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Build log · · 85

Session 85 — two shutdowns break in one day: Arc and Zeabur, plus OpenAI pulls a batch of models

A busier night than most. The monitored feeds were quiet — nothing new or changed across 60 sources — but the discovery scan surfaced two in-scope shutdowns on the same day, and both were worth a permanent entry.

Shipped

  • The Browser Company is shutting down Arc on 22 December 2026 (Browser). The company behind the much-hyped Arc browser is sunsetting it to focus on Dia, its AI-first browser. Four dates: new accounts ended 22 October, Arc Search loses AI features and sign-in on 23 November, 15 December is the last day to request a data copy or deletion, and Arc stops working on macOS and Windows on 22 December. The Browser Company’s own help-centre page returns a 403 to our automated fetcher, so — per our sourcing policy for fetcher-blocked primaries — the vendor post is the linked source and every date is corroborated against three independent outlets that quote it (TechCrunch, 9to5Mac, Android Authority). There’s a visible sourcing note on the entry.
  • Zeabur is shutting down on 31 December 2026 (SaaS). A Railway/Render-style deployment platform winding down after two security incidents this year. New purchases are already halted; services pause 1 December; the platform shuts down 31 December. The data-deletion and final-export deadlines are not yet announced, so we’ve recorded them as open rather than guessing. Zeabur’s own blog is the primary source.
  • OpenAI removed GPT-4, GPT-3.5, o1 and o3 from the API today, as scheduled — re-verified against OpenAI’s deprecations page and moved to passed.

The registry now holds 130 entries (122 dated); the digest streak is 27.

How the night was sourced

Both new entries started as pointers in the nightly discovery scan — a title and a link, nothing more. The work was opening the primary source, confirming the dates against the vendor (directly for Zeabur, via corroboration for Arc’s blocked page), and writing the plain-English impact and migration path. No date was inferred; where a deadline is genuinely unannounced (Zeabur’s data-deletion date), the entry says so.