SEI rose about 10% in the week to 8 September 2026. CoinGecko's daily snapshot at 00:00 UTC put it at $0.0489, against $0.0444 on 1 September, which gave a market cap of about $329 million. Since then the bigger news has come from the network, not the price. Sei released v6.7.0 on 5 October 2026, a mandatory mainnet upgrade that brings in parts of its Autobahn consensus work. On 25 October 2026 CoinGecko shows SEI at $0.0527, about 8% above its 8 September level and still about 95% below its all-time high.
Latest: the v6.7 mainnet upgrade (October 2026)
Sei published release v6.7.0 on GitHub on 5 October 2026. The release notes call it "a MANDATORY upgrade" for every pacific-1 (mainnet) node operator and validator. It was scheduled for block height 236,450,000, at roughly 16:30 UTC on 8 October 2026, with a few minutes of expected downtime. Nodes that did not upgrade would halt at that height.
What the release changes, per its notes:
- Autobahn: "Add Autobahn fullnode (CON-309)", "Autobahn hashvault integration" and an
epoch.Registryto track committee and stake. Autobahn is the consensus part of Sei's Giga plan. - FlatKV and EVM state migration: a migration trigger based on a governance proposal, a handler that can pause the migration, and several FlatKV fixes, including one for a cache memory leak.
- Breaking changes for builders: the WebSocket frame limit drops from 10 MiB to 5 MiB. The IBC, capability and feegrant modules are removed. Legacy
sei_andsei2_JSON-RPC methods are gone, except three address and transaction lookup methods.
After v6.7.0 came patch releases v6.7.1 (8 October) and v6.7.2 (16 October 2026). The release page lists v6.7.2 as not mandatory.
Background: Giga's first pieces went live in 6.6 (July–August 2026)
On 31 July 2026 Sei's blog announced that Sei 6.6 would put the first two parts of the "Giga" upgrade on mainnet:
- Ares, "a rebuilt execution client" built on an EVMC backend with evmone as the interpreter. In 6.6 it becomes the default execution path. The older v2 engine stays on as a fallback for each transaction and as a reference node that compares results block by block.
- Eidos, "a new storage layer that will begin moving the chain's history into its own database". It separates EVM history from the database shared with Cosmos state.
The same post mentions "the 200,000 TPS that Sei Giga is targeting". That is a target with no date attached, not measured performance. Consensus, the third component, was due "later" with no date given. The v6.7.0 Autobahn items above are the next step on that front.
Sei's upgrade path, step by step
Step through what has happened to Sei and SEI since the Giga plan began going live, and what is still unconfirmed.
- 31 Jul 2026Sei 6.6 announced with Giga's first two partsdone
Sei's blog said 6.6 would put Ares, a rebuilt execution client, and Eidos, a new storage layer, on mainnet. The same post mentions a 200,000 TPS target with no date attached; it is a target, not measured performance.
- 8 Sep 2026SEI ends the week about 10% higherdone
CoinGecko's 00:00 UTC snapshots put SEI at $0.0489, against $0.0444 on 1 September, about +10.1% on the week, with a market cap of about $329.2M. No source we checked links the move to the upgrade.
- 5 Oct 2026v6.7.0 released as a mandatory upgradedone
The release adds Autobahn fullnode and hashvault components, a governance-based trigger for the EVM state migration to FlatKV, and breaking changes for builders: the WebSocket frame limit drops from 10 MiB to 5 MiB and legacy sei_* and sei2_* JSON-RPC methods are removed, except three lookup methods.
- 8 Oct 2026Mainnet upgrade height and first patchdone
v6.7.0 was scheduled for block height 236,450,000 at roughly 16:30 UTC, with a few minutes of expected downtime; nodes that did not upgrade would halt. Patch release v6.7.1 came the same day.
- 16 Oct 2026v6.7.2 patch releasedone
The release page lists v6.7.2 as not mandatory.
- 25 Oct 2026Where SEI stands nowdone
CoinGecko shows SEI at $0.0527, about 8% above its 8 September level and still about 95% below its $1.14 all-time high. Circulating supply is 6.73 billion out of a total supply of 10 billion.
- No date givenFlatKV migration and the Autobahn consensus switchunconfirmed
v6.7.0 adds the migration trigger and the Autobahn components, but governance has not been shown to trigger the migration, and our sources do not confirm that the consensus switch is live on mainnet.
This timeline covers only the dated steps in the article: it gives no unlock schedule, no forecast for when Autobahn consensus or the FlatKV migration will go live, and it does not explain SEI's price moves.
The week to 8 September in numbers
All figures come from CoinGecko's daily historical snapshots, taken at 00:00 UTC.
| Metric | Value |
|---|---|
| Price, 8 Sep 2026 | $0.0489 |
| Price, 1 Sep 2026 | $0.0444 |
| Seven-day change | about +10.1% |
| Price, 9 Aug 2026 | $0.0415 |
| Thirty-day change | about +17.9% |
| Market cap, 8 Sep 2026 | about $329.2M |
| 24h volume (all venues), 8 Sep 2026 | about $45.5M |
| All-time high | $1.14 (15 Mar 2024) |
| Distance from all-time high, 8 Sep | about 95.7% below |
The move came about five weeks after Sei 6.6 was announced. No source we checked links the price rise to the upgrade, and this article does not claim a cause.
Where SEI stands now (25 October 2026)
- Price: $0.0527 (CoinGecko, updated 25 Oct 2026 08:09 UTC)
- Market cap: about $355.3M, rank #126
- Circulating supply: 6.73 billion SEI, out of a total supply of 10 billion
The gap between circulating supply (6.73 billion) and total supply (10 billion) is 3.27 billion SEI, about a third of all tokens. That is relevant to anyone looking at future supply. Our sources do not give an unlock schedule, so we do not state one.
What to watch
- Whether governance proposals trigger the EVM state migration to FlatKV, and when (v6.7.0 adds the trigger).
- When Autobahn consensus becomes active on mainnet. The release adds the components, but our sources do not confirm that the consensus switch is live.
- Sei's official release notes and blog, the primary sources for upgrade dates.
Limitations: price data comes from a single aggregator (CoinGecko), and upgrade details come from Sei's own blog and GitHub releases.
