GitHub retires six more Copilot models, Ubuntu 26.10 gets a July 2027 end date, and OpenSSL 3.4 is two days out

Two new entries tonight, both from official sources. GitHub deprecated another six Copilot models — Gemini 3.7 Flash, GPT-5.5, GPT-5.4, GPT-5.4 mini, GPT-5 mini and Grok 4.5 — on October 19, the latest in its monthly model-retirement cadence. Ubuntu's interim 26.10 release ("Stonking Stingray") now carries a July 1, 2027 end-of-life date. Nothing recorded changed its date. One archive backfill was also added — GitLab removing compliance pipelines in 20.0. On the board: OpenSSL 3.4 and the Minimus shutdown are two days out, with nine more dated sunsets before mid-November.

Two new entries tonight, both sourced to official primaries. Nothing already on the board moved its date.

New tonight

GitHub deprecated six more Copilot models on October 19. Gemini 3.7 Flash, GPT-5.5, GPT-5.4, GPT-5.4 mini, GPT-5 mini and Grok 4.5 are gone from most Copilot experiences — Chat, inline edits, ask and agent modes, and code completions. GitHub lists a replacement for each (Gemini 3.8 Flash; GPT-6.1 Sol; GPT-6 Luna; Grok 4.7). Most people just pick a supported model from the menu; the ones who need to act are anyone who named a now-retired model by identifier in a script, CI step, API integration, or enterprise allow-list policy. This is the latest round in GitHub’s rolling monthly model-deprecation cadence, following the September and early-October rounds, with more scheduled for mid-November.
Ubuntu 26.10 reaches end of life on July 1, 2027. The interim (non-LTS) release “Stonking Stingray” shipped October 15, 2026 and gets the standard ~9-month interim support window. After the date, Canonical stops shipping security updates — the quiet dead end for anything pinned to ubuntu:26.10, in a Dockerfile or on a box. The 26.04 LTS line is untouched (supported into 2031). Detectable by the lastcall CLI via the ubuntu:26.10 base-image tag.

Also added to the archive

GitLab is removing compliance pipelines in GitLab 20.0 (20 May 2027). A backfill of a known, officially-documented GitLab removal. Compliance pipelines — the way teams force required CI jobs to run in projects tagged with a compliance framework — are being retired in favour of the pipeline execution policy type. Deprecated since 17.3; the migration path is GitLab’s own. Verified against GitLab’s deprecations page.

The next three weeks, every date verified against its primary source

22 Oct — OpenSSL 3.4 end of life and the Minimus shutdown
23 Oct — OpenAI removes GPT-4, GPT-3.5, o1 and o3 models
27 Oct — Kubernetes 1.34 end of life
30 Oct — Fitbit’s legacy Web API shutdown
31 Oct — Consul 1.22 end of life and OpenAI’s hosted Evals platform going read-only
1 Nov — Alpine 3.21 end of life, OpenSSL 3.6 end of life, and Azure Databricks Runtime 10.4 LTS
2 Nov — GitHub Actions macOS 14 runner retirement and Mullvad’s encrypted DNS shutdown
10 Nov — .NET 8 and 9 end of support, Windows 11 23H2 end of servicing and Azure Functions PowerShell 7.4
12 Nov — PostgreSQL 14 end of life

Both imminent Azure dates above were re-confirmed by hand tonight against Microsoft’s release-communications API (the notices live on JavaScript-rendered pages our fetcher can’t read): Databricks Runtime 10.4 LTS still ends November 1, PowerShell 7.4 support still ends November 10.

Full board with live countdowns on the calendar.