Arknights: Endfield 1.5 is live — official maintenance window, mail rewards, codes status

Updated October 11, 2026

Arknights: Endfield 1.5 launched on 2 September 2026. GRYPHLINE’s official update notes scheduled maintenance for 06:00–12:00 UTC+8 (1 September 17:00–23:00 UTC-5). The notice says reopening could be earlier or later; the published window is not proof of the actual reopening minute. The date display above does not treat the planned maintenance end as a verified launch minute.

Date correction: Until 24 August, this page inferred 30 August from a third-party Liino banner window. GRYPHLINE later confirmed 2 September. The official Liino notice tied the banner end to version maintenance, so the earlier 30 August closing claim was also superseded.

How the timing became official: the 22 August DEV Comm named the version and the 24 September RE-Factor banner but did not give a maintenance hour. GRYPHLINE later published the 31 August pre-download notice and version update notes, both specifying the 06:00–12:00 UTC+8 planned window. The earlier 11:00 estimate from past updates was not the published 1.5 schedule.

As of 11 October, 1.5 remains the released version; GRYPHLINE has announced the next version, Sanctuary of Ink, for 15 October.

2 September launch: the official maintenance window

GRYPHLINE scheduled maintenance for 06:00–12:00 UTC+8 on 2 September, or 17:00–23:00 UTC-5 on 1 September. The scheduled end equals 04:00 UTC. The publisher warned that reopening could move earlier or later, so these are planned times rather than verified actual unlock times.

Check your mail before you pull. There were no livestream codes this version; the rewards Hypergryph would normally attach to a code were mailed: Oroberyl x1,000, T-Creds x10,000, Elementary Cognitive Carrier x8, Arms INSP Set x4, plus two post-maintenance claims of 900 Oroberyl each (update compensation and bug-fix compensation). That is 2,800 Oroberyl sitting in mail on day one.

Where to go from here:

• Endfield 1.5 guide — what shipped and what to do first
• Typhoeus — the 1.5 Phase 1 headliner
• RE-Factor Headhunting #1 (Yvonne rerun) — opens 24 September
• Endfield codes tracker — every code, live or expired

How 1.4 “Homecoming” ended

Version 1.4 opened on 16 July. Its closing banner deadline was tied to the 2 September version handover:

• Liino — the Electric 6-star Supporter, the idol nicknamed “Dawnstar” — headlines the Good Morning From Your Dawnstar banner until the handover on 2 September, alongside her signature weapon Bedazzling Night Debut (Polearm), carried on the paired armament banner [Bedazzled Issue] (the banner and the weapon are named differently). Off-rate limiteds on the banner are Arcane and Camille. This is three days later than we previously said, because the banner ends with the version and the version moved.
• The Rooted Realm, the mode added on 9 August, runs through the phase.

Endfield’s ~45-day version rhythm has held since launch (1.0 in mid-January, then four versions to 1.4 on 16 July), and 2 September is 48 days after 1.4 — comfortably inside that cadence. It is worth saying plainly that cadence is exactly what produced the wrong answer before: 45 days after 1.4 lands on 30 August, which is where the third-party estimate sat. Cadence brackets a date; it does not set one.

Arknights: Endfield 1.5 banners — what is official

The version has a name: [Dreamscape of Wind and Snow], 「雪淞幽夢」 in Hypergryph’s Traditional Chinese edition of the same bulletin. Hypergryph does not print version numbers in its English bulletins; the “1.5” is Hypergryph’s own, from the media entry for the version trailer on the official site’s homepage feed, filed under the name 1.5版本PV.

What the DEV Comm actually announces, in full:

• [Resplendent Spectrum] RE-Factor Headhunting #1, opening 24 September 2026 — a new banner type. Rate-up 6-star is Yvonne, the Cryo Striker; the pool is Yvonne / Ember / Lifeng / Ardelia / Last Rite / Pogranichnik. Pulls use Chartered HH Permit or Oroberyls.
• Its pity rules: 5-star or better within 10; 6-star within 80, and that counter is shared across every RE-Factor Headhunting banner; the rate-up 6-star within 120 across banners of the same name; free 10-pulls at 30 / 60 / 90; a Token of the rate-up 6-star every 240. Free Urgent Recruitment 10-pulls do not count toward any of it.
• [Tag Artist Issue] RE-Factor Issue #1, same day, rate-up on the 6-star Handcannon Artzy Tyrannical.
• A long list of quality-of-life work: [Continue Placing] and better box-selection in the AIC Factory, [Hide UI] in story dialogue, a new [Progression Overview] screen, faster stage switching, and enhanced snowy-weather materials.

Two things that follow, and they matter for planning. First, the DEV Comm itself announces no new operator for 1.5 — every name in the RE-Factor pool is already on the roster, which is why we read RE-Factor as the rerun mechanism getting a name and a date (that reading is ours; the pool and the date are Hypergryph’s). The debut is in a different channel: GRYPH FRONTIER’s Japanese press release of 21 August gives the 6★ Striker Typhoeus his own special scout, version opening to 30 September — the record and the correction are on the RE-Factor banner page. Second, 24 September is not the version start — with the version dated to 2 September it is a phase-two date, 22 days in, matching 1.4, whose second banner phase opened 24 days after the update.

The Si correction. This page previously said the community roadmap pointed to Si, the Feranmut Proxy, as 1.5’s expected headliner. That call was wrong. The DEV Comm never names her, and — checked against Hypergryph’s official operator page on 24 August 2026 — Si does not appear on the official 33-entry roster at all, in any language. The two roster entries that have never appeared in a published headhunting pool are Typhoeus (6-star Striker, Nature) and Purrchena (5-star Defender, Physical); the later official 1.5 update notes do tie them to this version. The full scoring is on the 1.5 roadmap page.

Arknights: Endfield 1.5 codes

No 1.5 codes were issued — there was no livestream this version and the rewards were mailed instead (see above). Endfield’s codes have historically arrived around milestones and official events rather than on a fixed schedule; if one appears, the codes tracker lists it with its expiry, and expired codes stay listed as expired rather than quietly deleted.

What we will cover on day one

A version day for a squad-RPG-with-base-building produces a particular failure set: the update not appearing on your platform, launcher download stalls, login errors at the moment servers open, and base/factory states behaving oddly after the patch. That is what this site does — see the launch-week guides for the format. If 1.5 breaks something on the way in, the fix coverage lands here.

The three that already exist, because they are the ones that recur every version:

• Is Endfield down, or is it maintenance? — how to tell a real outage from a scheduled window, and where the official status actually gets posted
• Endfield lag: work out which half it is first — client-side stutter and network latency look identical in-game and have opposite fixes
• Endfield high ping — most of it is decided by server choice before you press play

Sources

Source update: On 24 August this page replaced its inferred 30 August date with 2 September based on a GRYPHLINE press overview. At that point the official maintenance hour had not yet been posted. The later 31 August pre-download notice and version update notes set a planned 06:00–12:00 UTC+8 window and explicitly allowed earlier or later reopening.

The version name, the RE-Factor Headhunting and RE-Factor Issue banners, their 24 September date, their pools, their pity rules and the quality-of-life list come from Hypergryph’s “Dreamscape of Wind and Snow” Version DEV Comm, published 22 August 2026 at 18:00 (UTC+8) and read in both its English and Traditional Chinese editions on 24 August 2026; that bulletin gives no version date. The 33-entry roster, Si’s absence from it, and the class and element names used here (Striker, Defender, Heat, Cryo are Hypergryph’s own filter labels, which is why they differ from most third-party sites) come from the official operator page, same day. The Liino banner’s official wording — “Aug. 9, 2026 at 12:00 (server time) – Before version update and maintenance” — is in the “Homecoming” Version Update Notes of 16 July 2026 and the “Good Morning from Your Dawnstar” Chartered Headhunting notice of 8 August; because that wording ties the banner to the handover rather than to a calendar day, moving the version date moves the banner’s end with it. The 1.5 update time remains unannounced, and nothing on this page fills that in from a datamine or a leak.

• GRYPHLINE — official 1.5 update notes: scheduled maintenance 06:00–12:00 UTC+8, subject to early or late reopening
• GRYPHLINE — version overview issued to press 21 August 2026, dating [Dreamscape of Wind and Snow] to 2 September 2026, date only and no time; reproduced by Gematsu, whose headline carries the date
• Inven Global — the same GRYPHLINE press release, 23 August 2026, marked 'Press release provided by GRYPHLINE': the new version updates on 2 September
• Hypergryph — [Dreamscape of Wind and Snow] Version DEV Comm, 22 August 2026: names the version, dates RE-Factor Headhunting to 24 September, gives no version date
• Hypergryph — official operator roster, 33 entries: no Si; Typhoeus and Purrchena are the entries with no banner history
• Hypergryph — [Homecoming] Version Update Notes, 16 July 2026: the Liino banner runs from 9 August until the next version update and maintenance
• GRYPHLINE — 31 August 1.5 pre-download and maintenance notice for PC and PS5
• Game8 — Version 1.4 summary with the Liino banner window (Aug 9 – Aug 30): the third-party derivation this page used for its 30 August date, superseded on 24 August 2026 press report, not an official statement
• Game8 — banner schedule and 1.5 roadmap estimates: superseded on the version date by the publisher's own announcement press report, not an official statement