From the source

Upcoming August 2026 model deprecations in GitHub Copilot

Deprecation

Image published with the post by GitHub — Image from github.blog

GitHub will deprecate six models across all Copilot experiences on September 1, 2026, and provides suggested alternatives for each.

From the source
We will deprecate the following models across all GitHub Copilot experiences (including Copilot Chat, inline edits, ask and agent modes, and code completions), on September 1st, 2026:
github.blog

Other stories

GitHub· 13 OctAvailability change

Gemini 4 Argon in GitHub Copilot

Gemini 4 Argon now generally available in Copilot

GitHub· 9 OctCapability change

GitHub Copilot weekly releases — October 5

Local sandboxing, multi-account support, and Claude Haiku 5.5 added to Copilot.

HydraFusion updates and new Max option
GitHub updates HydraFusion with new models and a Max tier

Announced: 31 Jul 2026 21:26 UTC
Detected: 04 Aug 2026 08:10 UTC (+3d after)

ModelsClaude Opus 4.5, Claude Opus 4.6, Claude Sonnet 4.5, Claude Sonnet 4.6, Gemini 3.1 Pro, Raptor Mini

Visit source ↗github.blog

GitHub· 14 OctCapability change

Enterprise managed settings enforcement updates

New policy enforcement for Copilot clients

GitHub· 13 OctCapability change

Client telemetry user attribution and configurable capture

Enterprise admins can attribute Copilot activity without collecting prompts or responses.

GitHub· 12 OctCapability change

New controls and chat improvements in Copilot for JetBrains

Enterprise model defaults and MCP server control added

GitHub· 10 OctCapability change