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2026 (6)

March (2)

github: GPT-5.4 mini is now generally available for GitHub Copilot

GitHub

2026-03-17

GPT-5.4 mini is now generally available in GitHub Copilot and is rolling out to users. GitHub says early tests show it as OpenAI’s highest-performing mini agentic coding model.

github: GPT-5.4 is generally available in GitHub Copilot

GitHub

2026-03-05

GitHub Copilot is rolling out general availability of the GPT-5.4 model.

February (2)

github: Selected Anthropic and OpenAI models are now deprecated

GitHub

2026-02-19

GitHub deprecated a set of Anthropic and OpenAI models across all GitHub Copilot experiences effective February 17, 2026.

github: GPT-5.3-Codex is now generally available for GitHub Copilot

GitHub

2026-02-09

GitHub Copilot is rolling out general availability of OpenAI’s GPT-5.3-Codex model.

January (2)

github: Upcoming deprecation of select GitHub Copilot models from Claude, Google, and OpenAI

GitHub

2026-01-13

GitHub announced on Jan 13, 2026 that it will deprecate select GitHub Copilot models from Claude, Google, and OpenAI as part of routine retirements to prioritize newer, more capable models and maintain a fast, high‑quality Copilot experience.

dotnet: Generative AI with Large Language Models in C# in 2026

.NET

2026-01-05

Practical introduction for .NET developers to using generative AI and large language models from C# in 2026, covering modern tooling, SDKs, patterns, and best practices to build safe, efficient, and maintainable AI-enabled applications on the .NET platform.

2025 (6)

December (2)

github: OpenAI’s GPT-5.2 is now in public preview for GitHub Copilot

GitHub

2025-12-11

OpenAI’s GPT-5.2 is now in public preview for GitHub Copilot, a model optimized for long context handling and front-end UI generation, and is available to Copilot Pro, Pro+, Business, and Enterprise users (announced on the GitHub Blog, 2025-12-11).

github: OpenAI’s GPT-5.1-Codex-Max is now in public preview for GitHub Copilot

GitHub

2025-12-04

GitHub announced that OpenAI’s GPT-5.1-Codex-Max is rolling out in public preview for GitHub Copilot and will be available to Copilot Pro, Pro+, Business, and Enterprise customers.

November (3)

github: OpenAI’s GPT-5.1, GPT-5.1-Codex and GPT-5.1-Codex-Mini are now in public preview for GitHub Copilot

GitHub

2025-11-13

GitHub Copilot has begun a public preview rollout of OpenAI’s latest 5.1-series models—GPT-5.1, GPT-5.1-Codex, and GPT-5.1-Codex-Mini—bringing the new general and code-specialized models (including a smaller, low‑cost/low‑latency Codex-Mini) to Copilot users. The announcement was posted on the GitHub Blog.

vscode: A Unified Experience for all Coding Agents

Visual Studio Code

2025-11-05

The article announces that coding agents have become central to VS Code in 2025, describing new agent mode, Copilot integration, and the GitHub Copilot CLI while noting the growing ecosystem of agents from providers like OpenAI and Anthropic.

security: SesameOp: Novel backdoor uses OpenAI Assistants API for command and control

Microsoft Security Blog

2025-11-03

Microsoft DART researchers identified a novel backdoor, dubbed SesameOp, that abuses the OpenAI Assistants API as a covert command-and-control (C2) channel. A component of the backdoor uses the Assistants API as a storage/relay to fetch commands and execute tasks inside compromised environments, avoiding traditional C2 methods.

October (1)

github: Selected Claude, OpenAI, and Gemini Copilot models are now deprecated

GitHub

2025-10-23

On October 23, 2025, GitHub deprecated selected Claude, OpenAI, and Gemini models across all GitHub Copilot experiences (including Copilot Chat, inline edits, ask and agent modes, and code completions), according to a GitHub Blog changelog post.