Stay in Visual Studio 2026
Keep Codex close to Solution Explorer, your editor, and the code you are changing.
Codex support for Visual Studio 2026
Use Codex for C# and .NET in Visual Studio 2026.
Bring the Codex AI coding agent into the IDE where your C# and .NET work already happens. iolys connects to the Codex CLI while keeping solution context, sessions, tool activity, and permissions visible in Visual Studio 2026.
Provider access
Use eligible ChatGPT subscription access
Sign in through the Codex CLI with the account and plan you already use. When your ChatGPT plan includes Codex access, iolys lets you bring that route into Visual Studio 2026 instead of requiring a separate pay-as-you-go API setup.
Codex for .NET developers
Provider choice without workflow churn.
Best for: Agentic refactors, repository-wide changes, code review, debugging, and implementation work across .NET solutions.
Preserve your workflow
Switch to or from Codex without adopting another conversation interface.
See every action
Review tool calls, target files, and permission requests before sensitive work runs.
Connect Codex
Three steps to your first C# or .NET session in Visual Studio 2026.
- 01
Install and authenticate the Codex CLI.
- 02
Add Codex as a provider in iolys.
- 03
Choose your Codex model and start from the active Visual Studio 2026 solution.
Does Codex work in Visual Studio 2026?
Yes. iolys connects the Codex CLI to a provider-independent workspace built for Visual Studio 2026.
Do I need an OpenAI API key?
Not necessarily. The Codex CLI can use eligible account-based access; API-key options remain available when that is the route you prefer.
Can I switch away from Codex later?
Yes. Provider switching is a core iolys workflow, so your Visual Studio 2026 experience remains consistent.
Kiro
Ollama
DeepSeek
KimiUse Codex for C# and .NET without leaving Visual Studio 2026.
Keep your active solution, provider access, and development workflow.
Get iolys for Visual Studio 2026