GitHub will deprecate Gemini 3.7 Flash, GPT-5.5, GPT-5.4 (and mini), GPT-5 mini, and Grok 4.5 across Copilot on October 19, 2026, pointing users to Gemini 3.8 Flash, GPT-5.6 Sol/Luna, and Grok 4.6. Suggested replacements auto-enable for Business/Enterprise unless admins turned off default model enablement.
GitHub’s Sept 18 Copilot weekly adds efficiency, balance, and intelligence auto model tiers (same model pool, different cost/quality/latency tradeoffs), a Sentry canvas in the Copilot app to go from crash report to PR, and VS Code 1.138 Agents window support for running agents inside local Dev Containers…
Meta shipped Muse for Mac (Sept 17–18): the agent can use files, Messages, Calendar, Notes, and Mail in their native apps, with opt in access and approval prompts before sensitive actions. It follows the earlier mobile/web launch that topped the U.S. App Store…
Air Security disclosed Plugin4Shell (Sept 18): Claude Code, Codex, Copilot, and Gemini CLI could install swapped plugin code behind a pinned commit hash when the host allows hash shaped branch names. Claude Code 2.1.179 and Codex 0.146.0 are patched; Copilot has no fix yet, and Google will not patch Gemini CLI…
Google’s Sept 17 Android Bench 2.0 adds multi day long horizon tasks and continuous scoring; full task pass rates top out around 28% (vs 91% on the old incremental set). GPT 6 Astra leads the leaderboard; the suite also scores Gemini Flash, Fable 5.1, Kimi K3, and Qwen, with agent runs on Codex and Antigravity…
GitHub’s Sept 17 changelog adds 28 day feature engagement to the Copilot impact dashboard and report APIs—counts of users who used code completion, agent edit, code review, cloud agent, CLI, or the Copilot app on at least two days. Enterprise owners can see which surfaces stick in regular workflows…
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