the foundation launches a new campaign, it will be announced on 0g.ai, the official blog and the @0G_labs account on X. Until then, treat any “Galileo season 2 claim” as unverified.

Galileo network settings

These values are from the testnet overview in the official 0G documentation. The docs warn that contract addresses may change during the testnet, so re-check before you build against them.

Setting	Galileo testnet
Network name	0G Galileo Testnet
Chain ID	16602
Token symbol	0G
RPC	evmrpc-testnet.0g.ai (development use)
Chain explorer	chainscan-galileo.0g.ai
Storage explorer	storagescan-galileo.0g.ai
Faucet	faucet.0g.ai, also via Google Cloud’s Web3 faucet

The faucet gives 0.1 testnet 0G per wallet per day. The docs suggest asking in the official Discord if you need more for development. For production-grade RPC, the docs point to third-party providers such as QuickNode, thirdweb, Ankr and dRPC rather than the public endpoint. Mainnet has its own explorers at chainscan.0g.ai and storagescan.0g.ai; do not confuse the two networks in your wallet.

How to use Galileo, step by step

Begin at docs.0g.ai. Open the testnet overview page and copy settings from there. Many old guides still list an earlier Galileo chain ID, because the network was upgraded; the docs are the reference.
Use a separate wallet. Add Galileo to a fresh MetaMask account (or another EVM wallet) that holds no mainnet 0G. Mainnet and testnet share a token symbol, which makes it easy to sign on the wrong network.
Claim from the faucet. Use faucet.0g.ai or the Google Cloud faucet. One claim per day is enough for normal contract testing.
Check your balance on chainscan-galileo. Confirm the transaction landed on the testnet explorer, not the mainnet one.
Try the storage layer. The storage SDK lets you upload a file and then find its record on storagescan-galileo. This is the part of 0G that differs most from a regular EVM chain, and it is where a developer learns the most.
Explore compute if you build AI apps. The docs include a compute-network router guide for sending inference requests through 0G’s provider marketplace on testnet.
Run a node only if you mean it. Storage and DA node guides exist, but they require a server, monitoring and time. Running one because a forum post suggests “node rewards” is not a good reason.

Risks that apply to 0G specifically

Same symbol, two networks. Because both Aristotle and Galileo use “0G” as the ticker, phishing sites can request a mainnet signature while you think you are on testnet. Check the chain ID (16602 for Galileo) in every prompt.
Foundation vs labs domains. Product and docs live on 0g.ai, while the foundation’s airdrop pages used 0gfoundation.ai. Scammers exploit that split with lookalikes such as “0g-foundation” or “0gfoundations”. Only follow foundation links that are posted by official 0G accounts.
KYC phishing. The real airdrop required KYC for community members, so fake “complete KYC to claim” pages are common. The registration windows from 2025 are closed; a new one would be announced publicly, not by direct message.
Node and storage hardware costs. Running storage or DA nodes on testnet costs real money for servers with no reward programme announced.
Testnet state is not permanent. Contract addresses for storage and DA can change, and upgrades have already changed network parameters once.

How to recognise a fake Galileo claim

The pattern is predictable: a post or DM says “0G Galileo testnet rewards are live”, links to a polished page and asks you to connect a wallet. Before clicking, check three things. Is the domain 0g.ai, docs.0g.ai, a Galileo explorer subdomain, or a foundation page linked from @0G_labs? Does the official X account mention the campaign in its own posts, not just in replies? And does the page ask you to approve a token or sign a message on mainnet? Any one failure is enough to close the tab. For a broader look at how projects handle claims, see our WalletConnect WCT claim-safety guide.

FAQ

Is 0G Galileo still running?

Yes. Galileo remains 0G’s public testnet alongside the Aristotle mainnet, with an active faucet and explorers.

Did Galileo testnet users get the 0G airdrop?

The official criteria covered Discord roles, quest and social contributors, Kaito Yappers, One Gravity NFT holders and, in a second phase, testnet node operators. General Galileo transactions were not listed as a qualifying category.

What is the Galileo chain ID?

16602, according to the current testnet overview in the 0G docs. The symbol is 0G.

How much does the faucet give?

0.1 testnet 0G per wallet per day. Developers who need more are directed to the official Discord.

Can I still register for the 0G airdrop?

No. The 2025 registration and appeal windows have closed, and no new airdrop has been announced.

Verdict

0G Galileo is a mature, well-documented testnet for a project whose token is already live. That makes it a good place to learn decentralized storage, data availability and AI compute in practice, and a poor place to farm for a reward that has not been announced. Use the docs for settings, keep testnet and mainnet wallets apart, and only trust claim links that come from 0G’s own accounts.

Faucet tokens have no value, and running nodes costs real money. This article is general information rather than investment advice.