The Avalanche C-Chain currently produces a new block about every 1.08 seconds, measured over the most recent blocks on the network. But the more important number is finality: Avalanche consensus makes a transaction irreversible in under a second — among the fastest of any major layer 1.
Block time vs. finality
These two terms get mixed up constantly:
- Block time is the average gap between consecutive blocks. On Avalanche this is not fixed — blocks are produced on demand whenever there are transactions waiting.
- Finality is how long until a transaction can never be reversed. On Avalanche this happens in under a second, because accepted blocks are final immediately — there are no reorgs and no waiting for confirmations.
On Bitcoin, exchanges wait for 3–6 confirmations (30–60 minutes) before treating a deposit as settled. On Avalanche, one accepted block is enough.
How Avalanche compares
- Avalanche C-Chain — ~2s block interval, sub-second finality
- Ethereum — 12s slots, ~13 minutes to full economic finality
- Bitcoin — ~10 minute blocks, probabilistic finality (typically 60 minutes)
- Solana — ~400ms slots, finality after ~32 slots (~13 seconds)
Why it works: Avalanche consensus
Instead of every validator voting on every block (slow) or a single leader proposing blocks (fragile), Avalanche validators repeatedly sample small random subsets of other validators and adopt the majority preference. After a handful of rounds, the whole network converges with overwhelming probability. This is what lets thousands of validators finalize blocks in under a second.
What fast finality means for reputation
Sub-second finality means on-chain history on Avalanche is settled the moment it happens. When SOCI4L reads a wallet's activity to build its reputation profile, every transaction it sees is final — there is no pending window where history could still be rewritten.